multi-thread :Can't call UccContext.AddNamedProperty ?

Question

Problem:Can't call UccContext.AddNamedProperty in sub-thread.
Environment: XP sp2,.NET 3.5,uccapi 2.0,C#

I wanna create a UccContext and add some property on it, so i wrote following code:

----------------------------- CODE BEGIN -----------------------------
UccContext m_ctx;

m_ctx = new UccContextClass();
m_ctx.AddNamedProperty("testkey","testvalue");
----------------------------- CODE END    -----------------------------

the code works very well when they are in main thread(e.g. in Form1()).
But when i wrote the same code in another thread, it throw a access violation exception.
----------------------------- CODE BEGIN -----------------------------
  public Form1()
  {
   ...
   m_EngineThread = new Thread(CommandEngine.StartThread);
   m_EngineThread.Start();
   ...
  }

  public static void StartThread()
  {
            int iRet;
            string sRet;
            UccContext   m_uc;
   
           ...
           m_uc = new UccContextClass();
           m_uc.AddNamedProperty("something","somevalue");  <---- throw exception

           ....
  }
----------------------------- CODE END    -----------------------------

the parameters of AddNamedProperty is not the exception reason.
I tried follow codes, it still throw exception:

           m_uc = new UccContextClass();
           iRet = m_uc.Count;  <--- throw exception


why it's so strange? Anyone has some suggestions?

Answer 1

Hi, We are facing the same problem. If you have solution for this problem please let us know. Thanks Annie

Answer 2

Hi could you try to use this code

UpdateVariables(string message)
{
 if (this.InvokeRequred)
 {
  this.EndInvoke(this.BeginInvoke(new MethodInvoker(delegate() { UpdateVariables(message); } )));
 }
 else
 {
m_uc = new UccContextClass();
iRef = m_uc.Count;
 }
}

Regards

---

Thanks, MOHAMED A. SAKR | Software Development Lead Engineer | EgyptNetwork

Answer 3

I am facing the same problem and i'll try the last solution

Answer 4

It's working fine

Thanks MohamedSakr