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c#delegatesfirst-class-functions
Alexander Bird
Alexander Bird

Reputation: 40669

C# version of Java Runnable? (delegate?)

I could not find a direct answer to this question yet in SO. Is there a predefined delegate with void (void) signature?

Upvotes: 2

Views: 9247

Answers (3)

David Yaw
David Yaw

Reputation: 27864

Action has the signature you're looking for. However, it doesn't mean the same thing as Runnable does: Runnable generally indicates that the run() method is intended to be run on a Thread, while Action makes no indication. For that you'd want ThreadStart, which has the same signature, and does make that indication.

If all you need is a delegate with no parameters, Action is what you want. If you're dealing with threads and need to indicate the start method, use ThreadStart.

Upvotes: 3

user334899
user334899

Reputation:

The Action delegate is a void with no parameters.

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

There are also other signatures with up to 16 parameters.

Upvotes: 1

user195488
user195488

Reputation:

Nope. C# handles threads differently to Java. In Java, the Runnable interface is an alternative to subclassing Thread, but you still have to create a new Thread object, passing the Runnable to a constructor.

Rather than subclassing the Thread class, you simply create a new System.Threading.Thread object and pass it a ThreadStart delegate (this is the function where you do the work). ThreadStart is the exact C# equivalent to Java's Runnable.

However, the Action delegate has the void parameters you speak of.

Upvotes: 1

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