C # solve the eventhandler parameter transfer problem using anonymous Functions

First, it is easy to dynamically generate picturebox,
Picturebox box = new picturebox ();
Box. imagelocation = imageroad;
Secondly, it is not difficult to add a right-click menu to picturebox,
Contextmenu menu = new contextmenu ();
Box. contextmenu = menu;
Then, add the "delete" item to the right-click menu and delete the image event. This is troublesome.
Menuitem item = new menuitem ("delete ");
Menu. menuitems. Add (item, new eventhandler (item_click ));
Void item_click (Object sender, eventargs E)
{
// Added the image deletion function.
// 1. Obtain the image object
// 2. delete an image
}
In the item_click method, you cannot delete an image object because it cannot obtain its value. Unless the picturebox object can be passed as a parameter in the item_click method. I don't know how to implement this.
Try to use the anonymous method,
Menu. menuitems. Add (item, delegate (Object o, eventhandler e) {box. imagelocation = "";});
Since the anonymous method is in the method body, box can be passed as a parameter.
Conclusion: The anonymous method is used to pass event parameters, because the anonymous method can use external parameters.
Keywords: event, Delegate, anonymous method
Language Platform: C #2.0 or above