Dialogs must be user-initiated. Silverlight

问题

I have read almost all SO threads about this error. What i found is that Openfiledialog must be the first line of Button Click Handler in code behind file of your view.

I have done this but still i got this error on random.

Dialogs must be user-initiated.

at System.Windows.Controls.OpenFileDialog.ShowDialog()
at Portal.Presentation.SL.Views.AddEditPatient.Button_Click(Object sender, RoutedEventArgs e)

any pointers? I am using silverlight 4

Regards.

来源：https://stackoverflow.com/questions/10105197/dialogs-must-be-user-initiated-silverlight