HyperLinkDataBindingHandler.DataBindControl(IDesignerHost, Control) Method

Reference

Definition

Namespace:: System.Web.UI.Design

Assembly:: System.Design.dll

Important

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Resolves design-time data-binding for the specified control.

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)

Parameters

designerHost: IDesignerHost

The IDesignerHost for the document that contains the control.

control: Control

The Control to data bind.

Examples

The following code example creates a class, named CustomHyperLinkDataBindingHandler, which derives from the HyperLinkDataBindingHandler class. It resolves design-time data binding for the ImageUrl property of the CustomHyperLink class so that placeholder text is displayed for the property when it is data-bound at design time.

// Derive a class from the HyperLinkDataBindingHandler. It will 
// resolve  data binding for the CustomHyperlink at design time.
public class CustomHyperLinkDataBindingHandler : 
    HyperLinkDataBindingHandler
{
    // Override the DataBindControl to set property values in  
    // the DataBindingCollection at design time.
    public override void DataBindControl(IDesignerHost designerHost, 
        Control control)
    {
        DataBindingCollection bindings = 
            ((IDataBindingsAccessor)control).DataBindings;
        DataBinding imageBinding = bindings["ImageUrl"];

           // If Text is empty, supply a default value.
        if (!(imageBinding == null))
        {
            CustomHyperLink hype = (CustomHyperLink)control;
            hype.ImageUrl = "Image URL.";
        }

        // Call the base method to bind the control.
        base.DataBindControl(designerHost, control);
    } // DataBindControl
} // CustomHyperLinkDataBindingHandler

' Derive a class from the HyperLinkDataBindingHandler. It will 
' resolve  data binding for the CustomHyperlink at design time.
Public Class CustomHyperLinkDataBindingHandler
    Inherits HyperLinkDataBindingHandler

    ' Override the DataBindControl to set property values in  
    ' the DataBindingCollection at design time.
    Public Overrides Sub DataBindControl( _
        ByVal designerHost As IDesignerHost, ByVal control As Control)

        Dim bindings As DataBindingCollection = _
            CType(control, IDataBindingsAccessor).DataBindings
        Dim imageBinding As DataBinding = bindings("ImageUrl")

        If Not (imageBinding Is Nothing) Then
            Dim hLink As CustomHyperLink = CType(control, CustomHyperLink)
            hLink.ImageUrl = "Image URL."
        End If

        MyBase.DataBindControl(designerHost, control)
    End Sub
End Class

Remarks

This method determines whether the Text and NavigateUrl properties of the HyperLink control are data-bound. If the Text property is data-bound, this method sets the value of the property to "DataBound". If the NavigateUrl property is data-bound, this method sets the value of the property to a text string so the control will have the appearance of a working hyperlink.

Applies to

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