Write an ASP.NET web page with a DropDownList control, bind the database. But there is a problem in use, it is completely correct, but no matter which item in DropDownList, the program acquired is the first option, and it is really confused according to user choice.
I tried a lot of ways, I finally understood the reason. It turned out that the code of the DropDownList Connotation Binding Database is placed in if (! Ispostback), so that the selected item will be obtained.
