C# : isNumeric (FW 1.1)

[Shuja Ali]

To check if a string is a valid number we either have to use the Try..Catch..Finally with Integer.Parse or try Double.TryParse.

I just saw a method using regular expressions sometime back

		private bool isNumeric(string stringToCheck) 
		{
			System.Text.RegularExpressions.Regex _isNumber = 
						new System.Text.RegularExpressions.Regex
						(@"(^[-+]?\d+(,?\d*)*\.?\d*([Ee][-+]\d*)?$)|(^[-+]?\d?(,?\d*)*\.\d+([Ee][-+]\d*)?$)");
			return _isNumber.Match(stringToCheck).Success;
		}

We can call this function like this

if (isNumeric("1234"))
			{
				//string is a valid number
			}
			else
			{
				//string is not a valid number
			}