Cross Thread Operations in C#

Introduction

Well, if you are working with threads and want to access a control that is created in another thread then you will always face a problem saying that

To solve the tiny problem, Here is the solution

First of all, start the thread and assign it a method you want to execute it on.

Remember, the method you want to assign to the thread should not contain any parameters.

thread = new Thread (new ThreadStart (RunLoop));
thread.Start();

Now here is the RunLoop method

private void RunLoop(int i)
{
    if (listBox1.InvokeRequired)
    {
        // If Invoke is required, call the method recursively using Invoke
        MethodInvoker AssignMethodToControl = new MethodInvoker(() => RunLoop(i));
        listBox1.Invoke(AssignMethodToControl);
    }
    else
    {
        // If Invoke is not required, execute the loop and add items to the listBox
        for (int j = 0; j < 1000; j++)
        {
            listBox1.Items.Add(j);
        }
        listBox1.Items.Add(i);
    }
}

In the first line, we get to know whether the control we want to access is created on the same thread or another thread. If it's created on another thread, then it will execute the second line.

In the second line, we create a MethodInvoker with the name AssignMethodToControl, which is a delegate that executes a method that has no parameters.

In the third line, we invoke the MethodInvoker to the Control.

We have achieved our aim, so the method will re-execute, and it will loop through the condition.