Custom validations on textbox

Question

How to code NAME textbox that accepts only letters & blankspaces. Same for NUMBER textbox:

private void tbOwnerName_TextChanged(object sender, EventArgs e)
{
    /*if (!char.IsControl(e.KeyChar) && !char.IsLetter(e.KeyChar))
    {
        e.Handled = true;
        base.OnKeyPress(e);
        MessageBox.Show("Please enter Characters only");

    }*/
}

Possible duplicate of [Validation textbox in winforms](http://stackoverflow.com/questions/12866314/validation-textbox-in-winforms) — Peter Szekeli, Feb 20 '16 at 07:21
Possible duplicate of [WinForm UI Validation](http://stackoverflow.com/questions/769184/winform-ui-validation) — Rob, Feb 22 '16 at 00:15

score 2 · Accepted Answer · edited May 23 '17 at 11:50

2

The proper way to do that is using regular expressions , in C# you can use REGEX class to check if an string matches a patterns that declared by regular expression.

Regex regex = new Regex(@"^[a-zA-Z0-9_ ]*$");
Match match = regex.Match("Dot 55 Perls");
if (match.Success)
{
    //do something
}

this answer might help you to find the proper regular expression for your situation.

edited May 23 '17 at 11:50

Community

1
1

answered Feb 20 '16 at 07:14

M Taher

130
2
13

Better to add some sample code, otherwise it will be considered as a low quality answer. – Shaharyar Feb 20 '16 at 07:25
I know that but i posted answer from my smart phone , and it was hard to add sample code – M Taher Feb 20 '16 at 07:26

Custom validations on textbox

1 Answers1