軒袁寨

     private void textBox1_DragDrop(object sender, DragEventArgs e)
        {
            textBox1.Text = ((string[])e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();
        }
        private void textBox1_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                e.Effect = DragDropEffects.All;
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        }