I post a question i have one field loan in that i have to type only numbers not characters

Question

I post a question i have one field loan in that i have to type only numbers not characters.

Loan 1000.

you posted answers as follows

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
  {
 
  if (!System.Text.RegularExpressions.Regex.IsMatch(e.KeyChar.ToString(), "\\d+"))

  e.Handled = true;
  }

in that i click  a loan text box

private void txt_loan_TextChanged(object sender, EventArgs e)

only text changed only there.not key press event.


what to do. 

above one i am creating in vb.net using csharp. it is a window application.help me wat to do.

 private void txt_others_TextChanged(object sender, EventArgs e)
        {
            int a, b, c, d;


            if (!int.TryParse(txt_gross.Text, out a) || a < 0)
            {
                MessageBox.Show("Not a valid number. Please reenter.");
                txt_gross.Focus();
                return;
            }


            if (!int.TryParse(txt_totdeductions.Text, out b) || b < 0)
            {
                MessageBox.Show("Not a valid number. Please reenter.");
                txt_totdeductions.Focus();
                return;
            }


            if (!int.TryParse(txt_others.Text, out c) || c < 0)
            {
                MessageBox.Show("Not a valid number. Please reenter.");
                txt_others.Focus();
                return;
            }


            d = a - b + c;
            txt_totpayable.Text = d.ToString();


        }


in that onlytext changed only there.not key press event.how to do.please send the code.urgent.
Regards,
Narasiman P