validate a textbox that should allow only numbers

Hi friend,

use the below code

 try
            {
                if (txtage.Text != "" && txtage.Enabled)
                {
                    Convert.ToInt32(txtage.Text);
                }
            }
            catch (Exception ex)
            {
                RadMessageBox.Show("enter valid data");
                txtage.Text = "";
            }

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you can use MaskedTextBox control..

or

        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            int charCode = Convert.ToInt32(e.KeyChar);
            if (charCode == 3 || charCode == 22)
            {
                MessageBox.Show("Copy/Cut Paste not allowed");
                e.Handled = true;
            }

            if (char.IsDigit(e.KeyChar) == false & char.IsControl(e.KeyChar) == false)
            {
                e.Handled = true;
                MessageBox.Show("Not Valid Entry !", "Validion", MessageBoxButtons.OK);
            }
        }

you need to split the data and use "\n" for break line.

label1.Text = "apple\nboy\ncat\ndoll";