Question

I am opening a file using the OpenFileDialog in c# and I am noticing it is taking between 20-40 seconds to load my file and clear the dialog.

Here is my sample code:

private void btnOpen_Click(object sender, EventArgs e)
{
    if (ofdSettings.ShowDialog() == DialogResult.OK)
    {
         // do nothing
    } 
}

even with this limited example it takes the 20-40 second duration for the dialog to clear.
the file i’m selecting is a xml file that is only 1.36kb large

Answer 1

I had the same problem, openFileDialog1.ShowDialog() was slow, taking 10 seconds after closing it to execute the next line of my program.
I noticed in the dialog that I had a couple old shortcuts under “Computer” pointing to webdav url’s which were no longer valid. I deleted these shortcuts from windows explorer, and the program is fast now.
Check if you have any network connection shortcuts tied to your computer, which also display in the dialog (on the left-hand panel in Windows 7). Try removing them and see if the dialog is faster.