The Web service is called when a selection is made in the DropDownList control.
在DropDownList 控件中执行选择的时候，调用Web服务。
Calls the databind method of the DropDownList control to bind the data to the control.
调用DropDownList控件的databind方法把数据绑定到控件中。
Other controls, such as the DropDownList, can also be bound to the data source controls.
其他控件(例如，DropDownList)也可以绑定到数据源控件。
The Style property of the TComboBox is set to DropDownList, and the Items list if filled with the possible field types I mentioned earlier.
TComboBox的样式属性被设为DropDownList，Items列表填充了前面提到的可能字段类型。
There is a DropDownList control that is bound to a SqlDataSource source control the retrieves a list of customers from the Northwind database.
有一个DropDownList 控件，它绑定到一个从Northwind 数据库中检索客户列表的SqlDataSource源控件。
The code in Figure 5, taken from Orders_SDS.aspx (which is available in the download), shows the two SqlDataSource controls and the DropDownList.
图5中的代码(摘自orders_sds . aspx—它可在下载中得到)显示了两个SqlDataSource控件和这个DropDownList。
The employee's full name could be displayed in the DropDownList while the EmployeeID could be bound to the control as its underlying data value field.
雇员的全名可以显示在DropDownList中，而EmployeeID可以作为控件的基础数据值字段绑定到该控件。
Fortunately, the new GridView is the logical successor to the DataGrid and it USES control state properly, as do the new versions of the TextBox and DropDownList controls.
幸运的是，新的GridView是DataGrid的逻辑继承者，它像TextBox和DropDownList控件的新版本一样正确使用控件状态。
Fortunately, the new GridView is the logical successor to the DataGrid and it USES control state properly, as do the new versions of the TextBox and DropDownList controls.
幸运的是，新的GridView是DataGrid的逻辑继承者，它像TextBox和DropDownList控件的新版本一样正确使用控件状态。
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