Question

I have the following code in my TextBox leave event:

private void txtAmount_Leave(object sender, EventArgs e)
{
   int x = Convert.ToInt32(txtAmount.Text);
   double res = (double)x / 100;
   txtAmount.Text = "$" + res.ToString();
}

But if move back to the previous control by hitting Shift+Tab and again moving back to the same textbox and then trying to move to other the form is getting closed automatically. Why does this happen?

Answer 1

I got the solution

      private void txtAmount_Leave(object sender, EventArgs e)
    {
        string strAmnt = string.Empty;
        strAmnt = txtAmount.Text;
        if (strAmnt.Contains(".") && !strAmnt.Contains("$"))
        {

            txtAmount.Text = "$" + strAmnt;
            while (txtAmount.Text.Length - txtAmount.Text.IndexOf(".") <= 2)
            {
                txtAmount.Text += "0";
            }
        }
        else
            if (strAmnt.Contains("$") && !strAmnt.Contains("."))
            {
                Int64 amnt = 0;
                strAmnt = strAmnt.Replace("$", "");
                try
                {
                    amnt = Convert.ToInt64(strAmnt);
                    double amt = (double)amnt / 100;
                    txtAmount.Text = "$" + amt.ToString();
                }
                catch (FormatException ie)
                {
                    MessageBox.Show("Invalid Format");
                }
            }
            else
                if (!strAmnt.Contains(".") && !strAmnt.Contains("$"))
                {
                    try
                    {
                        int x = Convert.ToInt32(txtAmount.Text);
                        double res = (double)x / 100;
                        txtAmount.Text = "$" + res.ToString();
                        while (txtAmount.Text.Length - txtAmount.Text.IndexOf(".") <= 2)
                        {
                            txtAmount.Text += "0";
                        }
                    }
                    catch (FormatException ie)
                    {
                        MessageBox.Show("InvalidFormat");
                    }
                }
        while (txtAmount.Text.Length - txtAmount.Text.IndexOf(".") <= 2)
        {
            txtAmount.Text += "0";
        }
    }