dotnet windows forms: NullReferenceException from FolderBrowserDialog -- dotnet windows forms

NullReferenceException from FolderBrowserDialog

ondrej421
4/22/2008 4:53:00 PM

dotnet windows forms:

Hi there,

My application, which uses the FolderBrowserDialog, sometimes throws a
NullReferenceException with the following call stack when calling
FolderBrowserDialog.ShowDialog():

at
System.Windows.Forms.UnsafeNativeMethods.Shell32.SHBrowseForFolder(BROWSEINFO
lpbi)
at System.Windows.Forms.FolderBrowserDialog.RunDialog(IntPtr hWndOwner)
at System.Windows.Forms.CommonDialog.ShowDialog(IWin32Window owner)
...

Any ideas what could be causing this?

Re: NullReferenceException from FolderBrowserDialog

Scott M.
4/22/2008 8:29:05 PM

It is most likely caused when no file is selected and the OK button is
pressed or when the cancel button is pressed. You must code for these two
possibilities.

-Scott

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