how to make a text box only to accept numbers in c# for windows web store application using blank template

Question

I am creating a windows store app in visual studio 12 , I am using c# language ,i have a text box ,but how to make it to accept only numbers ,if user tries to entry any other value than the number it should show an error message

Answer 1

You can simply use try and catch like in following example:

private void textBox1_TextChanged(object sender, EventArgs e)
    {

        int num;

        try
        {
            num = int.Parse(textBox1.Text);  //here's your value
            label1.Text = num.ToString();
        }

        catch (Exception exc)
        {
            label2.Text = exc.Message;
        }
    }