System.NullReferenceException: 'Object reference not set to an instance of an object.' when navigating to page in WinUI
I am working with a WinUI project which is built based on the MVVM Toolkit template. When I use NavigationService.NavigateTo(typeof(EmployeeViewModel).FullName!); to navigate to EmployeePage, the program crashes with the bug that…
Editor controls in grid don't resize correctly after grid and row compressed to zero width and expanded back
Editor controls in a 3x3 grid don't resize correctly after compressing one of the rows and columns to 0 width and height and expanding it back to normal size. The bug is only present on the windows platform using Editor controls. Resizing works correctly…
Sometimes click something in The WebView2 Page will open a new Microsoft Edge Window,could we show it in the Webview2 replace open a new window?
With local file WebView2: var env = await CoreWebView2Environment.CreateAsync(WebViewRuntimeFolder, DataFolder, opt)); await webView.EnsureCoreWebView2Async(env); I want whatever you click in the WebView2,The requested showed in the WebView2 Element,…
How to change tabbar style (font and size and ...)
i want change the style of tabbar menu item font and size and color how to do it ? AppShell <TabBar > <Tab Title="پروفایل" > <Tab.Icon> <FontImageSource FontFamily="MDReg"…
Double tapping Editor control locks app when deployed to iOS
Double tapping the Editor locks the app when deployed to iOS. This occurs for both net 8 and 9. Entry control works well and does not lock up the app. I added Editor and Entry controls to the demo Maui app as below. Am I missing a setting? Any known…
How fix System.ArgumentNullException
L'erreur complet : System.ArgumentNullException HResult=0x80004003 Message=Value cannot be null. Arg_ParamName_Name Source=Microsoft.EntityFrameworkCore Arborescence des appels de procédure : à…
High RAM Usage with Custom Splash Screen in WPF (Code-Behind, .NET Core 6) - How to Reduce Memory Consumption?
I'm working on a WPF application using .NET Core 6 (Code-Behind, no MVVM) in Visual Studio 2022 on Windows 10. I've created a customized splash screen that displays a GIF on startup. The splash screen closes once the app has fully loaded. My problem is…
Crash issue from Microsoft official Win32 C++ custom WinRT XAML control tutorial
Build was ok, but got a crash after following the official Microsoft official Win32 custom WinRT XAML control tutorial https://video2.skills-academy.com/en-us/windows/apps/desktop/modernize/xaml-islands/host-custom-control-with-xaml-islands-cpp: Clicking…
[UWP] Change Lottie Animation Color / Theme Dynamically
I have used lottie json animation in xaml uwp using "CommunityToolkit.WinUI.Lottie" and "AnimatedVisualPlayer". But for dark theme I can not see the lottie animation as the color is fixed. How can we dynamically change color of…
How to build an application correctly in the WinUI3 project template?
I am working in the Blank App, Packaged (WinUI 3 in Desktop). When compiling and launching a new project in Visual Studio using the keyboard shortcut "Ctrl + F5", the application opens without problems. However, when building the project and…
How to Extend TextBox's Text Property to Show Binding Value in the Properties Window without XAML Updates?
I am working with WPF and trying to extend the functionality of a Text property in the Properties in the design mode in the TextBox, but I’m running into limitations with the Text property. Here’s what I want to achieve: In WPF, when Text has Binding,…
WPF TextBox Style Customization: CaretBrush Disappeared After Trigger Setup
Seeking assistance with customizing the style properties of a TextBox in WPF: Background: MouseOver #505050 & not MouseOver #303030 Foreground: #FFFFFF BorderBrush: MouseOver #868686 & not MouseOver #666666 CaretBrush Despite setting up…
search code does not execute (xaml page,pagemodel or MVVM )
I'm trying to add a search bar to my app, but can not get the code to execute. I've placed breakpoints in the pagemodel but they are tripped. Xaml: <SearchBar x:Name="searchBar" HorizontalOptions="Fill" …
How to flatten the XML
Hi have a complex XML structured as per attached below. How can I flatten the XML using XSLT? I have attached the expected sample flatten xml(expected_ouput_flat_oder_xml.xml) based on the complex xml(Order_xml.xml) I provided. I have tried using the…
How to create Custom Window Style in WPF [Drag Window]
Hi To All, How to create Custom Window Style in WPF with Drag-able window
How to view all Visual Tree UI elements of any UI controls, Which is using styles & templates on windows 11 OS environment using VisualUIAVerifyNative tool?
VisualUIAVerifyNative is not displaying few UI elements If TextBox uses style, which has TextBlock as PlaceholderText, then the placeholder textblock UI element is not getting displayed in VisualUIAVerifyNative on windows 11 machine <Style…
UWP Windows.System.Launcher.LaunchUriAsync is not opening correctly in browser when the URI supports opening the link in other uwp app and browser.
Hi I'm using Windows.System.Launcher.LaunchUriAsync to open a URI, I'm prompted with a dialogue when the URI can be opened in other uwp app and browser. If chosen browser, it opens the local path - AppData/Local/Microsoft/Windows/INetCache instead of…
How Can I call RuntimeHostConfigurationOption OnStartup of a WPF (C#) application in .NET 8?
Hi there, I have a WPF application where the UI is a very important thing and heart of the application. Due to some UI elements requirements I have some custom RuntimeHostConfigurationOption which I put in my WPF application through the *.csproj file. I…
is there any roundabouts for design tab in .net maui?
Hello, I'm just started to study .net maui but I stuck on UI design in .net maui project. In WPF project, I could use design tab to correct UI easily. but I can't use that in .net maui. is there anyone or site to teach how to design UI in .net maui…
Unable to make full screen splash in .NET MAUI
How can I make splash to display in full screen instead of just at the center of the mobile screen in .NET MAUI? I've tried different base sizes, but not working. Target android version up-to 13. <ItemGroup> <MauiSplashScreen…