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validate Integers.....

anushka thialkarathne

Hi all c# lovers,

I want to check the input string ( to a textbox) is a numeric value or not. what is the easiest method to do this? can someone give me a sample code for that... I hope .net has some methods to validate these formats.

thank you....

2 Replies

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Alan19y ago
Thought I'd just add that the TryParse() methods are only available in .NET 2.0 or later.

If you're using .NET 1.0 or 1.1, you can replicate it with:

int i;

bool isValid = true;

try
{
     i = Int32.Parse(textBox1.Text);
}
catch
{
    isValid = false;
    i = 0;
}
Jan Montano19y ago
use Int32.TryParse.

int i;
if (Int32.TryParse("123", out i))
{
// numeric
}
else
{
// not numeric
}