How to convert string to integer in C#

Question

How do I convert a string to an integer in C#?

Answer 1

int myInt = System.Convert.ToInt32(myString);

As several others have mentioned, you can also use int.Parse() and int.TryParse().

If you're certain that the string will always be an int:

int myInt = int.Parse(myString);

If you'd like to check whether string is really an int first:

int myInt;
bool isValid = int.TryParse(myString, out myInt); // the out keyword allows the method to essentially "return" a second value
if (isValid)
{
    int plusOne = myInt + 1;
}

Answer 2

int a = int.Parse(myString);

or better yet, look into int.TryParse(string)

Answer 3

int i;

string result = Something;

i = Convert.ToInt32(result);

Answer 4

class MyMath
{
    public dynamic Sum(dynamic x, dynamic y)
    {
        return (x+y);
    }
}

class Demo
{
    static void Main(string[] args)
    {
        MyMath d = new MyMath();
        Console.WriteLine(d.Sum(23.2, 32.2));
    }
}

Answer 5

If you are sure that you have "real" number in your string, or you are comfortable of any exception that might arise, use this.

string s="4";
int a=int.Parse(s);

For some more control over the process, use

string s="maybe 4";
int a;
if (int.TryParse(s, out a)) {
    // it's int;
}
else {
    // it's no int, and there's no exception;
}

Answer 6

You can use either,

    int i = Convert.ToInt32(myString);

or

    int i =int.Parse(myString);