How to Pass or Access Command-line Arguments in C#?

Question

Ravi Vishwakarma · Answer

In C#, you can pass command-line arguments to your application and access them within the Main method. The Main method can be defined to accept an array of strings as its parameter, which represents the command-line arguments.

Example of Passing and Accessing Command-line Arguments
Here's a simple example demonstrating how to pass and access command-line arguments in a C# console application:

using System;
class Program
{
   // Main method accepting command-line arguments
   static void Main(string[] args)
   {
       // Check if arguments are provided
       if (args.Length > 0)
       {
           // Loop through the arguments and print them
           for (int i = 0; i < args.Length; i++)
           {
               Console.WriteLine($"Argument {i}: {args[i]}");
           }
       }
       else
       {
           Console.WriteLine("No command-line arguments were provided.");
       }
   }
}

Running the Application with Command-line Arguments
To run the application with command-line arguments, you can use a terminal or command prompt. Navigate to the directory where your compiled executable is located and run it with arguments:

dotnet run arg1 arg2 arg3

Or if you are running the compiled executable directly:

Program.exe arg1 arg2 arg3

Handling Command-line Arguments in Visual Studio

If you are using Visual Studio, you can set command-line arguments in the project properties:

Right-click on the project in Solution Explorer and select "Properties".
Go to the "Debug" tab.
In the "Command line arguments" field, enter the arguments you want to pass to the application.
Save the changes and run the project.

Detailed Explanation

Defining the Main Method: The Main method is defined with a parameter args, which is an array of strings (string[] args). This array holds the command-line arguments passed to the application.
Checking for Arguments: The code checks if any arguments are provided by checking the length of the args array (args.Length).
Looping Through the Arguments: If arguments are provided, a for loop is used to iterate through the args array and print each argument along with its index.
No Arguments Provided: If no arguments are provided, a message is printed indicating that no command-line arguments were given.

Output :

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How to Pass or Access Command-line Arguments in C#?

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Handling Command-line Arguments in Visual Studio