命令行参数未正确返回

Question

I'm totally new and study myself in c# , I found this example from internet

// cmdline1.cs
// arguments: A B C
using System;

public class CommandLine
{
   public static void Main(string[] args)
   {
       // The Length property is used to obtain the length of the array. 
       // Notice that Length is a read-only property:
       Console.WriteLine("Number of command line parameters = {0}",
          args.Length);
       for(int i = 0; i < args.Length; i++)
    {
       Console.WriteLine("Arg[{0}] = [{1}]", i, args[i]);
    }
   }
}

Output

Number of command line parameters = 3
Arg[0] = [A]
Arg[1] = [B]
Arg[2] = [C]

I tried this code on RexTester but the output is:

Number of command line parameters = 1
Arg[0] = [parameter for the curious]

How the output will have AB and C ?

Answer 1

You need to run the program from the command line. Open a command prompt, change directory to the bin/Debug (or bin/Release, depending on how you bulit it) directory and run your command like so:

commandline.exe A B C

Answer 2

The output will have A , B , and C because you specify that when you run the program.

If you run the program outside the debugger, you do this simply by providing those values on the command line. For example:

CommandLine ABC

If you are running the program in Visual Studio using the debugger, you can provide the command line arguments in the "Debug" pane of the Project Properties window. Just enter then in the "Command line arguments" text box, exactly as you would have provided them on the command line (without the executable name itself, of course).

If you are running the program via the RexTester utility, then I have no idea how you provide command line arguments. It's not possible as far as I know (but I could be missing something).