Question

I am developing a windows phone app. I want to get the value of the key in which the user is pressing. I want check wheather it is a digit or any other alphabet or special charater. Because my text box is using for entering currency. So I need to prevent users from entering alphabets or any special characters. Only digits are allowed to enter.

Answer 1

This is how I usually reject keystrokes

private void TextBox_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Key == Key.D1)
    {
        // reject this key and do not show in textbox
        e.Handled = true;
    }
}

Edit: See How to create a numeric textbox in Silverlight? for a more through implementation.