My WPF Application cannot locate resource 'Mainwindow.xaml'

Question

I have been working on a WPF application using vb.net and I've recently run into a problem.

When I build my code, the build is successful but when it comes to running the code the System.IO.IOexception throws an exception "Cannot locate resource ViewModel/ViewModel/Mainwindow.xaml" The .Xaml windows are located in a folder called ViewModel hence I don't know where the other ViewModel/ViewModel... path is coming from, isn't it supposed to be viewModel/MainWindow.Xaml? I have tried all possible solutions including cleaning up the Project but it doesn't seem to work.

The only solution that seems to work is if I change the StartupUri from StartupUri = "ViewModel\MainWindow.Xaml" TO StartupUri = "...\MainWindow.xaml" but I doubt if that is the right thing to do.

Answer 1

Change the StartupUri="MainWindow.xaml" to StartupUri="FolderName/MainWindow.xaml"

Solved my problem, when I moved my MainWindow to the View Folder

Answer 2

In my case I needed to use pack URI syntax to set SrartUpUri property of my App.xaml file to point to a new location of my MainWindow.xaml, as so:

   <Application x:Class="TrafficLights.Controller.App"
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                StartupUri="pack://application:,,,/View/MainWindow.xaml">

More on pack URIs here:

http://msdn.microsoft.com/en-us/library/aa970069(v=vs.110).aspx

Hope it helps. Good luck!

Answer 3

This happened to me few times - always when I moved MainWindow.xaml to different folder and forgot to update StartupUri in App.xaml.

Answer 4

Visual Studio has somehow renamed my MainWindow.xaml to MainWindow(1).xaml, so again I renamed it to MainWindow.xaml