Dynamic binding of DataGrid (2) continued

Because my binddatagrid () is not written in! Page. ispostback, so when you really click the server button to send the page back, the problem comes again! The DataGrid does not re-call the new data of the database. It is bound to the interface. data only appears when the page is refreshed again! Why?
In fact, you only need to re-bind the database after each database operation, ProgramAn error is reported!
The solution is simple: add this sentence

This . Maid. Clear ();
This . Binddatagrid ();