Validating Textbox(only except numbers or letters)

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What's the easiest way to validate a textbox so that the textbox can only except numbers? And an other textbox only except letters?

Posted 2-Mar-12 0:20am

JacoBosch

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2 solutions

Solution 2

The following are some of the alternatives

1. Use MaskedTextBox (this is easiest approach) explained here
http://msdn.microsoft.com/en-us/library/system.windows.forms.maskedtextbox.aspx[^]
2. In the KeyPress event if the Key pressed is not the required character then set e.Handled = true
3. In the KeyDown event if the key pressed is not the required character then set
e.SuppressKeyPress = true

Posted 2-Mar-12 0:31am

ProEnggSoft

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JacoBosch · Accepted Answer · 2012-03-02T00:25:00

Solution 1

Keypress event on the textbox

C#

private void txtSimnr_KeyPress(object sender, KeyPressEventArgs e)
        {
       if (!char.IsControl(e.KeyChar)
       && !char.IsDigit(e.KeyChar)
       && e.KeyChar != '.')
            {
                e.Handled = true;
            }

        }

Posted 2-Mar-12 0:25am

JacoBosch

Updated 2-Mar-12 0:26am

v2