int.TryParse syntatic sugar

Question

int.TryPrase is great and all, but there is only one problem...it takes at least two lines of code to use:

int intValue;
string stringValue = \"         


        

Answer 1

Maybe use an extension method:

public static class StringExtensions
{
    public static int TryParse(this string input, int valueIfNotConverted)
    {
        int value;
        if (Int32.TryParse(input, out value))
        {
            return value;
        }
        return valueIfNotConverted;
    }
}

And usage:

string x = "1234";
int value = x.TryParse(0);

Edit: And of course you can add the obvious overload that already sets the default value to zero if that is your wish.

Answer 2

You do not WANT to make int.TryParse() one line. Why? Because you can't make an assignment to intValue if the input string isn't a valid integer. The whole point of TryParse() is to allow you to test for good input and degrade gracefully, rather than having to catch an exception.

Int.TryParse() is already a shortcut so you don't have to test for a valid int and do the assignment in two steps... that's as far as you want to take it.

Answer 3

I would create an extension method out of this.

    public static int? AsInt32(this string s)
    {
        int value;
        if (int.TryParse(s, out value))
            return value;

        return null;
    }

Answer 4

int val2 = "asd".AsInt(-1); 
//Output : -1
 int val3 = "123".AsInt(-1); 
//Output : 123

You need to have System.Web.WebPages namespace.