C# Trying to type cast array values

Question

When trying to cast an int from an array string value in the following code;

   using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;


    namespace hourscount
    {
        class Program
        {
            static void Main(string[] args)
            {
                string delimiter = ":";
                string time1 = Console.ReadLine();
                string time2 = Console.ReadLine();

                if (time1 == null || time2 == null)
                {
                    Console.WriteLine("Program expects two values!");
                    Console.ReadLine();

                }
                else
                {
                    string[] time1var = time1.Split(new string[] {delimiter}, StringSplitOptions.None);
                    string[] time2var = time2.Split(new string[] { delimiter }, StringSplitOptions.None);
                    int time2Intvar1 = int.TryParse(time2var[0]);
                    int time1Intvar1 = int.TryParse(time1var[0]);
                    int time2Intvar2 = int.TryParse(time2var[1]);
                    int time1Intvar2 = int.TryParse(time1var[1]);
                    int realHours = (time2Intvar1 - time1Intvar1);
                    Console.ReadLine();
                }
            }

        }
    }

I am getting the following error; Error 1 No overload for method 'TryParse' takes 1 argument

This isn't a cast, it's parsing and/or a conversion. And with Intellisense, why isn't it apparent to you that an additional argument is required? I don't quite get that. — Jonathan Wood
– Jonathan Wood, Commented Jan 6, 2013 at 1:42
It's in my first comment to your question, plain as day. Is this the same reason you missed the information about this argument in Intellisense? — Jonathan Wood
– Jonathan Wood, Commented Jan 6, 2013 at 20:07

I4V · Accepted Answer · 2013-01-06 01:48:42Z

4

Use it as

int time2Intvar1;
bool isOK = int.TryParse(time2var[0],out time2Intvar1);

For more information see

http://www.dotnetperls.com/int-tryparse

http://msdn.microsoft.com/en-us/library/f02979c7.aspx

edited Jan 6, 2013 at 1:48

answered Jan 6, 2013 at 1:41

I4V

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Comments

Tim Schmelter · Accepted Answer · 2013-01-06 01:43:27Z

4

You need to provide the out parameter for int.TryParse:

int time2Intvar1;
bool canBeParsed = int.TryParse(time2var[0], out time2Intvar1);

It is initalized afterwards.

answered Jan 6, 2013 at 1:43

Tim Schmelter

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