Bman

Hi, I’m looking for help on validation, I would like to know how to validate the data entered in a text box. I would like to restrict the box to # and give the user message that they can only enter a number. Can someone show me how this is done or direct me to info on this?

Thanks!

BlazingWolf

I'm sure you can do it with Regular Expressions which is a great thing to learn anyway. :p

Google is your friend.

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BlazingWolf

xavier

Look into double.TryParse()

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Pedja

I guess it should go something like this:

TextBox1.KeyPress+=new KeyPressEventHandler(Validate);
private void Validate(object sender,System.Windows.Forms.KeyPressEventArgs e)
{
if(!Char.IsNumber(e.KeyChar))
{
e.Handled=true;//this way you prevent the letter to be written in the Text box
MessageBox.Show("Write something");
}
}

Kilo

wow pedja, first of all that tablature is piss poor. Second please surround all code in tags.

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Pedja

My english is not very good. I don't know what tablature means. Piss poor I get.
What is wrong with the code?

BlazingWolf

If you don't have anything to add the post and all you want to do is flame someone don't post.

Pedja, just make sure to put your code in "[code]" tages. Without qoutes and the trailing tage with a / before code of course.

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BlazingWolf

Pedja

Thank you very much!