Question

How to compare two strings using string.Compare and CompareTo methods in C#

Answer 1

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string s1 = "a";
            string s2 = "b";

            int rv = string.Compare(s1, s2);
            if (rv == 1)
                Console.WriteLine("s1 > s2");
            else if (rv == -1)
                Console.WriteLine("s2 > s1"); // s2 > s1
            else
                Console.WriteLine("s1 = s2");
        }
    }
}

/*
run:

s2 > s1

*/

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Answer 2

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string s1 = "b";
            string s2 = "a";

            int rv = string.Compare(s1, s2);
            if (rv == 1)
                Console.WriteLine("s1 > s2"); // s1 > s2
            else if (rv == -1)
                Console.WriteLine("s2 > s1");
            else
                Console.WriteLine("s1 = s2");
        }
    }
}

/*
run:

s1 > s2

*/

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Answer 3

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string s1 = "b";
            string s2 = "b";

            int rv = string.Compare(s1, s2);
            if (rv == 1)
                Console.WriteLine("s1 > s2");
            else if (rv == -1)
                Console.WriteLine("s2 > s1");
            else
                Console.WriteLine("s1 = s2"); // s1 = s2
        }
    }
}

/*
run:

s1 = s2

*/

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Answer 4

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string s1 = "a";
            string s2 = "A";

            int rv = string.Compare(s1, s2, StringComparison.OrdinalIgnoreCase);
            if (rv == 1)
                Console.WriteLine("s1 > s2");
            else if (rv == -1)
                Console.WriteLine("s2 > s1");
            else
                Console.WriteLine("s1 = s2"); // s1 = s2
        }
    }
}

/*
run:

s1 = s2

*/

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Answer 5

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string s1 = "abc";
            string s2 = "abx";

            int rv = string.Compare(s1, s2);
            if (rv == 1)
                Console.WriteLine("s1 > s2");
            else if (rv == -1)
                Console.WriteLine("s2 > s1"); // s2 > s1 
            else
                Console.WriteLine("s1 = s2");
        }
    }
}

/*
run:

s2 > s1

*/

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Answer 6

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string s1 = "a";
            string s2 = "b";

            int rv = s1.CompareTo(s2);
            if (rv == 1)
                Console.WriteLine("s1 > s2");
            else if (rv == -1)
                Console.WriteLine("s2 > s1"); // s2 > s1 
            else
                Console.WriteLine("s1 = s2");
        }
    }
}

/*
run:

s2 > s1

*/

70+ SQL courses for beginners and professionals