convert list to string c#

There are many ways you will do convert list to string c# from google. But what you will adopt, which is good in terms of line and in terms of complexity.

 I will demonstrate three ways to convert list to string c# with “,” seperated  and you will see that which one is taking less time in execution.

Suppose you have list of sting, that you can form like below code; Having 1Lakhs of string records

Code snippet

List<string> strC = new List<string>();

            for (int i = 0; i <= 10000; i++)

                strC.Add("string " + i.ToString());

Convert list to string - 1st way

Just assign the array values to one of the string and remove the last character like below code;

foreach (string o in strC)

            {

                str += o;

            }

str.Remove(strC.Count - 1);

Convert list to string - 2nd way

Just assign the first value to the string than check for the second values and assign it to the string with the “,” separated values.

Console.WriteLine(" 2) Start : - " + DateTime.Now);

            foreach (string o in strC)

            {

                if (first)

                {

                    str2 += o;

                    first = false;

                }

                else

                {

                    str2 += "," + o;

                }

            }

Convert list to string - 3^rd Way

By doing simple API of string.join. It will concatenate the string array into the string values.

Console.WriteLine(" 3) Start : - " + DateTime.Now);

            string str3 = string.Join(",", strC.ToArray());

You can see the full code of converting the string array into the string type in C# with  “,” separated values.

Code snippet

  static void Main(string[] args)

        {

            List<string> strC = new List<string>();

            for (int i = 0; i <= 100000; i++)

                strC.Add("string " + i.ToString());

            string str = string.Empty;

            bool first = true;

         

            Console.WriteLine(" 1) Start : - " + DateTime.Now);

            foreach (string o in strC)

            {

                str += o;

            }

              str.Remove(strC.Count - 1);

            //  Console.WriteLine(str);

            Console.WriteLine("End : - " + DateTime.Now);

            string str2 = string.Empty;

            Console.WriteLine(" 2) Start : - " + DateTime.Now);

            foreach (string o in strC)

            {

                if (first)

                {

                    str2 += o;

                    first = false;

                }

                else

                {

                    str2 += "," + o;

                }

            }

            // Console.WriteLine(str);

            Console.WriteLine("End : - " + DateTime.Now);

            Console.WriteLine(" 3) Start : - " + DateTime.Now);

            string str3 = string.Join(",", strC.ToArray());

            Console.WriteLine("End : - " + DateTime.Now);

        }

Now run the application you can see which will take much time.