Csharp/C Sharp/Data Types/Convert

Convert string to int

 

using System;
using System.Collections.Generic;
using System.Text;
class Program {
    static void Main(string[] args) {
        Console.WriteLine("Enter an integer:");
        int myInt = Convert.ToInt32(Console.ReadLine());
        Console.WriteLine("Integer less than 10? {0}", myInt < 10);
        Console.WriteLine("Integer between 0 and 5? {0}",
                          (0 <= myInt) && (myInt <= 5));
        Console.WriteLine("Bitwise AND of Integer and 10 = {0}", myInt & 10);
    }
}

Hidden among the To(integral-type) methods are overloads that parse numbers in another base:

 
using System;
public class MainClass {
    public static void Main() {
        int thirty = Convert.ToInt32("1E", 16);      // parse in hexadecimal
        uint five = Convert.ToUInt32("101", 2);      // parse in binary
    }
}

The source and target types must be one of the "base" types. ChangeType also accepts an optional IFormatProvider argument. Here"s an example:

 
using System;
public class MainClass {
    public static void Main() {
        Type targetType = typeof(int);
        object source = "42";
        object result = Convert.ChangeType(source, targetType);
        Console.WriteLine(result);             // 42
        Console.WriteLine(result.GetType());   // System.Int32
    }
}