Wpf – No creation of a WPF window in a DLL project

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Is there a reason why Visual Studio won't let me create a WPF window in a DLL project?

I "solved" it by creating a window in an Application Project and copying it to my DLL project.
I also found that I could just create a UserControl and change the base class to "Window".

But if I had to do it this way, it's maybe because I shouldn't do it…

Best Answer

Make sure the project type is WPF User Control Library when you create your project.

If it isn't then no sweat, just edit the csproj file and make sure the <ProjectTypeGuids> element under Project/PropertyGroup contain the following GUIDs

<ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>

Also, make sure you reference PresentationFramework and System.Xaml in your project, or you will not get any WPF in your code.

Related Solutions

Wpf – Why doesn’t Visual Studio want me to add a new window to the WPF project

Your project is probably configured as a WinForms project, or possibly as a class library. If it's created as either of these, you are only able to add a WPF UserControl, unfortunately.

Of course, there's no technical reason for this limitation, so you can copy/paste one from another project or recreate/change your project to be a WPF project.

I'm not sure what you change exactly to make it a WPF project in VS's eyes. You might try creating a new project and diffing it to your current project. You will most likely have to do some text editing on your .csproj file.

R – All keys don’t work in a WPF window when it is calling from a WinForm project

When creating your WPF window from your Winforms code, be sure to use ElementHost.EnableModelessKeyboardInterop to allow WPF input to work.

Example:

Window window = new Window1();
ElementHost.EnableModelessKeyboardInterop(window);
window.Show();

Best Answer

Related Solutions

Wpf – Why doesn’t Visual Studio want me to add a new window to the WPF project

R – All keys don’t work in a WPF window when it is calling from a WinForm project

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