Question

How to use Enum.TryParse() in C#

Answer 1

using System;

namespace ConsoleApplication_C_Sharp
{
    static class Program
    {
        enum Test
        {
            csharp = 0,
            python = 1,
            java = 2
        }
        static void Main(string[] args)
        {
            string s = "java";
            Test t;

            if (Enum.TryParse(s, out t))
                Console.WriteLine("java");
            else
                Console.WriteLine(t);

            s = "java-java";
            if (Enum.TryParse(s, out t))
                Console.WriteLine("java");
            else
                Console.WriteLine(t);
        }
    }
}


/*
run:
  
java
csharp

*/

 

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Answer 2

using System;

namespace ConsoleApplication_C_Sharp
{
    static class Program
    {
        enum Test
        {
            csharp = 0,
            python = 1,
            java = 2
        }
        static void Main(string[] args)
        {
            Test t;

            if (Enum.TryParse("1", out t))
                Console.WriteLine(t);
        }
    }
}


/*
run:
  
python

*/

 

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Answer 3

using System;

namespace ConsoleApplication_C_Sharp
{
    static class Program
    {
        enum Colors { Black = 0, Red = 1, Green = 2, Blue = 3 };

        static void Main(string[] args)
        {
            string[] arr = { "0", "1", "3", "5", "Red", "Green", "Blue", "Grey"};

            foreach (string s in arr)
            {
                Colors color;

                if (Enum.TryParse(s, out color))
                    if (Enum.IsDefined(typeof(Colors), color))
                        Console.WriteLine("{0} = {1}", s, color.ToString());
                    else
                        Console.WriteLine("{0} - is not in enum", s);
                else
                    Console.WriteLine("{0} - is not in enum", s);
            }
        }
    }
}


/*
run:
  
0 = Black
1 = Red
3 = Blue
5 - is not in enum
Red = Red
Green = Green
Blue = Blue
Grey - is not in enum

*/

 

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