Question

I have written following code on Textbox Validated event :

 private void txtHbhakt1_Validated(object sender, EventArgs e)
        {

              //MessageBox.Show("Validated");
            txtHbhakt1.AutoCompleteCustomSource.Add("abcd");
            txtHbhakt1.AutoCompleteCustomSource.Add("abcd1");
            txtHbhakt1.AutoCompleteCustomSource.Add("abcd2");
            txtHbhakt1.AutoCompleteCustomSource.Add("abcd3");           

        }

i run the application and Hit TAB Key on Textbox.. it happens nothing.. why?
whenever i use autocompleteCustomSource on Validated or Leave event of Textbox TAB key doesn’t working ..
what is the solution?

Thanks..

Answer 1

The Tab key action seems to get conflicting orders when you are updating the custom source during the validation event.

A simple work around is to add the sources after the event has passed. Using BeginInvoke seems to fix the problem:

void txtHbhakt1_Validated(object sender, EventArgs e) {
  BeginInvoke(new Action(() => txtHbhakt1.AutoCompleteCustomSource.Add("abcd")));
  BeginInvoke(new Action(() => txtHbhakt1.AutoCompleteCustomSource.Add("abcd1")));
  BeginInvoke(new Action(() => txtHbhakt1.AutoCompleteCustomSource.Add("abcd2")));
  BeginInvoke(new Action(() => txtHbhakt1.AutoCompleteCustomSource.Add("abcd3")));
}