C#, WPF - OpenFileDialog does not appear

Question

I have been searching up and down the web and unfortunately never came across an issue quite like mine, so here goes:

My C# WPF application won\'t show me no OpenFil

Answer 1

Not sure if you figured it out or not, but I recently had this same problem. In my case, the problem was that my application hadn't established an existing window.

My code looked something like this.

private void Application_Startup(object sender, StartupEventArgs e) {
    string startupFileName = String.Empty();
    if ( startupMode = StartupMode.Load ) {
        // open existing file
        OpenFileDialog openDlg = new OpenFileDialog();
        if (openDlg.ShowDialog() != true)
             return;
        startupFileName = openDlg.FileName;
    } else {
        // create a new file
        SaveFileDialog saveDlg = new SaveFileDialog();
        if (saveDlg.ShowDialog() != true)
             return;
        startupFileName = saveDlg.FileName;
    }

    // show my main application window
    MainWindow myMainWindow = new MainWindow(startupFileName);
    myMainWindow.Show();
}

The OpenFileDialog (or SaveFileDialog) would immediately return false without showing because my application had no window for it to attach itself to.

My solution was to put the open/save code after I created my main window but before I called the Show() method.