HyperLinkDataBindingHandler クラスとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

HyperLinkDataBindingHandler クラス

ハイパーリンクプロパティのデータ連結ハンドラを提供します。

名前空間: System.Web.UI.Design
アセンブリ: System.Design (system.design.dll 内)
構文

Visual Basic (宣言)

Public Class HyperLinkDataBindingHandler
    Inherits DataBindingHandler

Visual Basic (使用法)

Dim instance As HyperLinkDataBindingHandler

public class HyperLinkDataBindingHandler :
 DataBindingHandler

C++

public ref class HyperLinkDataBindingHandler
 : public DataBindingHandler

public class HyperLinkDataBindingHandler extends
 DataBindingHandler

JScript

public class HyperLinkDataBindingHandler extends
 DataBindingHandler

使用例

HyperLinkDataBindingHandler クラスから派生する CustomHyperLinkDataBindingHandler という名前のクラスを作成するコードの例を次に示します。このコードは、DataBindControl メソッドを使用して CustomHyperLink クラスのデザイン時データ連結を解決します。

Visual Basic

' 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 ' DataBindControl
End Class ' CustomHyperLinkDataBindingHandler

// 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