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1,1 Tạo một danh sách Bound Box Nó được sử dụng để được rằng khi bạn muốn tạo ra một hình thức nhập dữ liệu, bạn chỉ được giao một recordset để kiểm soát dữ liệu và cho phép người sử dụng để di chuyển qua các dữ liệu, thay đổi khi cần thiết. | 1.1 Create a Bound List Box It used to be that when you wanted to create a data entry form you just assigned a recordset to the data control and allowed the users to scroll through the data making changes as needed. When you re dealing with Client Server or Web applications this just doesn t cut it. One of the first things you need to do is provide a method to limit the amount of data so that users can pick which record they want to edit view without pulling all the fields of a table over the Net-either LAN or Internet. List boxes and combo boxes help with that. In this How-To you will learn how to set up two data controls OleDbDataAdapter and DataSet. These controls enable you to populate a list box with one line of code. You want to see a list of customers on your Windows form in a ListBox control. You don t want to write code at this point. You only want to prototype a form so you just want to use bound data controls. How do you create a list box and bind it using the data controls Technique To get started with learning about any of the objects used for data in .NET it s important to talk about what .NET Namespaces are and how to use them. Using .NET Namespaces The .NET Framework contains a big class library. This class library consists of a number of Namespaces. These Namespaces are made up of various classes that allow us to create our objects. All of the objects and classes that make up the .NET objects such as forms controls and the various data objects can be found in Namespaces. Namespaces also can be made up of other Namespaces. For example there is a Namespace called System.Data. Although this Namespace has classes in it such as DataSet and DataTable it also has Namespaces within it called System.Data.OleDb and System.Data.SQLClient as well as others. To check out the .NET Namespaces choose Object Browser from the View menu. You can then expand the System.Data Namespace to see the other Namespaces contained within. If you are positive that the database .
