WPF blazor hybrid application with console output window

Question

I am following the guid in learn.microsoft.com to develop a .net8 WPF blazor hybrid app. Here is the link.

I build and run the WPF application successfully according to this guid. However, I can`t make the WPF with a Console window even if I set the following attributes to csproj. It will cause a build error.

    <OutputType>Exe</OutputType>
    <DisableWinExeOutputInference>true</DisableWinExeOutputInference>

I have achieved this successfully in my other normal WPF applications. Could you let me know if it is possiable to add the console output window to the WPF/blazor hybrid project in .net8?

Thanks!

Answer 1

Hi,@William Liu. Welcome to Microsoft Q&A.

In a .NET 8 WPF Blazor hybrid application, adding a console output window directly to the WPF part of the project might not be straightforward due to the nature of the Blazor hosting model.

You could try to redirect the standard output stream to a console window in a WPF application and see if that helps.

In the App class constructor:

using System;

using System.IO;

using System.Runtime.InteropServices;

using System.Windows;

namespace YourNamespace

{

    public partial class App : Application

    {

        [DllImport("kernel32.dll")]

        private static extern bool AllocConsole();

        protected override void OnStartup(StartupEventArgs e)

        {

            base.OnStartup(e);

            // Allocating a console window

            AllocConsole();

            // Redirecting standard output stream to the console

            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });

        }

    }

}

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Answer 2

see this thread to capture webview2 console output. You would put the code in the blazor hosting app, not the blazor code:

https://github.com/MicrosoftEdge/WebView2Feedback/issues/2982