openFileDialog.ShowDialog() didnt show dialog

Question

I try to open System file dialog to select a pic. the code ran normally in my computer. But in another computer cant show the system file dialog.

And here is my simple code:-

private void PicInputBtn_Click(object sender, RoutedEventArgs e)
{
    var dialog = new Microsoft.Win32.OpenFileDialog
    {
        DefaultExt = ".jpg",
        Filter = "img file|*.jpg",
    };

    if (dialog.ShowDialog() != true)
    {
        return;
    }
｝

Have you already tried the answers in this similar question? http://stackoverflow.com/questions/2201227/c-wpf-openfiledialog-does-not-appear ? — Sosian, Jun 29 '16 at 08:16
Look at event viewer > windows logs> application. There should be an error log — osmanraifgunes, Jun 29 '16 at 08:16
@Sayse The `Microsoft.Win32.OpenFileDialog` returns a `bool?`. The code is ok. You are thinking of the `System.Windows.Forms.OpenFileDialog` — Manfred Radlwimmer, Jun 29 '16 at 08:16
This is code from Microsoft : https://msdn.microsoft.com/en-us/library/microsoft.win32.openfiledialog(v=vs.110).aspx — , Jun 29 '16 at 08:27

Quentin Roger · Answer 1 · 2016-06-29T08:53:12.377

1

If nothing happens but the mouse pointer turning into a little busy-indicator.

You can try to set your thread to STAThread:

[STAThread]    
static void Main(string[] args)
{
    var o = new OpenFileDialog();
    var r = o .ShowDialog();
}

Howover they are many reasons that can break the OpenFileDialog, you can try to launch your program in admin mode and try to reinstall .net Framework

edited Jun 29 '16 at 08:53

answered Jun 29 '16 at 08:48

Quentin Roger

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score 0 · Answer 2 · 2016-06-29T08:23:11.093

0

Change your code to:

private void PicInputBtn_Click(object sender, RoutedEventArgs e)
{
    var dialog = new Microsoft.Win32.OpenFileDialog
    {
        DefaultExt = ".jpg",
        Filter = "img file|*.jpg" // You had an extra ',' here.
    };

    if ((Nullable<bool>dialog.ShowDialog()) == true) // Also you forgot to put Nullable<bool>
    {
        // string filename = dlg.FileName;
    }
    else
    {
        return;
    }
｝

edited Jun 29 '16 at 08:23

answered Jun 29 '16 at 08:18

Maybe not the code question,I ask my teammate to download the win7 sp1 patch and her computer can show the OpenFileDialog correctly! anyway,still thanks for your anwser!!! – Fireyu Jun 29 '16 at 09:39
@Fireyu That's okay. – Jun 29 '16 at 09:42

openFileDialog.ShowDialog() didnt show dialog

2 Answers2