limiting tokens in radautocompletebox

[ahmed]

I want to limit the numbers of tokens the user can add to the box to 1 token item only after that he can't enter any more letters

[Dimitar]

Hi Ahmed,

You can use the KeyPress event and check the items count:

private void RadAutoCompleteBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    var el = sender as RadAutoCompleteBox;
    if (el.Items.Count > 0)
    {
        e.Handled = true;
    }
}

Should you have any other questions do not hesitate to ask.

Regards,
Dimitar
Progress Telerik

[ahmed]

it works but the user can still paste text through Ctrl + v , Shift + INSERT and right click paste option how to stop the user from doing so ?

[Dimitar]

Hello Ahmed,

To handle these cases you can use the TextChanging event. The following example allows you to delete the existing token only:

private void RadAutoCompleteBox1_TextChanging(object sender, Telerik.WinControls.TextChangingEventArgs e)
{
    if (e.NewValue == "")
    {
        return;
    }
    var el = sender as RadAutoCompleteBox;
    if (el.Items.Count > 0)
    {
        e.Cancel = true;
    }
}

Should you have any other questions do not hesitate to ask.

Regards,
Dimitar
Progress Telerik