Developer technologies | Windows Presentation Foundation

UCEERR_RENDERTHREADFAILURE (0x88980406) when multiple processes of the same WPF application are open.

Hello! Application: My application draws a huge number of OrderBooks (https://www.investopedia.com/terms/o/order-book.asp), for this my hierarchy looks like this: MainWindow -> TabControl -> TabItem -> DockingManager -> DockPanel. In…

What would be the appropriate method for view models in a C# WPF project?

Hello I created record insertion and update view models in my c# wpf project. These view models have common save and cancel commands. When the save command is clicked, it calls the save function from the relevant service and if there are any error…

Multiple HTTPs Requests

Hello All, We have a WPF application built on .Net Framework 4.8. This application communicates with an HTTPs server to perform a list of commands. These commands must be executed one after another and must not be sent in on go. This communication is…

I want to disable/enable usb and HDMI port whenever my c# wpf (.net Framework 4.7.2) app runs.

Online resources are not present for above queries. I want solution for both admin/non-admin user account. Please help to provide me the solution.

Developer technologies | Windows Presentation Foundation

Developer technologies | Windows Presentation Foundation

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Windows development | Windows API - Win32

Windows development | Windows API - Win32

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Developer technologies | .NET | Other

Developer technologies | .NET | Other

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Developer technologies | C#

Developer technologies | C#

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I run in a trouble. WPF, compiled XAML: on changed text handler run but not all controls initizlzed

How to Design Validation, Error Management, and Message Service in a Layered Architecture for a WPF Project?

Hello I am working on a WPF application using the MVVM pattern and performing validations through a centralized ValidationService that leverages FluentValidation. During the validation process, I need to check whether an ISBN already exists in the…

I want to enable/Disable (i.e. lock/unlock) the Bluetooth through the C# wpf Application

Hi I want to enable/disable the Bluetooth programmatically in c# .NET WPF app. I am not able to find correct implementation. Pls help.

How to use WPF Mouse.OverrideCursor in a VB.NET application

I tried a sample WPF code, that Kareninstructor recommended to me, from https://github.com/karenpayneoregon/visual-basic-getting-started/tree/master/ChangeCursor to test the usage of Mouse.OverrideCursor - this worked beautifully. However, it is a…

How to convert outlook email (.msg) to pdf c# ?

Are there any free libraries using which I can convert outlook emails i.e. .msg files to pdf in my WPF c# app? I've tried using PDFSharp like below but the data is not showing properly at all. The email body contains tables and text and sometimes it may…

Dependency Properties in User Controls

I have a simple Slider and Label user control that I load into my window and I want to change the following properties using databinding from the main window. Slider Properties -> Value, SelectionStart, SelectionEnd (all doubles) Label Properties…

How to implements desing time adorner for WPF?

I want to provide design-time support for my user control in WPF. I found out about adorners, but unfortunately, I could not implement them (In design time). I used this walkthrough, but it is old and no longer being updated. I would appreciate any help…

How to Apply Multiple Filtering Criteria in a CustomObservableCollection?

Hello I am managing data in my WPF application using a CustomObservableCollection. I created a custom collection by inheriting from ObservableCollection in order to control any additional operations that might arise on the collection in the future. Now,…

Unable to detected visibility of Onscreen keyboard using user32.dll

Below code is always showing on screen keyboard as visible. Even if it is closed. using System; using System.Diagnostics; using Microsoft.Win32; using System.Runtime.InteropServices; using System.Threading; namespace CSharpTesting { class Program …

Advice on Signing and Certificate Options for a WPF Project

Hi, I have a WPF project based in Dublin, initially intended for approximately 100 users in Ireland, with plans to expand both inside and outside the EU over the long term. The business was established in September 2022. I’d like advice on the best…

RenderTargetBitmap.Render() creates blank image when element present in Grid.Row = "1"

Save element (inherited from System.Windows.Controls.Control) as image using below code. RenderTargetBitmap bmpSource = new RenderTargetBitmap((int)element.ActualWidth, (int)element.ActualHeight, 96, 96, PixelFormats.Pbgra32); …

Getting security warning Unknown publisher issue while install the .exe or update the application using click once

Dear Support, I have created a Windows application using WPF and deployed it to a server location using Click-Once. It was properly digitally signed and used by everyone in the organization. However, recently we have started getting the "Unknown…

After migrating to VB.NET Core 9.0 from 8.0, I am getting error messages on menu bindings

After migrating from version 8.0 to version 9.0, I am getting error messages related to the binding of menu items. I am working with Visual Studio 17.12.3 and .NET Core 9.0.101 on a Windows 11 (23H2) machine. Further down in the XAML code, I have the…

Why does BackgroundWorker.RunWorkerCompleted +=OnRunWorkerCompleted event not get called?

Our application uses the WPF and .NET Framwork 4.8 The AbortableBackgroundWorkder class inherences from the BackgroundWorker class and used as following. ProtocolProcessor class performs complicated sequence instrument control actions. we notice that…

Enable recovery using ReagentC using Csharp or bat file

Hello All, Morning: I would like to enable recovery using ReagentC in my windows LTSC 21H2 19044.5131 system using C# application so i set the app manifest by default launch ad admin. I tried to launch the the batc file via this application but recovery…

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Windows for business | Windows Client for IT Pros | User experience | Other

Windows for business | Windows Client for IT Pros | User experience | Other

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How to get DataGrid object of TabControl.ContentTemplate

Dear all, I have a control using ContentTemplate and i would like to binding the Visibility properties with viewModel but that error 'Cannot find governing FrameworkElement or FrameworkContentElement for target element'. This is control in xaml: …