拖动文件到文本框，如何得到路径？

Question

如题，现在有一个文本框，TextBox1，allowdrop设置为true，未做其他设置，怎么才能让一个文件拖到上面就显示这个文件的路径（最好绝对路径）呢？？翻书没翻到。

Answer 1

设置textBox1的DragEnter和DragDrop事件，然后在事件里这么填就行。
        private void textBox1_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                e.Effect = DragDropEffects.All;
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        }        private void textBox1_DragDrop(object sender, DragEventArgs e)
        {
            String[] files = (String[])e.Data.GetData(DataFormats.FileDrop, false);
            if (files.Length > 0)
            {
                textBox1.Text = files[0];
            }
        }

Answer 2

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();            this.textBox1.Multiline = true;
            this.textBox1.AllowDrop = true;
            this.textBox1.DragDrop+=new DragEventHandler(textBox1_DragDrop);
            this.textBox1.DragEnter+=new DragEventHandler(textBox1_DragEnter);
        }        protected void textBox1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
        {
            IDataObject dataObject = e.Data;
            if (dataObject.GetDataPresent(DataFormats.FileDrop))
            {
                e.Effect = DragDropEffects.Copy;
            }
        }        protected void textBox1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
        {
            
            IDataObject dataObject = e.Data;            if (dataObject == null) return;            if (dataObject.GetDataPresent(DataFormats.FileDrop))
            {
                string[] files = (string[])dataObject.GetData(DataFormats.FileDrop);                foreach (string file in files)
                {
                    System.IO.FileInfo fi = new System.IO.FileInfo(file);
                     this.textBox1.Text += "文件名：" + fi.Name;
                    
                }            }
        }    }