HyperLinkDataBindingHandler Klas

Definitie

public ref class HyperLinkDataBindingHandler : System::Web::UI::Design::DataBindingHandler

public class HyperLinkDataBindingHandler : System.Web.UI.Design.DataBindingHandler

type HyperLinkDataBindingHandler = class
    inherit DataBindingHandler

Public Class HyperLinkDataBindingHandler
Inherits DataBindingHandler

Overname

Object

DataBindingHandler

HyperLinkDataBindingHandler

Voorbeelden

In het volgende codevoorbeeld wordt een klasse gemaakt met de naam CustomHyperLinkDataBindingHandler, die is afgeleid van de HyperLinkDataBindingHandler klasse. Hiermee wordt de ontwerptijdgegevensbinding voor de CustomHyperLink klasse omgezet met behulp van de DataBindControl methode.

// 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