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。
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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