C# 4.0, optional parameters and params do not work together
C#.NetC# 4.0ParamsOptional ParametersC# Problem Overview
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());
}
C# Solutions
Solution 1 - C#
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());
}
Solution 2 - C#
Try
TestOptional("A", C: new []{ "D", "E"});
Solution 3 - C#
This worked for me:
static void Main(string[] args) {
TestOptional("A");
TestOptional("A", 1);
TestOptional("A", 2, "C1", "C2", "C3");
TestOptional("A", B:2);
TestOptional("A", C: new [] {"C1", "C2", "C3"});
Console.ReadLine();
}
public static void TestOptional(string A, int B = 0, params string[] C) {
Console.WriteLine("A: " + A);
Console.WriteLine("B: " + B);
Console.WriteLine("C: " + C.Length);
Console.WriteLine();
}