If textBox1 Contains Integer

Question

I just have a simple question... How do I check to see if a textbox or a string contains an Integer?

please no code just maybe a hint or two :D

thanks all :)

Answer 1

hint 1: have a look on the static methods of int... there are 2 methods

hint 2: try regex

Answer 2

int.TryParse( ....

Answer 3

Use regular expression pattern.

Answer 4

Hint: There is a method in Int32 that returns false if passed object is not an integer.

Answer 5

use this regex pattern to validate if the text contains numbers only:

^[0-9]+$

when invalid, means that there is non numeric chars.

Regex regex = new Regex("^[0-9]+$");

regex.IsMatch(textbox1.Text);

Answer 6

regex (http://en.wikipedia.org/wiki/Regular_expression)

Answer 7

use regular expressions to check if the string contains an integer :

    if (Regex.IsMatch(yourString, "\\d"))
    {
        // Do your stuff
    }

Answer 8

A hint - The value in the textox is a string, try to parse it to int and if exception is raised - it is not an integer

EDIT: Actually there is a method which does that - Int32.TryParse

Answer 9

you can try int.TryParse or LINQ. The preferable and probably cleanest solution would be a RegEx, though.