public static bool IsNumeric(string theValue){
Regex _isNumber = new
Regex(@"^\d+$");
Match m = _isNumber.Match(theValue);
return
m.Success;}
And run it.
Tuesday, September 18, 2007
IsNumeric Method : Regular Expression
Using int.Parse(expression) method throw an error if expression doesn't numeric; Instead of that, an alternative, is use custom method regular expression based. It returns a boolean value.
And run it.
And run it.
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2 comments:
i would sugest to use the following regex to allow for negative values to:
Regex regNum = new Regex(@"^[-+]\d+$");
this is the correct one:
positive and negative numbers and allows decimals:
Regex regNum = new Regex(@"^[-+]?[0-9]*\.?[0-9]+$");
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