How to access the object of one thread to object of another thread

Question

2.00/5 (1 vote)

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Hi Friends,

I need help in C# coding. I have one dll example test.dll.

Creating two objects for this test.dll.

Sample code:

C#

public void callprocedure()
        {
            
          
            //this delegate will handle thread start event
            ThreadStart ts = new ThreadStart(Line.ProcessingThread);
            //create new thread
            Thread wrkThread = new Thread(ts);
            Line.CurrentThread = wrkThread;
            wrkThread.SetApartmentState(ApartmentState.STA); //default is MTA
            wrkThread.Name = "0"; //for easier tracing
            wrkThread.Start();
        }



// Here the tread method calling.
public void ProcessingThread()
            {
 private test test1;
    
                int iThreadId = CurrentThread.GetHashCode(); //unique thread id
               // here creating the object for test.dll and using as per requirement 
               test1= new test.ADXVoice();
}

// Now second thread starting here
      public void connectcall()
        {
         
// calling method from the second thread
         ThreadStart tscall = new ThreadStart(ProcessingThreadForNextCall);
          Thread calthread = new Thread(tscall);
            Thread CurrentThread = calthread;
            calthread.Start();
  
                }
            }

public void ProcessingThreadForNextCall()
          {
              int iThreadId = CurrentThread.GetHashCode(); //unique thread id
              Trace("In the new thread " + iThreadId + " line = " + iResource);
            
private test test2;
                  test2= new test.ADXVoice()
                 
// Now here in this method i want this as follows

test1.DisconnectCall();// here I am getting the object set null.

}

My comments: test1 is object of first thread function so if i try to access in second thread funtion then getting null exception.

So friends please suggest me how to access the object of that test1 in test2 created method.

But am getting "object reference not correct" Obeviously i will get this error before that test1 is object in firstthread but I am trying to access in secondthread.

How can I solve this issue please any suggestions please.....

Thanks & Regards
Syed Chand Basha

Posted 30-Oct-14 18:24pm

chand5055

Updated 9-Nov-14 21:06pm

Tomas Takac

v4

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Comments

Sergey Alexandrovich Kryukov 31-Oct-14 2:09am

You need to produce some comprehensive code sample which reproduces the problem and can be built immediately. Chances are, this is something really simple.
—SA

gggustafson 31-Oct-14 10:33am

Agree with Sergey

chand5055 10-Nov-14 1:57am

Hi Sergey and gggustafson can give any suggestions by this sample code..

Afzaal Ahmad Zeeshan 10-Nov-14 14:57pm

Reply to their comment to let them know when you've replied to their question or comment.

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Kuthuparakkal · Answer 1 · 2014-11-10T08:48:00

move the following codes to class level rather than scoped at method level.

C#

private test test1;
private test test2;
private Object thisLock = new Object();

Now you can access the test1 or test2 from anywhere, just check if they are null or not. Also use lock sequences.

C#

public void ProcessingThreadForNextCall()
{
        int iThreadId = CurrentThread.GetHashCode(); //unique thread id
        Trace("In the new thread " + iThreadId + " line = " + iResource);
        
        test2= new test.ADXVoice()

        //Now here in this method i want this as follows
        lock (thisLock)
        {
        if(test1 !=null)
        test1.DisconnectCall();// here I am getting the object set null.
        }
}