.net Dont allow Alphabet

Question

I need to check if my String contains Alphabet Characters. Because it needs to just contains a number.

         String^ buffer;
         buffer = this->textBox4->Text;

possible duplicate of [How can I validate a string to only allow alphanumeric characters in it?](http://stackoverflow.com/questions/1046740/how-can-i-validate-a-string-to-only-allow-alphanumeric-characters-in-it) — jgauffin, Feb 02 '15 at 08:16
do the same thing as the linked question, but only for letters. — jgauffin, Feb 02 '15 at 08:17
I got my String and I need to verifie if it got only numbers — Amber, Feb 02 '15 at 08:33

score 0 · Answer 1 · answered Feb 02 '15 at 08:16

0

Look at the regular expressions provided by the .NET Framework, such as ^\d+^. (Assuming whole numbers only).

answered Feb 02 '15 at 08:16

npinti

1

@Amber: What framework are you using? `C#`, `VB.Net`, `C++.Net`, `F#` or something else? – npinti Feb 02 '15 at 08:48
@Amber: Take a look at [this](https://msdn.microsoft.com/en-us/library/kxwfbb3b.aspx) link. IF you combine it with the regular expression I provided, the code should yield `False` if the string is made from characters which are not numbers. – npinti Feb 02 '15 at 09:28

1 Answers1