Question

I am playing with a Silverlight control that has a TextBox and Button. When I click the button (which calls SelectText below), I want to select all the text in the textbox.

Here’s my code:

    private void SelectText()     {         TextBox tb = this.txtFirstName;         tb.SelectionStart = 0;         tb.SelectionLength = 3;         // tb.Select(0, this.txtFirstName.Text.Trim().Length - 1);         // tb.SelectAll();         // tb.Text = String.Empty;     } 

The commented code is what I tried already, but neither is working.

Anyone have suggestions on what I’m doing wrong?

Answer 1

You might need to give focus to the textbox to see the actual selection happening (either before or after selecting, it might not matter but you’ll have to try):

private void SelectText()     {         TextBox tb = this.txtFirstName;         tb.SelectionStart = 0;         tb.SelectionLength = 3;         // tb.Select(0, this.txtFirstName.Text.Trim().Length - 1);         // tb.SelectAll();         // tb.Text = String.Empty;         tb.Focus();     }