Custom Validator

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Author : Exforsys Inc. Published on: 4th Mar 2005 | Last Updated on: 18th Dec 2010

ASP .NET: Validating User Input with C#

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Custom Validators can be used to make your own custom validation expressions. You can find many free regular expressions on the website www.Regexlib.com. Here is a small example of the Custom Validator Control.

Sample Code

// This is the server side validation
// Double click the Custom Validator and write this code
{
string strPalindrome = args.Value;
string strReverse = "";
// Reverse the string
for(int intI = strPalindrome.Length -1; intI>=0; intI--) strReverse = strReverse + strPalindrome[intI];
if(strReverse == strPalindrome)
{
args.IsValid = true;
}
else
{
args.IsValid = false;
}
}