C # Drag and Drop a file using a form

1. Set the AllowDrag attribute of your form or space to allow. 2. register the DragEnter event. 3. Obtain the file path. data. getFormats () method to obtain all data formats 4. Call e. the GetData () method obtains the file path based on the specified data format. 5. With the file path, I believe all problems are solved. The following is an example: [csharp] private void textbox#dragenter (object sender, DragEventArgs e) {// obtain the data format File. writeAllLines ("C: \ 1. text ", e. data. getFormats (); // get the file name string [] filename = (string []) e. data. getData ("FileNameW", true); textBox1.Text = filename [0]; string entesion = Path. GetFileName (textBox1.Text); if (! File. exists (textBox1.Text. trim () {return;} // read the File stream using (FileStream fsOpen = File. openRead (textBox1.Text. trim () {using (FileStream fs = new FileStream ("C :\\" + entesion, FileMode. create, FileAccess. write) {byte [] buffer = new byte [1024*1024]; while (true) {int result = fsOpen. read (buffer, 0, buffer. length); if (result <= 0) {break;} else {fs. write (buffer, 0, result) ;}} fs. flush ();} Running result: In win7, The DragDrop event may not be triggered due to unbalanced permissions, so I only use the DragEnter event in it. You can try the DragDrop event, the user experience may be better!