In C #, let ListBox support drag-and-drop dragdrop of file paths.

Sometimes, our program needs to load a file list, which is usually stored in ListBox. In order to facilitate the operation, it is a very good function to allow ListBox to support dragging to the file path, in. net, It is very convenient and easy to implement, only three steps are required:

1. Set the allowdrop attribute of ListBox to true.
2. Handling in the dragover and dragenter events of ListBox

Void listbox1dragenter (Object sender, drageventargs e) {e. effect = dragdropeffects. All;} void listbox1dragover (Object sender, drageventargs e) {e. effect = dragdropeffects. All ;}

The above E. effect can adjust different values according to the actual situation. However, if you are not sure, use the default all

3. process drag-and-drop events

Void listbox1dragdrop (Object sender, drageventargs e) {If (E. data. getdatapresent (dataformats. filedrop, false) {string [] files = (string []) E. data. getdata (dataformats. filedrop); foreach (string s in files) {(sender as ListBox ). items. add (s );}}

This is done, haha.

Is it easy?