Left-button click for Silverlight TextBox

Question

I need TextBox that supports double click, but while trying to code it, i stuck with a problem that Silverlight textbox doesn't raise left-button mouse events if i click inside of text area. So what are possible solutions here? I'm using Silverlight 4.

Answer 1

You should create a custom textbox control that inherits from the default TextBox and override the OnMouseLeftButtonUp method, like this:

public class MyTextBox : TextBox
{
    protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
    {
        base.OnMouseLeftButtonUp(e);
        // Do your stuff here
    }
}

If you need to handle the double click, it would be easier to switch to Silverlight 5 that introduced the concept of a click count. Here is a tutorial for handling the double click: http://www.silverlighthostingnews.com/index.php/archives/440 Basically you will just have to do this:

if(e.ClickCount == 2) {...}

EDIT: here is how to do in Silverlight 4:

• Create the custom textbox that inherits the default TextBox class and override the mouse events like so:

-

public class DoubleClickTextBox : TextBox
{
    protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
    {
        // Do nothing
    }
    protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
    {
        // Do nothing
    }
}

• Add the DoubleClickExtender class in your project class.

• In your code-behind, attach to the double click event:

-

DoubleClickExtender dce = new DoubleClickExtender(textBox, 300)
dce.DoubleClick += new MyEventHandler(dce_DoubleClick);