MultiThreading in C#

Space Ghost

Hi all,

I have a method that needs to execute a lot of times. I want to drop my code in there but also the method expects two paramaters for everything to work as expected. No I am faced with the following issue.

I use the System.Threading.ThreadPool class to queue the executions. My current code looks like this:

foreach (string f in FileList)
{

bool u = true;

ThreadPool.QueueUserWorkItem(new WaitCallback(CreateK2_Excist), f );

I want to be able to pass in u and f but I can only get the WaitCallback to accept 1 paramater.

How would it be possible to pass in two paramaters too my method??

Thanks in advance!

{SpGh}

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Sam Hobbs16y ago
The way I would do it is probably the way most developers would do it; I would create a class that has the two objects in it, except I would give the objects the actual type that they are instead of just calling them objects. Then I would pass an instance of the class as the object for the callback. In the callback, I would check to ensure that the parameter is an object of the class that I am expecting. This might seem like extra work, but if you ever make a mistake then using a specific type can save a lot of time.
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Space Ghost16y ago
Got it!

ThreadPool.QueueUserWorkItem(new WaitCallback(Create_Excist), (object)new object[] { f, u });

...
   ...
      ...

public void Create_Excist(object obj1)
        {

            object one = ((object[])obj1)[0];
            object two = ((object[])obj1)[1];

Cheers!

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