通过

ListControlDataBindingHandler.DataBindControl(IDesignerHost, Control) 方法

  • 参考

定义

命名空间:
System.Web.UI.Design.WebControls
程序集:
System.Design.dll

对指定的控件执行数据绑定。

public:
 override void DataBindControl(System::ComponentModel::Design::IDesignerHost ^ designerHost, System::Web::UI::Control ^ control);
public override void DataBindControl (System.ComponentModel.Design.IDesignerHost designerHost, System.Web.UI.Control control);
override this.DataBindControl : System.ComponentModel.Design.IDesignerHost * System.Web.UI.Control -> unit
Public Overrides Sub DataBindControl (designerHost As IDesignerHost, control As Control)

参数

designerHost
IDesignerHost

包含该控件的文档的 IDesignerHost。

control
Control

要绑定的 Control。

示例

下面的代码示例演示如何重写 方法， DataBindControl 以在绑定数据时向关联的 SimpleRadioButtonList 控件添加字符串消息。

此代码示例是为 ListControlDataBindingHandler 类提供的一个更大示例的一部分。

// Override the DataBindControl. 
public override void DataBindControl(IDesignerHost designerHost, 
    Control control)
{
    // Create a reference, named dataSourceBinding, 
    // to the control DataSource binding.
    DataBinding dataSourceBinding = 
        ((IDataBindingsAccessor)control).DataBindings["DataSource"];

    // If the binding exists, create a reference to the
    // list control, clear its ListItemCollection, and then add
    // an item to the collection.
    if (! (dataSourceBinding == null))
    {
        SimpleRadioButtonList simpleControl = 
            (SimpleRadioButtonList)control;

        simpleControl.Items.Clear();
        simpleControl.Items.Add("Data-bound Radio Button.");
    }
} // DataBindControl

' Override the DataBindControl.
Public Overrides Sub DataBindControl( _
ByVal designerHost As IDesignerHost, _
ByVal control As Control)

    ' Create a reference, named dataSourceBinding,
    ' to the control's DataSource binding.
    Dim dataSourceBinding As DataBinding _
        = CType( _
        control, _
        IDataBindingsAccessor).DataBindings("DataSource")

    ' If the binding exists, create a reference to the
    ' list control, clear its ListItemCollection, and then add
    ' an item to the collection.
    If Not (dataSourceBinding Is Nothing) Then
        Dim simpleControl As SimpleRadioButtonList = _
            CType(control, SimpleRadioButtonList)

        simpleControl.Items.Clear()
        simpleControl.Items.Add("Data-bound Radio Button.")
    End If
End Sub

注解

ListControl如果 指定的control控件在其 DataBindings 属性中指定了数据源，则 DataBindControl 该方法将Items清除 的 ListControl集合，然后添加一条字符串消息，指示 ListControl 是绑定到集合Items的数据。

适用于

另请参阅