Removing a Control from a Form

So I've got some serious problems with removing a Control from a Form of my application. It's kinda messed up but I can't change anything. I have a form and I have a separated user Control. The control opens an exe file and shows a progress bar while loading it's bytes. And here comes the problem. I do all of it with a Background开发者_开发问答Worker and when the worker_DoWorkerCompleted method is called the original form should show a MessageBox and remove the Control.

BackGround_Loader bgLoad = new BackGround_Loader();
bgLoad.Location = new Point(this.Width/2 - bgLoad.Width/2, this.Height/2 - bgLoad.Height/2);
this.Controls.Add(bgLoad);
bgLoad.BringToFront();
bgLoad.AddReferences(this.executableFile, this.SourceReader);
bgLoad.occuredEvent();

At first I set the control's location to be in the middle of the Form itself. Then I add the control to the form, and bring it to the front. After these I send the path of the executable and a RichTextBox's reference to this. With the occuredEvent I start the BackgroundWorker itself. And here comes my problem. I should show a MessageBox in the Form when the in the bgLoad the backgroundworker gets to the DoWorkerCompleted status. Kindly I have no idea how to do it. It works just perfect however the control stays in the middle of the form.

UI actions must be performed on the main UI thread. The events that get raised from the background worker thread are (obviously) in a different thread.

You need something like the following code:

private void backgroundWorker_DoWork(object sender, AlbumInfoEventArgs e)
{
    // Check with an element on the form whether this is a cross thread call
    if (dataGridView.InvokeRequired)
    {
        dataGridView.Invoke((MethodInvoker)delegate { AddToGrid(e.AlbumInfo); });
    }
    else
    {
        AddToGrid(e.AlbumInfo);
    }
}

In this case AddToGrid is my method for adding a row to a DataGridView, but in your case it will be a method that does what you need to do.

Similarly for the backgroundWorker_RunWorkerCompleted method

See this MSDN example

I could find a way to solve the problem but I don't really like it. In the addReferences method I pass the Form itself and an object of the bgLoad class. Then in the RunWorkerCompleted I check if the control is on the form and if it is then I remove it.

bgLoad.AddReferences(this, bgLoad, this.executableFile, this.SourceReader);

...
private void worker_DoWorkerCompleted(object sender, DoWorkerEventArgs e) {
    if(this.MainForm.Controls.Contains(this.Control) {
        this.MainForm.Controls.Remove(this.Control);
    }
}

Like this it works but it's awful for me.