C# 拖拽文件到 textBox

textBox1 属性 AllowDrop 设置为 True

以下是 textBox1的两个事件实现：

 private void textBox1_DragDrop(object sender, DragEventArgs e)
        {
            string[] s = (string[])e.Data.GetData(DataFormats.FileDrop, false);
            if (s.Count() > 0)
            {
                string epsEx = System.IO.Path.GetExtension(s[0]);
                if (epsEx.ToLower() == ".xml") textBox1.Text = s[0];
            }
        }
        private void textBox1_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
                e.Effect = DragDropEffects.All;
            else
                e.Effect = DragDropEffects.None;
        }