In C#, how to check whether a string contains an integer?

Question

I just want to know, whether a String variable contains a parsable positive integer value. I do NOT want to parse the value right now.

Currently I am doing:

int parsedId; if (     (String.IsNullOrEmpty(myStringVariable) ||     (!uint.TryParse(myStringVariable, out parsedId)) ) {//..show error message} 

This is ugly - How to be more concise?

Note: I know about extension methods, but I wonder if there is something built-in.

Answer 1

You could use char.IsDigit:

     bool isIntString = "your string".All(char.IsDigit) 

Will return true if the string is a number

    bool containsInt = "your string".Any(char.IsDigit) 

Will return true if the string contains a digit

Answer 2

Assuming you want to check that all characters in the string are digits, you could use the Enumerable.All Extension Method with the Char.IsDigit Method as follows:

bool allCharactersInStringAreDigits = myStringVariable.All(char.IsDigit);