Wpf contentpresenter performance. In this case I would use the .

Wpf contentpresenter performance From the DataTemplateSelector docs:. Because a new container isn't generated when a property value changes, a new DataTemplate is never going to be applied via the selector. Thanks. In this case I would use the I find that the ContentPresenter used to display the content of a DataGridTemplateColumn displays the default ErrorTemplate when the row's item contains validation errors. Here's some simple code showing them both: <GroupBox> <ScrollViewer> <ItemsControl ItemsSource="{Binding}"> </ItemsControl> </ScrollViewer> </GroupBox> A small post to explain the little but important difference between ContentControl and ContentPresenter. Changing content of Window (WPF) 1. The other ToolBar does. Featured on Meta We’re (finally!) going to the cloud! Updates to the upcoming Community Asks Sprint. NET APIs; The latest language improvements; Improved accessibility and reliability; Updated tooling and more; To learn how to upgrade your application, see How to upgrade a WPF desktop app to . Change ContentPresenter's DataTemplate. WPF exists as a subset of . Perfect for both beginners and experienced developers. Yes, there is. DataGridTextColumn It looks like this static DataGridTextColumn() { ElementStyleProperty. We have a relatively simple forms application. Fast-forward to 2024, and we encountered a problem in Visual Studio 2022 where a WPF dialog would show a thick black border on only part of the right edge of the dialog window. Setter for elements inside ContentPresenter. The way the controls look for their style is by moving upwards in logical tree and asking the logical parent if there is appropriate style for them stored in parent's resources dictionary. SetValue(StyleToLoadProperty, Sometimes we encountered WPF performance issues. Override typed textblock style for contentpresenter in WPF. I have put the Button inside the Grid just to prove to myself that the ContentTemplate is From bugs to performance to perfection: pushing code quality in mobile apps WPF ContentPresenter inside an ItemsControl. that has the same effect as swapping. Styling a Textblock autogenerated in a ContentPresenter. 0, then WPF uses Tier 1 rendering mode. e. E. How to get ContentPresenter in code behind? 10. WPF provides a suite of performance profiling tools that allow you to analyze the Assigning Icon to the ContentSource property just means that the ContentPresenter is having that Viewbox as a content. Content binding is no longer targeting the YourBooleanProperty and this property is instead part of the templates. The textbox has no parent but the TemplateParent-property leads to the ContentPresenter as the TextBoxes parent and the DP-system takes the FontSize-value through attached dependency property inheritance from the Your Content property is set to a DataTemplate. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The template can just bind the separate ContentPresenter instances like this (I've only set one property here but you'll likely want to set others): <ContentPresenter Content="{TemplateBinding Content1}"/> <ContentPresenter I could be wrong, but I believe the DataTemplateSelector is only used when the ItemContainerGenerator creates a container for an item added to the collection. is resource usage same if we use your WPF Control Inheritance. " C# WPF MVVM XAML: Using ContentPresenter Style to display ViewModel Load 7 more related questions Show fewer related questions 0 At the moment I have a Window control with the heading and icon bound to properties on a view model, but as I am currently seeing it the visual nature of the "stuff" makes it another view, so I have put a contentpresenter into the window, and this is where I come unstuck. Alternatively, you could The ContentPresenter. Please refer to the following sample code which sets the Content I have a wpf application. After some googling, I came across WPF Performance Suite page which describes exactly the tool I need - Visual Profiler. Now, my actual problem: My "m_Employees" list is returning about 500+ employees from the database, so the collection is slightly big. WPF The question is pretty much self-explanatory. ContentPresenter triggers not working. The styles contain the control templates which define what the UI of the control is made up of. . From bugs to performance to perfection: pushing code quality in mobile apps WPF: How to replace the TextBox of Datagrid used for Editing in a DataGridTextColumn. Windows. Program with WPF. In this case I would use the This makes it a mid-level performer in this area. ContentControl is to make a WPF custom control (dont mix up with user control). WPF ContentPresenter Content null when Visibility=Collapsed. The biggest challenge and criticism Blazor WebAssembly faces is its performance. Row="1" /> </Grid> The content of the ContentPresenter is a data object, and a datatyped DataTemplate defines the UI for the ContentPresenter (the root of which is another UserControl). What should I put in the Fill property of the Path Element, and which property should I change in the ContentPresenter to make its value propagate to the Fill property ? Hope I was clear. I would recommend emddudley's third option of the ContentPresenter and setting the content (Composite UI). When I remove a certain TabItem from the collection, depending on the content displayed in the TabItem, there can be a noticeable two or three second delay, before the // Extended TabControl which saves the displayed item so you don't get the performance hit of // unloading and reloading the VisualTree when Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company <Label> <Border> <ContentPresenter> <TextBlock /> </ContentPresenter> </Border> </Label> and the same thing happens (question updated with that info). min read. This technique becomes even more useful How could I "redirect" the Content I'm defining in my MainView into the self-defined ContentPresenter inside my Button Template instead of the UserControls's ContentPresenter? The ContentPresenter must also set up the data bindings between the properties of the elements in that visual tree and the properties of the object stored in its Content property Learn different ways to improve the performance of a Blazor WebAssembly application. Profiling a WPF application is an important step to understanding its behavior. Having read an excellent article on rendering many moving shapes, I implemented this using a custom Canvas descendant that overrides OnRender to do the drawing via a DrawingContext. WPF ContentControl not showing user control (which should be bound by DataContext) 18. I've now found an "emergency solution" to my question now, basically writing a Wrapper class that monitors changes to the ContentPresenter and exposes its first visual child / or a visual child element by name as a property, and an IValueConverter converting the ContentPresenter to this Wrapper. Featured on Meta We’re (finally!) going to the cloud! More network sites to see advertising test [updated with phase 2] Design and performance of Bi-Planar Rotors or Propellers It was a job spec for a WPF contract where they want help sorting out the performance of their app especially around grids and tabular data. NET Core UI framework for building Windows desktop applications. ContentPresenter is a very specialized Basically, you're only overriding one of the SelectTemplateCore overloads. Style inside ContentPresenter is not applied. Going with the ContentControl is a bit easier, and here's the code you'd probably end up with. Xamarin Forms binding within ContentPresenter. So in the end, your data need to be wrapped in some deterministic way Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company In WPF we suggest using the Direct2DRenderOptions. Yes, there is. Instead you should use a ContentControl, which is simply a control that has a content element. Besides the background, the list box contains a collection of UI elements that are bound to an ObservableCollection via ItemSource, and then presented via item presenter. We definitely do not want to pay a high performance penalty for instantiating visuals for items that are not visible. wpf; contentpresenter; or ask your own question. ContentSource is what actually makes the biggest difference between the two classes. WPF ContentPresenter content not inheriting DataContext. Reply to this comment. HasValue, and understandably fails. Application contains Large Data GridViews(or TreeListView). XAML that contains the content presenter: The content of the ContentPresenter is a data object, and a datatyped DataTemplate defines the UI for the ContentPresenter (the root of which is another UserControl). it might be better to use adorners to get the performance advantages and The default behavior of WPF is to unload items which are not visible, which includes unloading TabItems which are not visible. This property is bound to a ContentPresenter in style that has custom style resources: <ContentPresenter ContentSource="AdditionalContent"> <ContentPresenter. Improve this answer. The trouble is, because it is part of a DataTemplate, it is not auto-generated as a private member of the class, like it would be if I wasn't using the ContentPresenter + DataTemplate. How do I set the Foreground property of a possible TextBlock in a ContentPresenter in Silverlight? 2. Viewed 2k times 2 first I want to mention that I'm new to C# WPF. Additionally, creating your own converter gives C# WPF ContentPresenter MenuItem TextAlignment. GetValue(StyleToLoadProperty); } public static void SetStyleToLoad(DependencyObject obj, object value) { obj. How to change TextBlock default properties for a ContentPresenter in a template. Ask Question Asked 8 years, 11 months ago. The default template for ListBoxItem consists of The contents of generic. Originally I had the background XML within the ListBox's template, and this worked In this scenario, the TextBox is created through the ContentPresenter because text cannot be entered in the visual tree. The below code shows how can use it but as far as I remember TextBox does not have a property likes "Content", so you may transfer value of TextBox class's Text,Padding WPF 4 ContentPresenter TextWrapping style is not applied to implicitedly generated TextBlock. For example, with your code you are setting the . Commented Jul 11, 2016 at 16:22. /// </remarks> public ContentPresenter() : base() {Initialize();} 30 columns is a lot for a grid. UC value, it tries to look for UC. I want the following behaviour: if an item gets clipped by another UIElement - set it's visibility to collapsed instead. g. This is applied in a completely literal way, and so even the simplest of optimizations aren't applied. Bottom; } This changing of property using Loaded event handler can be done using Blend Behaviors / ContentPresenter templateParent = GetFrameworkElementByName<ContentPresenter>(listViewItem); and inside my templateParent have the content as shown below I want to do something like The fundamental issue with WPF stems from XAML as a concept, where markup represents objects in a 1:1 fashion. Content is. There was a good site here which contains code to extend the TabControl and stop it from destroying There are 3 ways to do this. What I would like to do, then, is to use the button like this: TemplateBinding and ContentPresenter in Silverlight/WPF. 2) To apply ellipsis trimming in DataGridHyperlinkColumns, in App. But you can do the same thing with a binding on a You typically use the ContentPresenter in the ControlTemplate of a ContentControl to specify where the content is to be added. If you use a custom template for your tab control then you'll be able to set the style of the tab control to anything you want. When a template contains a ContentPresenter with ContentSource set to "Abc", the Content, ContentTemplate, and ContentTemplateSelector properties of the ContentPresenter are automatically aliased to Abc, AbcTemplate, and AbcTemplateSelector, respectively. Use alternative constructor /// that accepts a Dispatcher for best performance. The ContentPresenter being the only important part, really. ️ Thank You for Supporting Ukraine! potentially causing performance issues. Share. System. A button in the outer UserControl needs to have its content bound to the value of an attached property defined on the inner UserControl hosted by the ContentPresenter. WPF controls have built-in functionality to support the customization of data presentation. My primary use of it is to dispatch the view by the runtime type of the content. Modified 2 years, " FontWeight="Medium" Margin="0,0,0,10" /> <ContentPresenter Grid. VerticalAlignment. <ContentPresenter Content="{Binding Content}"/> Simple enough. If The exception has been isolated to the <ContentPresenter /> tag inside the header template. I've put the ContentPresenter outside of the toolbar in a Grid and it appears fine. xaml. So once the content is set to ViewModel. I would also note that I've had some problems with performance and tabcontrols in the past. The test block does not display any text and it seems to be hidden. 1. 0. Since this is a Better performance; New . So all you do is gut out its Template and feed the Content property the UserControl has into something a little different; in this case, your button. Foreground on the ContentPresenter with a Trigger for IsEnabled="False" void ContentPresenter_Loaded(object sender, RoutedEventArgs e) { (sender as ContentPresenter). Browse the sample. Compiled bindings can be used for nearly anything and can replace other missing features like MultiBinding. ItemsControl – has ContentPresenter ListBox – has ListBoxItem ListView – has ListViewItem. For the same reason public ref class ContentPresenter : System::Windows::FrameworkElement (Rect) implementation (or a WPF framework-level equivalent) to form a recursive layout update. Here is a example of 2 enhanchements made in SP1: Deffered scrolling & UI Element recyceling!!! Share. Featured on Meta We’re (finally!) going to the cloud! WPF - ContentPresenter does not bind to UserControl Content. ControlTemplate, you could use the attached property TextElement. Each TreeViewItem contains a ComboBox, and a dynamic element whose template I want to change based on the value selected in the ComboBox. Probably the second-best performance for this pass. ContentPresenter to show an Icon --> <ContentPresenter Margin="0,10,0,35" x:Name="Icon" VerticalAlignment="Center" ContentSource="Icon"/>   <Border x:Name="SuperNiceBorder" tag tag tag> <HERE I WANT THE CONTENTPRESENTER> </Border> </UserControl> Is there a way to tell WPF I want the text set by the user in the Content just there ??? Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company You've two questions here:) Where to make a decsion in XAML(DataTriggers) or in code TemplateSelector; What are you overriding the whole Style or just the DataTemplate. Is there a way to prevent the Tab Unload/Reload when a tab changes in a WPF tab control? It basically stores the ContentPresenter of the tab and loads that up when switching tabs instead of redrawing it. In this case, Profiling Visual Performance. Update : I've been working with WPF treeview for a bit recently and I'm having a really awful time trying to get the selected item to show up on the screen when the user uses a search function that sets the . The article explains the role of the Visual object, the types of render data, and the order of drawing Learn how to optimize your WPF application's speed and stability by using various techniques such as lowering bitmap scaling mode, using static resources, UI virtualization, deferred scrolling, and more. This means that every time you go to the tab, View is rendered anew, therefore affecting the performance, even more so if View is weighty. Change your Style Setter to set the ContentTemplate instead of Content and it should work fine <Setter Property="ContentTemplate"> <Setter. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I've created a simple behavior for you that resolves your issue pretty well: public class Behaviour { public static object GetStyleToLoad(DependencyObject obj) { return (object)obj. 3. Discover how to master WPF data templates with this comprehensive guide. Find the buttons that were declared at the start of this article. I have a TabControl in WPF. Linked. WPF/MVVM Load a View dynamically at runtime. WPF Some styles not applied on DataTemplate controls WPF: ContentPresenter changing Foreground unexpectedly depending on where styles are located. Accessing a control which is in a contentpresenter in c#. Resources> <Style TargetType="{x:Type WPF: ContentPresenter changing Foreground unexpectedly depending on where styles are located. The DataGridColumns that derive from DataGridBoundColumn (all except DataGridTemplateColumn) has a property ElementStyle that is applied to the TextBlock when it is created. Ideally I would just style the built-in one but there's some quirks to our codebase and I have to keep the existing behaviour. WPF Binding View as Content. 297 5 5 WPF DataTemplate ContentPresenter "Binding" 2. xaml include styles for one or more controls. I am a newcomer to WPF, attempting to build a project that follows the recommendations of Josh Smith's excellent article describing The Model-View-ViewModel Design Pattern. This internally causes the ContentPresenter to update its DataContext property, which means that all of its How to Keep the Content State. It is the place where the Content of a control is placed. This means when you go back to the tab, the TabItem gets re-loaded, and anything not bound (such as a scroll position, control states, etc) will get reset. Here is a small compilation of such tools: Snoop WPFPerf Perforator Visual Profiler. ContentPresenter by itself does not have any Visual Style's. ContentPresenter in Templated Control not working. It will fill its containing region, but the content items added will only take up the space they require. Ask Question Asked 2 years, 8 months ago. Add a ContentPresenter to the button's ControlTemplate. This property should only be used when the ContentPresenter is in a template. If you use Control Template you should use Template binding to bind real component properties. SnapsToDevicePixels="True" got rid of the line! 🤷🏼‍♂️ – I want to add a MouseBinding for a DataGrid in a global style resource, so that the "EditCommand" defined in the base ViewModel is fired for every DataGrid. For performance optimization the ControlTemplate of the RadTabControl defines a single ContentPresenter which holds only the currently selected RadTabItem's Content. ItemsControl, as suggested by the name, is meant to display multiple items within it. You should use the ContentControl in all other situations and you can use the ContentControl. If your video card supports full hardware acceleration for all graphics output, corresponding to a version of DirectX equal or greater than 9. Commenting it out clears the exception. Other advantages include debugging support as well as increased performance. // So in order to achieve what we want, we remember the original DataContext and then // change the ContentPresenter content to the actual cell object. I thought I'd shared some tips & tricks I've picked up along the way, these aren't probably going to solve any issues you might be having directly, but they might point you in the right direction when Yes, exactly - very similar to an Excel Autofilter. gilad gilad. The concept of ContentPresenter is You can set the ContentTemplate property of a ContentPresenter to a panel containing some content, using a DataTemplate. Works beautifully if using the @blindmeis idea. As suggested in the comments, I would recommend you look at and I'm trying to bind 'HorizontalAlignement' and 'VerticalAlignment' of the ContentPresenter to the template. 2. I didn't use a single 'IsXYZVisible' property. 0 and 9. I added it into the answer. I mimicked the same behavior using contentpresenter in the ControlTemplete (one for the TabControl's SelectItemHost and another for the Popup). DataTemplates are meant to be used with Template properties, and not directly inserted into the VisualTree via the Content property. How can I change the TextAlignment of a text in a ContentPresenter. You can disable the implicit Style for a TextBlocks that . ContentSource property specify which dependency property of the parent template instnace should be used to If dragging the item slowly, performance seems to be ok - however if I move the mouse faster the UI thread drops to zero FPS - probably trying to do too many layout updates too quickly; this is also backed up by the performance profiler, as during these zero FPS moments, only layout update calls are handled (with no render calls) Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company When the content property of a ContentPresenter is of String type, it automatically uses a TextBlock as its child element. I use recycling virtualization and after scrolling shows some cells in random order. InvalidOperationException: Can not set Visibility. 5 WPF app and having UI rendering performance issues. I have the following ListView in my code. October 28, 2016. Refreshing the view (e. It's merely a placeholder for the Content of the Control in the Style which it resides in. Issues that i had met most often are. My only guess would be WPF knows to render a System. If you WPF - determine if TextBlock is being clipped inside ContentPresenter. You can dynamically compile data templates per column using xamlReader. NET types that are, mostly located in the System. Featured on Meta WPF DataGrid Get Cell Content Setting SizeToContent to WidthAndHeight should work. the performance goes down! The following style works for me perfect . WPF - Content section control. All of this works fine, since I am using the HeaderStyle property of the column to load a StaticResource for Style that defines a Grid layout and Works beautifully if using the @blindmeis idea. Use the template. a Grid, you have to set the alignment properties to some other value that the default Stretch, because otherwise the Label will be resized by the Panel (for example to the size of the Grid cell that it occupies). 5. Content, which isn't a valid ContentSource for ContentPresenter. ; Here're my 2c: I'd stick with the Triggers, as you'll get an unbeatable flexibility level with them - a new editor for the price of If you look at the Output pane in VS at runtime, you'll find that the bindings on the ContentPresenter are looking at the ContentPresenter's DataContext for the properties TextFont and BindedTextColor, as expected -- but the DataContext is not what you expect. Nested ContentControls with template. ContentPresenter in UserControl. Creating the above effect using a converter is slightly more efficient in terms of performance. What's going on here? From bugs to performance to perfection: pushing code quality in mobile apps WPF ContextMenu itemtemplate, menuitem inside menuitem. The performance is quite reasonable, although the CPU usage I am using couple of DataGridTemplateColumns in my XAML DataGrid, each one of which is group of text boxes, since I wanted a grouped header layout for the columns (e. Learn the basics, explore advanced techniques, and get practical examples to create dynamic and visually appealing UIs. There comes a time in the life of every Windows Presentation Foundation (WPF) programmer when the true power of the DataTemplate suddenly becomes evident. Find parent of control inside ContentPresenter. The concept of ContentPresenter is quite simple – it is a placeholder for any XAML content and it can be used to insert content at runtime. In WPF, that's probably the most common way to produce a "swapping" effect. ContentSource property makes sense only within a ControlTemplate; it determines which TemplatedParent property the content should be mapped with. Windows namespace. Content> <connection:ConnectionSelectPage /> </ContentPresenter. Follow answered Jan 26, 2022 at 9:09. To address this problem more efficiently you can use The most significant difference is that ContentPresenter has the ContentSource property while ContentControl hasn't. The most significant difference is that ContentPresenter has the ContentSource property while ContentControl hasn't. The Perforator, Visual Profiler is part of the WPF The ContentPresenter does not appear when executing. The intended usage of Use these resources improve performance of Windows Presentation Foundation applications, such as planning for performance and taking advantage of hardware. I have a usecase to show nearly 10000 items in a WPF usercontrol. DataContext is set to whatever the value of ContentPresenter. By default, it will stretch to fill its entire containing region, and the content within the ContentControl will stretch to fill it. I am creating a custom WPF control that let's say for simplicity sake has a vertical stack panel with a "title" TextBlock, followed by a ContentPresenter. An ItemsControl displays multiple items and will fill its region, but its items will occupy only the space they need. This TextBlock will pick up the implicit Style and that's why you're getting this problem. I get a performance hit in WPF only when the application first starts up and someone navigates to that tab with the ListBox on it. However, you need to keep in mind that when you set a PointTemplate to any series, you actually force the RadChartView control to create separate ContentPresenter for each DataItem. Modified 8 years, 11 months ago. To modify the Foreground in your custom Button's Style. // If the default value WPF was intended to be used for complex / Rich UIs from the beginning and is optimized to work on situations where there are thousands of controls, rather than the 1-control case. Includes tips, best practices, and common pitfalls to avoid. /// ContentPresenter is used within the template of a content control to denote the /// that accepts a Dispatcher for best performance. (I am using the DataTemplate because I need to use DataTriggers, not Than i attempted subclassing ObservableCollection to chunk inserts hoping that batching them would improve performance/decrease cpu workload, but this approach appears to require calling CollectionView. The resulting XAML for ControlTemplate would look like: From bugs to performance to perfection: pushing code quality in mobile apps. Changing content of Window (WPF) 4. 34. NET MAUI) control templates enable you to define the visual structure of ContentView derived custom controls, and ContentPage derived pages. The overall recipe: Create a ContentControl or UserControl named ViewCache: public partial class ViewCache { public ViewCache() { InitializeComponent(); Unloaded += ViewCache_Unloaded; } void ViewCache_Unloaded(object sender, RoutedEventArgs e) { Content = null; } private Type I am running into issues where i have a datagrid in my WPF application that is showing around 200 cells (10 columns, 20-40 rows depending on window size). Template> </ToggleButton> <ContentPresenter However after the template is selected // the ContentPresenter will set the DataContext of the template to the presenters // content. There is a strange thing that as long as i mousedown the ComboBox droparrow becomes all UI response very slow, regardless of whether ComboBox have items. However, the DataGrid does not show - which makes sense, as the ContentPresenter is empty. WPF controls such as the ListView and ComboBox are used to display lists of items in an application. TreeListView has been rendering in a real-time mode (Be refreshed every second). NET 7. There was a good site here which contains code to extend the TabControl and stop it from destroying From bugs to performance to perfection: pushing code quality in mobile apps. VerticalAlignment = System. What is getting rendered is : <TabControl> <TabItem> <ContentPresenter Content=CustomerDetailsViewModel> Windows Presentation Foundation (WPF) includes many of the common user-interface (UI) components that are used in most Windows applications. I have <ItemsControl> which create view for my <custom:Pack> list: <ItemsControl ItemsSource="{Binding List}"> <ItemsControl. – 15ee8f99-57ff-4f92-890c-b56153. Changing default textblock in ContentPresenter. If the app is resized so that the ContentPresenter becomes bigger than my UserControl, then I get a bunch of whitespace around my UserControl. 9. Design and performance of Bi-Planar Rotors or Propellers WPF was intended to be used for complex / Rich UIs from the beginning and is optimized to work on situations where there are thousands of controls, rather than the 1-control case. , measuring how much screen space a control needs and placing it on the screen), we need to briefly discuss the objects which get layouted. If I run the for-loop quite a I'm developing a . You shouldn't try to Style that content because the Style options are limited and they won't be passed through to the actual content anyway. WPF ContentPresenter bound to a collection. In this article, I will call them control, which can be anything that inherits from FrameworkElement like Control or TextBox or . This method constitutes the second pass of a layout update. A ContentControl is used to display a one piece of content and it stretches to fill its region. It's still there though. HasValue rather than ViewModel. I'm using ContentPresenter with DataTemplates, and I null the Content property in ContentPresenter, when I don't want to display the content. Gets or sets the distance between the border and its child object. What would I have to add, to show the regular DataGrid with the At the moment I have a Window control with the heading and icon bound to properties on a view model, but as I am currently seeing it the visual nature of the "stuff" makes it another view, so I have put a contentpresenter into the window, and this is where I come unstuck. Row="1" /> </Grid> </materialDesign:Card> </ContentControl> Then, I call the Component in a view and attempt to fill its Content: From bugs to performance to I have to use the contentpresenter as I am filtering what is displayed (text wise) using the DisplayMemberPath of the ListBox itself. There are lots of tools in the market for profiling WPF applications. Refresh which is the same as calling Reset() on the collection, and also ineficient when there are lots of items in the collection. Hot Network Questions The WPF data templating model provides you with great flexibility to define the presentation of your data. Conditional Content Presenting via WPF ContentPresenter. To avoid this behavior, I typically use an extended version of the TabControl that stores the ContentPresenter of each TabItem when you navigate away from it, however I find it I have a Button Style with a Template containing a ContentPresenter, in which I am attempting to bind the Fill of a Path to the Foreground of a button: <!-- This is inside the template of a but WPF is great because there are many ways to achieve your goals. I'm working on a game-like app which has up to a thousand shapes (ellipses and lines) that constantly change at 60fps. WPF DataTemplate ContentPresenter "Binding" 1. If you remove that it will can be aligned properly by setting the VerticalAlignment and HorizontalAlignment of the If the ControlTemplate is applied to a ContentControl type, such as a Button, a ContentPresenter is searched for in the element tree. I'm trying to get a ListBox to change its back ground from a Grid to a user selected Image at the click of a Button. Let me explain: imagine that you have a property of type You can set the ContentTemplate property of a ContentPresenter to a panel containing some content, using a DataTemplate. 25k 9 9 gold badges 72 72 silver badges 92 92 bronze badges. I can't see any direct w To handle XAML content in a custom Templated Control you have to either derive your control from the ContentControl or stay inherited from a Control, implement a custom ContentProperty and bind a ContentPresenter to it. // Extended TabControl which saves the displayed item so you don't get the performance hit of // unloading and reloading the If your video card supports partial hardware acceleration, such as if you're running a version of DirectX between 7. Some team members believe that redesigning the templates for basic controls will improve performance and maintainability. 10. Using Josh's sample code as a base, I have created a simple application that contains a number of "workspaces", each represented by a tab in a TabControl. this might actually be better than using a converter for performance reasons if you intend to I had the same issue, and I ended up using some code I found online that extends a TabControl to stop it from destorying it's children when switching tabs. But the problem is when the Popup is open up, the NavigationPane selected content when away and it appears when we switch back to the same navigation item from another navigation item. - dotnet/wpf. This Property references another ViewModel. I have an ItemsControl with a dynamic size that contains fairly basic items. 12. NET Multi-platform App UI (. If that object type has a matching template, then WPF will use it. WPF: ContentPresenter changing Foreground unexpectedly depending on where styles are located. The following Label should do what you want. 0, then WPF uses Tier 2 rendering mode. One preferred technique is to create multiple control templates for a control, and swap them out with triggers. It allows to view WPF elements tree and analyze the contribution of each element to the total rendering time. Try replacing the StackPanel with a VirtualizingStackpanel and set the VirtualizationMode to Recycle and you will see a huge performance boost. To address this problem more efficiently you can use ContentPresenter instead. Featured on Meta We’re (finally!) going to the cloud! Override typed textblock style for contentpresenter in WPF. Viewed 330 times 0 I'm refactoring some code at the moment, and am attempting to make a custom 'TabControl'. String as a TextBlock without implicit styling, but when From bugs to performance to perfection: pushing code quality in mobile apps I have 2 ContentPresenter fixedContentPresenter and resizableContentPresenter and obviously a Content in Generic. WPF ContextMenu - no String with ItemTemplate WPF ContentPresenter inside an ItemsControl. Rhyous says: November 15, 2013 at 11:11 am. This control can switch its content using predefined triggers and data I think, in this case the problem covered not in Catel. - by setting the ContentTemplate - by setting the Template - or using the Border directly and apply a style. The more columns you have, the more WPF has to render, which slows things down. This is a clear advantage of UWP. WPF unloads non-visible objects, and this means that when you navigate away from a Tab, it will unload the UI controls on it and and load a new set of controls. In this case, the content you want to present is SelectedItem. The ContentPresenter. ItemsPanel> <ItemsPanelTemplate& I have an WPF application, where I use a big number of a object set using a ControlTemplate, here is the code : <ControlTemplate x:Name="ControlTemplate" TargetType="{x:Type graphsharp: Learn to build a high-performance oil and gas dashboard using SciChart WPF. microsoft. Note that the ContentPresenter. To define an effective DataTemplateSelector subclass, provide implementations for SelectTemplateCore(Object) and SelectTemplateCore(Object, DependencyObject). jball. I've just rewrote a whole module in our WPF application. I want the font size for the "title" to be 5 Points LARGER than the size used in the content, which is inherited by whatever container the user places this control in. Using another panel can give you extended possibilities in styling and scrolling, but it might be problematic if you have hundrets or Here my borders and fancy things. xaml Also the templateselector itself is created in the resources and passed to the ContentPresenter. However, if I DIRECTLY execute the code in the for-loop after setting the ItemsSource (like in the bottom example), the contentpresenter is null and I cannot work with it. Turning off virtualization is not an option as performance is really bad with it off. The idea behind it is that the ContentPresenter of each TabItem gets cached WPF ContentPresenter inside an ItemsControl. For example, from what I understand, adorners can add some controls to a UI element, but I think that the same behavior can be achieved through a custom control that contains the additional element. 4. Style definition in Themes/Generic. Value> <DataTemplate> <TextBlock Use WPF Profiling Tools to Profile a WPF Applicaton. ContentPresenter with ContentTemplateSelector inside an ItemTempate of an ItemsControl. ItemTemplate. The default behavior of WPF is to unload items which are not visible, which includes unloading TabItems which are not visible. "> <ContentPresenter. devblogs. It's just a way to tell WPF "every time you need to display this type, use this template" Your ContentPresenter has its Content bound to some object. The thing that you seem to be missing is how and what to data bind to from inside a DataTemplate. This topic contains techniques for improving the performance of your UI. The overall recipe: Create a ContentControl or UserControl named ViewCache: public partial class ViewCache { public ViewCache() { InitializeComponent(); Unloaded += ViewCache_Unloaded; } void ViewCache_Unloaded(object sender, RoutedEventArgs e) { Content = null; } private Type WPF offer container recycling, you may perhaps leverage that to minimize the view creation hence a little gain in performance since the containers will be reused. When I try to display content from the ContentPresenter I cannot see anything. All I want to do is set the FontWeight to Bold and the Foreground to White when an item is selected in the ListBox. Please let me know how can I use styles efficiently without incurring a Performance hit or how can I paint the ContentPresenter Border's Background as same color as Button (transparent would work somehow). Triggers> </ControlTemplate> </ToggleButton. Medium performance for the measure pass and fast performance for the layout pass. Change ContentTemplate of Contentpresenter through Templatebinding. So it WPF is a . WPF is sorely missing this type of localization support. To avoid this behavior, I typically use an extended version of the TabControl that stores the ContentPresenter of each TabItem when you navigate away from it, however I find it I am trying to get access to a named TextBox (textBoxAnswer) in the code behind of my WPF Page. See code examples There are valid uses of ContentPresenter everywhere. So I have a series of pages that I want to display for an application I am working on but I want to start by simply displaying a ViewModel with a ContentPresenter within another ViewModel. The UI freezes for about 3 seconds, but only when the app first starts up The ContentPresenter element is responsible for displaying the contents of the Button. I'm trying to fire an animation when a content control such as Button or ContentControl changes its content. I can make it work if I use: <ContentPresenter> <ContentPresenter. You can disable the implicit Style for a TextBlocks that The problem is that my UserControl is not resized to fit within the ContentPresenter, so when the ContentPresenter is too small to show everything, my UserControl is simply cut off. The downside of this, is that it calls for repeating definitions of Margins, and the UserControls are kind of dedicated to "fit" in the ContentPresenter. 30 is too much for usability anyway. The TreeViewItems are generated by a list in my model. For e. I finally ended up with the following solution (more like a workaround, but it works fine): 1) I assigned an x:Key to the style in question and applied it as a CellStyle to all DataGridTextColumns that should have their contents trimmed and ellipsisized whenever they don't fit. Once you provide an implementation for SelectTemplateCore(Object, The problem of your style is that it does not use any kind of UI Virtualization. Featured on Meta re (finally!) going to the cloud! Updates to the upcoming Community Asks Sprint. Therefore each time the selection is changed the content of the last active item is unloaded in order to load the content of the newly selected item. Control templates separate the user interface (UI) for a custom control, or page, from the logic that implements the control or page. Loads of very cool performance increases for WPF!!! Read more here. ContentSource property specify Learn how to use the Visual class and DrawingContext to render graphics in WPF, including video, images, and text. A control looks for its style at the point when it is being initalized. views:GameCard is a custom UserControl and {Binding} is a valid DataContext object with three items. Content Property to set the content and the I can't find an official source, but I've found what this blog says to be correct: "ContentPresenter’s DataContext is automatically set to the value of its Content property, while ContentControl’s DataContext is not. What do these French performance directions in string parts say? First use of an invincible monster with a "core" more hot questions Question feed There are 3 ways to do this. Featured on Meta We’re (finally!) going to the cloud! WPF 4 ContentPresenter TextWrapping style is not applied to implicitedly generated TextBlock. It's the ContentPresenter's Content property. Additionally, if a hidden element has a binding that fails, an exception will be raised and silently suppressed by the framework, potentially causing performance issues. How to use a ContentPresenter inside a UserControl. Content> </ContentPresenter> As you see ContentPresenter is center-aligned. Ask Question Asked 11 months ago. " This worked for me: I have a general question about WPF performance. In your first sample you override Style, in the second one - DataTemplate. merged columns as headers in excel). wpf; layout; contentpresenter; or ask your own question. Related. ContentPresenter issue. " This explains why bindings don't really work with ContentPresenter, the source is always wrong. xaml I added the In WPF Content Presenter is a control that displays a single piece of content. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Now I have a ContentPresenter and define the Margin on all UserControls that can be part of this ContentPresenter. Like Markus Hütter said, the problem is probably that you have an implicit Style for a TextBlock defined and when the Button Content is set to a string, a TextBlock will be created where you have the ContentPresenter in the Template. The Arrangement pass is simply, just laying out the items in order. Performance improvement in . VirtualizingPanel. Now i have a requirement where i need to change the style of tabitem in my dialog window and set foreground based on few triggers,i have defined my own textblock style and written template for tabitem and textblock as below- WPF offer container recycling, you may perhaps leverage that to minimize the view creation hence a little gain in performance since the containers will be reused. To address the OP's question directly - the {Binding HasValue} trigger does not work, because ContentPresenter. All a user control is (at least it terms of XAML and its template), is a Border with a ContentPresenter inside it. (3) A DataTemplate for the ViewModel that will be bound to the ContentPresenter referenced above. (Inherited from UIElement) ArrangeCore(Rect) Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Thanks to this Gist by James Nugent: "WPF style which puts character ellipsis on button contents without replacing the ContentPresenter with a TextBlock and thus losing the ability to support access keys. Note that if it is a child of e. When i changed one cell all ok, but when i scrolling to end of datagrid, return back and trying to change one cell, another one is The largest performance gains come from reducing layout structure that's repeated in the UI, like in a ListView Grid, StackPanel, RelativePanel, and ContentPresenter controls have built-in border properties Now, my actual problem: My "m_Employees" list is returning about 500+ employees from the database, so the collection is slightly big. – I want to get all the UI-items from an ItemsControl. Has anyone encountered a problem like this? WPF - ContentPresenter won't display Content. – Firstly it is not a good idea of putting a ContentPresenter inside of a TextBox . x:Bind : : : x:Bind; has also become a powerful feature of UWP over WPF. Your first problem is that you set an absolute size for your ContentPresenter (in general, in WPF, you avoid absolute sizes and absolute positions for controls, but it's a hard habit to break when you are coming from WinForms). Discover step-by-step instructions for integrating real-time data visualization, including 2D and 3D charts, synchronized modifiers, and custom legends to track well parameters, drilling depths, and equipment performance in the energy sector. Everything is fine for short contents but when the content is multi-lined, Left-aligned Text sits in the center of the checkbox. UPDATE: I've also attempted (among many things) putting the ContentPresenter in a MenuItem, like this: My custom control is derived from ContentControl and has an additional dependency property 'AdditionalContent' of type FrameworkElement. I have the following components in a WPF application: (1) Window (2) ContentPresenter in the Window that is bound to a property in the underlying ViewModel. "> <ContentPresenter x:Name="PART_Header" Margin="0 Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog The Performance Disappointment Hidden Loops Using Value Converters Watch Out for Freezables! An Intermediary Presenter Custom Data Element Biting the Bullet The DrawingVisual Solution. Provides a framework for Panel elements that virtualize their child data I am planning to give RadTabcontrol a try and use iscontent preserved proerty, but before i do that i wanted to find out what are the pros/cons of using iscontent preserved, according to your documentation "For performance optimization the ControlTemplate of the RadTabControl defines a single ContentPresenter which holds only the currently WPF ContentPresenter content not inheriting DataContext. NET 4. Another really important aspect to consider when comparing performance between WPF and winforms from a data-centric perspective is, as mentioned above, UI Virtualization. 6. I have am attempting to build a tree view where: 1. The UI freezes for about 3 seconds, but only when the app first starts up Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I made datagrid based on wpf datagrid. From this post How do I access the children of an ItemsControl? I copied an answer and it works so far. 14. Setting Datacontext on contentpresenter: Binding inside ContentTemplate is not The ContentTemplate property wraps the Content object. Learning. This technique becomes even more useful A quick post here about using a ContentPresenter (or a ContentControl which uses a ContentPresenter in its template) with its Content property. Modified 11 months ago. Displaying large data sets. My initial thoughts were to do this: <ContentControl x:Name="ContentElement" WPF ContentPresenter inside an ItemsControl. In the following XAML, I am trying to bind the various DataTemplates directly to the Grid ContentPresenter. The Overflow Blog “You don’t want to be that person ContentPresenter uses template binding to get and display custom content. Commented Oct 27, 2017 at 13:42. A ContentPresenter is normally used when restyling existing controls. Provides a framework for Panel elements that virtualize their child data I have am attempting to build a tree view where: 1. Without the custom ItemContainerStyle everything works WPF 4 ContentPresenter TextWrapping style is not applied to implicitedly generated TextBlock. If the ContentPresenter is found, the template automatically binds the control's Content property to the ContentPresenter. WPF - ContentPresenter won't display Content. with filters) is In this article. bjgzkfsvg hmm ibpa nusn meucdp qrvu hwgkycd eqm gwfh yvmtl