Once you create the controls and initialize the layout, the Form will ask the content provider to populate the Form controls with the data using the control IDs.
创建了控件并初始化布局之后，表单会用控件ID要求内容提供者用数据填充表单控件。
Because the drivers and providers are responsible for exposing data to data controls, it is important to ensure that the driver or provider supports the functionality that you need.
由于驱动程序和提供程序负责向数据控件公开数据，因此确保驱动程序或提供程序支持所需的功能很重要。
Defines a provider interface for connecting two server controls using a single field of data.
使用单一资料栏位，定义连接两个伺服器控制项的提供者介面。
Defines a provider interface for connecting two server controls using a single field of data.
使用单一资料栏位，定义连接两个伺服器控制项的提供者介面。
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