Validation of Textbox

Question

I have the following piece of code that limits a TextBox receivable only numbers and comma:

private void txtTempoAcel1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (!Char.IsDigit(e.KeyChar) && e.KeyChar != (char)8 && e.KeyChar == 48)
        e.Handled = true;
}

But I have several TextBox and would like to replicate this code for everyone. Is there any way I can replicate this validation for all TextBox without me putting that code in the event KeyPress of each of them ?

Answer 1

Record this method as Handler Keypress event for all Textbox:

textBox1.KeyPress += txtTempoAcel1_KeyPress;
textBox2.KeyPress += txtTempoAcel1_KeyPress;
textBox3.KeyPress += txtTempoAcel1_KeyPress;
textBox4.KeyPress += txtTempoAcel1_KeyPress;
...
...

Perhaps we should rename the method.

Answer 2

Another way to solve it is by creating a heritage of TextBox

public class MeuTextBox : TextBox
{
    private bool _validaDigito;

    public MeuTextBox()
    {
        ValidaDigito = true;
    }

    public bool ValidaDigito
    {
        get { return _validaDigito; }
        set
        {
            _validaDigito = value;

            if (value)
                KeyPress += Text_KeyPress;
            else
                KeyPress -= Text_KeyPress;
        }
    }

    private void Text_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (!Char.IsDigit(e.KeyChar) && e.KeyChar != (char)8 && e.KeyChar == 48)
            e.Handled = true;
    }
}

When giving build, your MeuTextBox will be available in Toolbox to be used.