DataBindingHandlerAttribute Constructeurs

public:
 DataBindingHandlerAttribute();

public DataBindingHandlerAttribute ();

Public Sub New ()

Exemples

L’exemple de code suivant utilise le DataBindingHandlerAttribute constructeur.

// The following example uses the Default
// DataBindingHandlerAttribute constructor.
using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Security.Permissions;

namespace MyTextCustomControl
{
   [ DataBindingHandlerAttribute() ]
   [AspNetHostingPermission(SecurityAction.Demand, 
      Level=AspNetHostingPermissionLevel.Minimal)]
   public sealed class MyTextBox : TextBox
   {
      protected override void Render(HtmlTextWriter output)
      {
         output.Write("This class uses the DataBindingHandlerAttribute class.");
      }
   }
}

' The following example uses the Default
' DataBindingHandlerAttribute constructor.
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Security.Permissions

Namespace MyTextCustomControl

 <DataBindingHandlerAttribute()>  _
 <AspNetHostingPermission(SecurityAction.Demand, _
   Level:=AspNetHostingPermissionLevel.Minimal)> _
 Public NotInheritable Class MyTextBox
   Inherits TextBox
   
   Protected Overrides Sub Render(output As HtmlTextWriter)
      output.Write("This class uses the DataBindingHandlerAttribute class.")
   End Sub

 End Class
End Namespace 'MyTextCustomControl

public:
 DataBindingHandlerAttribute(System::String ^ typeName);

public DataBindingHandlerAttribute (string typeName);

new System.Web.UI.DataBindingHandlerAttribute : string -> System.Web.UI.DataBindingHandlerAttribute

Public Sub New (typeName As String)

Paramètres

Exemples

L’exemple de code suivant utilise le DataBindingHandlerAttribute constructeur pour désigner une classe personnalisée DataBindingHandler pour le contrôle Web.

// The following example uses the 
// DataBindingHandlerAttribute(String) constructor to designate
// the custom DataBindingHandler class, named MyDataBindingHandler,
// for the custom MyWebControl class.
using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.Design;
using System.ComponentModel.Design;
using System.Security.Permissions;

namespace MyTextCustomControl
{
   [ DataBindingHandlerAttribute("MyTextCustomControl.MyDataBindingHandler") ]
   [AspNetHostingPermission(SecurityAction.Demand, 
      Level=AspNetHostingPermissionLevel.Minimal)]
   public sealed class MyWebControl : WebControl
   {
      protected override void Render(HtmlTextWriter output)
      {
         output.Write("This class uses the DataBindingHandlerAttribute class.");
      }
   }

   public class MyDataBindingHandler : TextDataBindingHandler
   {
      public override void DataBindControl(IDesignerHost host, Control myControl)
      {
         ((TextBox)myControl).Text = "Added by MyDataBindingHandler";
      }
   }
}

' The following example uses the 
' DataBindingHandlerAttribute(String) constructor to designate
' the custom DataBindingHandler class, named MyDataBindingHandler,
' for the custom MyWebControl class.
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.Design
Imports System.ComponentModel.Design
Imports System.Security.Permissions

Namespace MyTextCustomControl

 <DataBindingHandlerAttribute("MyTextCustomControl.MyDataBindingHandler")>  _
 <AspNetHostingPermission(SecurityAction.Demand, _
   Level:=AspNetHostingPermissionLevel.Minimal)> _
 Public NotInheritable Class MyWebControl
   Inherits WebControl
   
   Protected Overrides Sub Render(output As HtmlTextWriter)
      output.Write("This class uses the DataBindingHandlerAttribute class.")
   End Sub
 End Class


 Public Class MyDataBindingHandler
   Inherits TextDataBindingHandler
   
   Public Overrides Sub DataBindControl(host As IDesignerHost, myControl As Control)
      CType(myControl, TextBox).Text = "Added by MyDataBindingHandler"
   End Sub
 End Class
End Namespace 'MyTextCustomControl

Remarques

Le nom de type de ce constructeur est le nom complet du type, y compris son nom d’assembly.

public:
 DataBindingHandlerAttribute(Type ^ type);

public DataBindingHandlerAttribute (Type type);

new System.Web.UI.DataBindingHandlerAttribute : Type -> System.Web.UI.DataBindingHandlerAttribute

Public Sub New (type As Type)

Paramètres

Exemples

L’exemple de code suivant définit un gestionnaire de liaison de données, nommé MyDataBindingHandler, à utiliser par le concepteur en mode édition. Lors de la sortie du mode d’édition, la Text valeur de la propriété s’affiche.

using System;
using System.Collections;
using System.Web.UI;
using System.Web.UI.Design;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.ComponentModel.Design;

namespace CustomControls
{
  [
    DataBindingHandler(typeof(MyDataBindingHandler)),
    ToolboxData("<{0}:MyLabel runat=server></{0}:MyLabel>")
  ]
  public class MyLabel : Label 
  {
    public  MyLabel()
    { 
      // Insert your code here.
    } 
  }

  public class MyDataBindingHandler : DataBindingHandler
  {
    public override void DataBindControl(IDesignerHost host, Control control)
    {
      ((Label)control).Text = "Added by data binding handler.";
    }
  }
}

Namespace CustomControls

  <DataBindingHandler(GetType(MyDataBindingHandler)), ToolboxData("<{0}:MyLabel runat=server></{0}:MyLabel>")>  _
    Public Class MyLabel
      Inherits Label
      
      Public Sub New()
        'Insert your code here.
      End Sub
      
    End Class
   
    Public Class MyDataBindingHandler
      Inherits DataBindingHandler
      
      Public Overrides Sub DataBindControl(host As IDesignerHost, control As Control)
         CType(control, Label).Text = "Added by data binding handler."
      End Sub
      
    End Class
    
End Namespace 'CustomControls

Remarques

La syntaxe de cet attribut est la suivante :

[DataBindingHandlerAttribute  
  (typeof(dataBindingHandlerType))]