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C# testing to see if a string is an integer?

I'm just curious as to whether there is something built into either the C# language or the .NET Framework that tests to see if something is an integer

if (x is an int)    // Do something 

It seems to me that there might be, but I am only a first-year programming student, so I don't know.

like image 271
Alex Avatar asked Nov 17 '09 23:11

Alex


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2 Answers

Use the int.TryParse method.

string x = "42"; if(int.TryParse(x, out int value))   // Do something 

If it successfully parses it will return true, and the out result will have its value as an integer.

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Brandon Avatar answered Sep 27 '22 01:09

Brandon


If you just want to check type of passed variable, you could probably use:

    var a = 2;     if (a is int)     {         //is integer     }     //or:     if (a.GetType() == typeof(int))     {         //is integer     } 
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rochal Avatar answered Sep 24 '22 01:09

rochal