How can we validate a string variable for numeric format?

Question

The if condition is only checking for null or empty, this wouldn't fix the flaw. I want to check whether the Year string contains a number.

string Year = Request.Params[""year""];
if (Year == null || Year.Equals(""""))    
{    
    Year = System.DateTime.Now.Year.ToString();    
}

possible duplicate of [How to identify if a string is a number?](http://stackoverflow.com/questions/894263/how-to-identify-if-a-string-is-a-number) — CodeCaster, Sep 30 '15 at 10:32

score 0 · Answer 1 · answered Sep 30 '15 at 10:35

0

Use TryParse:

int x;
if (Year == null || Year.Equals("""") || !int.TryParse(Year, out x)){
     // your code

}

answered Sep 30 '15 at 10:35

Maor Veitsman

score 0 · Answer 2 · answered Sep 30 '15 at 11:33

0

Try the following code. It will check if a string contains a numeric value

answered Sep 30 '15 at 11:33

Manraj

2 Answers2