Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

C# 4.0, optional parameters and params do not work together

How can i create a method that has optional parameters and params together?

static void Main(string[] args) {      TestOptional("A",C: "D", "E");//this will not build     TestOptional("A",C: "D"); //this does work , but i can only set 1 param     Console.ReadLine(); }  public static void TestOptional(string A, int B = 0, params string[] C) {     Console.WriteLine(A);     Console.WriteLine(B);     Console.WriteLine(C.Count()); }    
like image 435
MichaelD Avatar asked Oct 16 '10 12:10

MichaelD


People also ask

What C is used for?

C programming language is a machine-independent programming language that is mainly used to create many types of applications and operating systems such as Windows, and other complicated programs such as the Oracle database, Git, Python interpreter, and games and is considered a programming foundation in the process of ...

Is C language easy?

C is a general-purpose language that most programmers learn before moving on to more complex languages. From Unix and Windows to Tic Tac Toe and Photoshop, several of the most commonly used applications today have been built on C. It is easy to learn because: A simple syntax with only 32 keywords.

What is the full name of C?

In the real sense it has no meaning or full form. It was developed by Dennis Ritchie and Ken Thompson at AT&T bell Lab. First, they used to call it as B language then later they made some improvement into it and renamed it as C and its superscript as C++ which was invented by Dr. Stroustroupe.

Is C programming hard?

C is more difficult to learn than JavaScript, but it's a valuable skill to have because most programming languages are actually implemented in C. This is because C is a “machine-level” language. So learning it will teach you how a computer works and will actually make learning new languages in the future easier.


2 Answers

Your only option right now is to overload the TestOptional (as you had to do before C# 4). Not preferred, but it cleans up the code at the point of usage.

public static void TestOptional(string A, params string[] C) {     TestOptional(A, 0, C); }  public static void TestOptional(string A, int B, params string[] C) {     Console.WriteLine(A);     Console.WriteLine(B);     Console.WriteLine(C.Count()); } 
like image 189
CodeMonkeyKing Avatar answered Oct 17 '22 06:10

CodeMonkeyKing


Try

TestOptional("A", C: new []{ "D", "E"}); 
like image 35
Mahesh Velaga Avatar answered Oct 17 '22 06:10

Mahesh Velaga