[Solved] Issue with drag and drop

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You may use a BackgroundWorker to do the operation that you need in different thread like the following :

    BackgroundWorker bgw;

    public Form1()
    {
        InitializeComponent();
        bgw = new BackgroundWorker();
        bgw.DoWork += bgw_DoWork;
    }

    private void Form1_DragDrop(object sender, DragEventArgs e)
    {
        if (e.Data.GetDataPresent(DataFormats.FileDrop))
        {
            string[] s = (string[])e.Data.GetData(DataFormats.FileDrop, false);
            bgw.RunWorkerAsync(s);
        }

    }

Also for your issue “cross thread operation”, try to use the Invoke Method like this :

    void bgw_DoWork(object sender, DoWorkEventArgs e)
    {
        Invoke(new Action<object>((args) =>
        {
            string[] files = (string[])args;

        }), e.Argument);
    }

Its better to check if the dropped items are files using GetDataPresent like above.

3

solved Issue with drag and drop