Question

I’m writing a multi-threaded applicaiton in C#, VS2008. I used this code to change an element which was created using another thread:

          m_OwnerPump.Dispatcher.Invoke(
              System.Windows.Threading.DispatcherPriority.Normal,
              new Action(
              delegate()
              {
                  m_OwnerPump.Name = textBoxPumpName.Text;
                  m_OwnerPump.Numbers = numbers.ToArray<string>();
                  //m_OwnerPump.City = tempInfo.City;
                  m_OwnerPump.EnergyConsumed = power;
              }));

It used to work peacefully but I don’t know why this exception is thrown all of a sudden!

Answer 1

I just played around with the code, to finally found the problem. I don’t know what’s the exact reason, but it’s now working.

The problem was with asking for another control’s property inside the invoker, so I put the property value in a string and used it in the invoker and the final code piece is:

            string pname = textBoxPumpName.Text;
            m_OwnerPump.Dispatcher.Invoke(
              System.Windows.Threading.DispatcherPriority.Normal,
              new Action(
              delegate()
              {
                  m_OwnerPump.Name = pname;
                  m_OwnerPump.Numbers = numbers.ToArray<string>();
                  m_OwnerPump.EnergyConsumed = power;
              }));