Question

I have a dropdown list and I have a secondary thread starting in which I have to get the selected value of that dropdown list. It’s always returning null or empty string. Is there a way to get its value in the secondary string?

Answer 1

UI elements are owned by the UI thread. Never try to access or even modify these, as this is not a tread safe operation. Pass the values of the dropdown the the thread when you create it and use the copied values in the second thread.

Example:

static void Main(string[] args)
{
    System.Threading.Thread myThread = new System.Threading.Thread(asyncCode);
    myThread.Start(yourParameterObject);
}

static void asyncCode(object parameters)
{
    // Use the parameters passed
}