Good way to Invoke in Action method

How do i I开发者_开发问答nvoke items so the TestAction do write out "s.Hello"? Right now i don't do anything, it jumps over the "action = s.." line.

Or is the another way to do this? Since i don't want to return any code i use the Action instead of Func

I just started to work with Action.

public class Items
{
    public string Hello { get; set; }
}

public class TestClass
{
    public void TestAction(Action<Items> action)
    {
        action = s => Console.WriteLine(s.Hello);
    }

    public TestClass()
    {
        TestAction(b => b.Hello = "Hello world!");
    }
}

Let's drill down your code, from the bottom of the stacktrace.

1. TestAction(b => b.Hello = "Hello world!");

You are supplying a lambda that assigns b.Hello as "Hello World".

1. action = s => Console.WriteLine(s.Hello);

You are assigning that same delegate a new lambda.

You aren't actually doing anything with them - you are just generating a delegate. To execute that delegate, you need an argument of class Items. What you really want is to call the action with such an argument.

public class TestClass
{
    public void TestAction(Action<Items> action)
    {
        Items i = new Item() { Hello = "Hello World");
        action(i);
    }

    public TestClass()
    {
        TestAction(b => Console.WriteLine(b.Hello));
    }
}