CODEWITHSUNDEEP
c#javafunction
Gabber
Gabber

Reputation: 5452

Function with variable number of arguments

As the title says I need to know if there is a corresponding syntax as java's ... in method parameters, like

void printReport(String header, int... numbers) { //numbers represents varargs
  System.out.println(header);
  for (int num : numbers) {
     System.out.println(num);
  }
}

(code courtesy of wikipedia)

Upvotes: 109

Views: 111269

Answers (7)

SharpC
SharpC

Reputation: 7454

You can use params, although this must always come last in the list:

public void PrintReport(string header, params int[] numbers)
{

It is however possible to combine params optional parameters (such as [CallerMemberName]) by using named arguments, which works even if the parameters are of the same type.

Declare the method like this:

public static void PrintReport(
           [CallerMemberName] string callerName = "",
           [CallerFilePath] string sourceFilePath = "", 
           params string[] inputStrings)
{

and call it like this:

PrintReport(inputStrings: new[] { "string 1", "string 2" } );

Upvotes: 1

Carlos Quintanilla
Carlos Quintanilla

Reputation: 13303

Yes, there is. As Adriano said you can use C# 'params' keyword. An example is the in link below:

params (C# Reference)

http://msdn.microsoft.com/en-us/library/w5zay9db.aspx

"The params keyword lets you specify a method parameter that takes a variable number of arguments.

You can send a comma-separated list of arguments of the type specified in the parameter declaration, or an array of arguments of the specified type. You also can send no arguments.

No additional parameters are permitted after the params keyword in a method declaration, and only one params keyword is permitted in a method declaration."

Upvotes: 18

Mathias Schwarz
Mathias Schwarz

Reputation: 7197

You can declare a method to har a variable number of parameters by using the params keyword. Just like when using ... in Java, this will give you an array and let you call the metods with a variable number of parameters: http://msdn.microsoft.com/en-us/library/w5zay9db(v=vs.71).aspx

Upvotes: 6

Adriano Repetti
Adriano Repetti

Reputation: 67080

Yes you can write something like this:

void PrintReport(string header, params int[] numbers)
{
    Console.WriteLine(header);
    foreach (int number in numbers)
        Console.WriteLine(number);
}

Upvotes: 146

Marius
Marius

Reputation: 3141

Try using the params keyword, placed before the statement, eg 

myFunction(params int[] numbers);

Upvotes: 30

Tokk
Tokk

Reputation: 4502

I believe you mean params 

public void printReport(string header, params int[] list) 
{
    Console.WriteLine(header);

    for (int i = 0 ; i < list.Length; i++)
    {
        Console.WriteLine(list[i]);
    }
    Console.WriteLine();
}

Upvotes: 5

Thorsten Dittmar
Thorsten Dittmar

Reputation: 56697

This should be

void printReport(String header, params int[] numbers)

Upvotes: 5

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