c# - OpenFileDialog.ShowDialog() raises InvalidOperationException in Silverlight -

below code snippet.

openfiledialog dialog = new openfiledialog() {     filter = "excel files (*.xlsx;*.xls;)|*.xlsx;*.xls;", };  if (dialog.showdialog().value == false) {     iscommiting = false;     return; } else {     items.clear(); } 

when dialog.showdialog() called, invalidoperationexception raised message "showdialog failed.".

i've found related article google search. http://social.msdn.microsoft.com/forums/en-us/silverlightmvvm/thread/6ae9454b-b5ba-4286-959f-6dc4d347ebf7/

this article multi-selection in open file dialog. didn't set multiselect property true. problem doesn't happen often, , cannot reproduced.

is there suffered same problem?

can try:

openfiledialog dialog = new openfiledialog() {          filter = "excel files (*.xlsx,*.xls)|*.xlsx,*.xls" };  if (dialog.showdialog() == false) {     iscommiting = false;     return; } else {     items.clear(); }