title: Search the combo box c#
body: <p>I am building a library software and I need some help from you. In the book lending section, I have a text box for typing the book number and a combo for the book name. The system is such that when I type the book's id in the text box, it comes up with its name in the combo box, like searching in the data grid view. The problem is that I do not know how to code the database and call and in general it is better to say I do not know what to do! Please help.</p>