Numeric Textbox!

Hi,
I am trying to create a numeric textbox in C#.
I got few useful links and used them but when I am using special characters then its crashes.

Please advice.

Thanks

Textbox can only support text/string. You need to cast or convert or .tostring your value so it's appropriate before assigning to a textbox.

Quote:

---

Originally Posted by viperbyte

Textbox can only support text/string. You need to cast or convert or .tostring your value so it's appropriate before assigning to a textbox.

---

Well, "1" is a string, and so is "1.2345". I think that is what the OP means.

However, I don't get how you expect us to psychically debug your code. I would bet that your validation routine is just poor and you are trying to convert a string of an incorrect format to an integer, floating point number, whatever.

I figured he was trying to do something like this: textbox1.text = 40; since he said it was crashing. But yeah you're probably right with what you said about what he was probably trying to do; escpecialy since he did mention special characters.

I meant I thought he was trying to do something like: textbox1.text = IntegerVariable;. Man lately I can't express a thought accurately in writing on the first shot.

I got the point the first time :)

check this article

http://www.mindstick.com/Articles/6e...-a8b756404f09/

select your textbox and then from events double click on Keypress and paste this code

Code:

---

const char Delete = (char)8;
e.Handled = !Char.IsDigit(e.KeyChar) && e.KeyChar != Delete);

---

this code will disable all characters on textbox except backspase and delete. if you want to use "," then just paste after != Delete this code

Code:

---

&& (e.KeyChar != Convert.ToChar(",")

---

Thanks John & invador

What about a decimal? Do you need to be able to handle decimal numbers or only integers.

Also invader, backspace is 8, delete is 46. Why don't you just use the Keys enumeration?