Question

I have 3 lists of the following type:

1. folderName : String
2. FTPcount : Int
3. Expectedcount : Int

All are related to each other (based on their index in the list) and I want to pass them as argument to BackGroundWorker which reads the folderName while increments FTPcount and Expectedcount.

How can I pass them (by reference ? ) such that I will be able to see the increments after each one has finished its execution ?

        List<string> folderName = new List<string>();
        List<int> Expectedcount = new List<int>();
        List<int> FTPcount = new List<int>();

        foreach (string folder in Properties.Settings.Default.Folders)
        {
            BackgroundWorker bg = new BackgroundWorker();

            bGs.Add(bg);
            Expectedcount.Add(new int());
            FTPcount.Add(new int());
            folderName.Add(folder);

            bg.DoWork += new DoWorkEventHandler(Process_Instiution);
            bg.RunWorkerAsync(new { folderName = folder, Expected = Expectedcount[Expectedcount.Count - 1] as object, FTP = FTPcount[FTPcount.Count - 1] as object });
        }

        while (true)
        {
            bool IsBusy = false;
            foreach (BackgroundWorker bg in bGs)
                if (bg.IsBusy)
                {
                    IsBusy = true;
                    break;
                }

            if (IsBusy)
                Application.DoEvents();
            else
                break;
        }
        //Code to read the various List and see how many files were expected and how many were FTPed.

Answer 1

Use the DoWork(Object data) method that specifics the argument. You will have to cast and it retrieve it from args Argument Property.

I would either create a object wrapper to pass the data or use an anonymous type.