Repeater.OnDataBinding-Methode

Artikel
08/20/2007

Diese Methode unterstützt die .NET Framework-Infrastruktur und ist nicht für die direkte Verwendung in Code bestimmt.

Löst das DataBinding-Ereignis aus.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

Syntax

'Declaration
Protected Overrides Sub OnDataBinding ( _
    e As EventArgs _
)
'Usage
Dim e As EventArgs

Me.OnDataBinding(e)

protected override void OnDataBinding (
    EventArgs e
)

protected:
virtual void OnDataBinding (
    EventArgs^ e
) override

protected void OnDataBinding (
    EventArgs e
)

protected override function OnDataBinding (
    e : EventArgs
)

Parameter

e
Ein EventArgs-Objekt, das die Ereignisdaten enthält.

Beispiel

In den folgenden Codebeispielen wird veranschaulicht, wie die OnDataBinding-Methode in einem benutzerdefinierten Serversteuerelement überschrieben wird, damit für den Fall, dass das Ereignisargument ein Befehlstyp ist, das Repeater-Steuerelement immer OnItemCommand aufruft und ein Bubble erstellt oder false zurückgibt und das Ereignis abbricht.

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ Page Language="VB" AutoEventWireup="True" %>
<HTML>
    <HEAD>
        <title>Custom Repeater - OnDataBinding - VB.NET Example</title>
        <script language="VB" runat="server">
            Sub Page_Load(Sender As Object, e As EventArgs)
                If Not IsPostBack Then
                    Dim values As New ArrayList()
                    
                    values.Add(New PositionData("Microsoft", "Msft"))
                    values.Add(New PositionData("Intel", "Intc"))
                    values.Add(New PositionData("Dell", "Dell"))
                    
                    Repeater1.DataSource = values
                    Repeater1.DataBind()
                End If
            End Sub

            Public Class PositionData
                
                Private myName As String
                Private myTicker As String        
                
                Public Sub New(newName As String, newTicker As String)
                    Me.myName = newName
                    Me.myTicker = newTicker
                End Sub        
                
                Public ReadOnly Property Name() As String
                    Get
                        Return myName
                    End Get
                End Property        
                
                Public ReadOnly Property Ticker() As String
                    Get
                        Return myTicker
                    End Get
                End Property
            End Class
        </script>
    </HEAD>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Repeater - OnDataBinding - VB.NET Example</h3>
            
            <aspSample:CustomRepeaterOnDataBinding id="Repeater1" runat="server" >
                    <HeaderTemplate>
                        <table border="1" cellpadding="4" cellspacing="0">
                            <tr>
                                <th>Company</th>
                                <th>Symbol</th>
                            </tr>
                    </HeaderTemplate>
                    <ItemTemplate>
                        <tr>
                            <td> <%# DataBinder.Eval(Container.DataItem, "Name") %></td>
                            <td> <%# DataBinder.Eval(Container.DataItem, "Ticker") %></td>
                        </tr>
                    </ItemTemplate>
                    <FooterTemplate>
                        </table>

                    </FooterTemplate>
                </aspSample:CustomRepeaterOnDataBinding>
        </form>
    </body>
</HTML>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page Language="C#" AutoEventWireup="True" %>
<HTML>
  <HEAD>
    <title>Custom Repeater - OnDataBinding - C# Example</title>
    <script language="C#" runat="server">
      void Page_Load(Object Sender, EventArgs e) 
      {
        if (!IsPostBack) 
        {
          ArrayList values = new ArrayList();
          values.Add(new PositionData("Microsoft", "Msft"));
          values.Add(new PositionData("Intel", "Intc"));
          values.Add(new PositionData("Dell", "Dell"));

          Repeater1.DataSource = values;
          Repeater1.DataBind();
        }
      }

      public class PositionData 
      {
        private string name;
        private string ticker;

        public PositionData(string name, string ticker) 
        {
          this.name = name;
          this.ticker = ticker;
        }

        public string Name 
        {
          get 
          {
            return name;
          }
        }

        public string Ticker 
        {
          get 
          {
            return ticker;
          }
        }
      }
    </script>
  </HEAD>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom Repeater - OnDataBinding - C# Example</h3>
      <aspSample:CustomRepeaterOnDataBinding id="Repeater1" runat="server">
        <HeaderTemplate>
          <table border="1" cellpadding="4" cellspacing="0">
            <tr>
              <th>Company</th>
              <th>Symbol</th>
            </tr>
        </HeaderTemplate>
        <ItemTemplate>
          <tr>
            <td> <%# DataBinder.Eval(Container.DataItem, "Name") %></td>
            <td> <%# DataBinder.Eval(Container.DataItem, "Ticker") %></td>
          </tr>
        </ItemTemplate>
        <FooterTemplate>
            </table>

        </FooterTemplate>
      </aspSample:CustomRepeaterOnDataBinding>
    </form>
  </body>
</HTML>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<HTML>
  <HEAD>
    <title>Custom Repeater - OnDataBinding - VJ# Example</title>
    <script language="VJ#" runat="server">
        void Page_Load(Object Sender, EventArgs e) 
        {
            if (!get_IsPostBack()) {
                ArrayList values =  new ArrayList();
                values.Add(new PositionData("Microsoft", "Msft"));
                values.Add(new PositionData("Intel", "Intc"));
                values.Add(new PositionData("Dell", "Dell"));
                Repeater1.set_DataSource(values);
                Repeater1.DataBind();
            }
        } //Page_Load

        public class PositionData
        {
            private String name;
            private String ticker;
            
            public PositionData(String name, String ticker) 
            {
                this.name = name;
                this.ticker = ticker;
            } //PositionData

            /** @property 
             */
            public String get_Name()
            {
                return name;
            } //get_Name

            /** @property 
             */
            public String get_Ticker()
            {
                return ticker;
            } //get_Ticker
        } //PositionData
    </script>
  </HEAD>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom Repeater - OnDataBinding - VJ# Example</h3>
      <aspSample:CustomRepeaterOnDataBinding id="Repeater1" runat="server">
        <HeaderTemplate>
          <table border="1" cellpadding="4" cellspacing="0">
            <tr>
              <th>Company</th>
              <th>Symbol</th>
            </tr>
        </HeaderTemplate>
        <ItemTemplate>
          <tr>
            <td> <%# DataBinder.Eval(Container.get_DataItem(), "Name") %></td>
            <td> <%# DataBinder.Eval(Container.get_DataItem(), "Ticker") %></td>
          </tr>
        </ItemTemplate>
        <FooterTemplate>
            </table>

        </FooterTemplate>
      </aspSample:CustomRepeaterOnDataBinding>
    </form>
  </body>
</HTML>

Imports System.Web
Imports System.Security.Permissions

Namespace Samples.AspNet.VB.Controls
    <AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
    Public NotInheritable Class CustomRepeaterOnDataBinding
        Inherits System.Web.UI.WebControls.Repeater

        Protected Overrides Sub OnDataBinding(ByVal e As System.EventArgs)
            ' Raise the OnDataBinding event.
            MyBase.OnDataBinding(e)

            ' Clear out the controls collection and child viewstate.
            Me.Controls.Clear()
            Me.ClearChildViewState()

            ' Create a new control hierarchy.
            Me.CreateControlHierarchy(True)
            Me.ChildControlsCreated = True
        End Sub
    End Class
End Namespace

using System.Web;
using System.Security.Permissions;

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomRepeaterOnDataBinding : System.Web.UI.WebControls.Repeater
  {
    protected override void OnDataBinding(System.EventArgs e)
    {
      // Raise the OnDataBinding event.
      base.OnDataBinding(e);

      // Clear out the controls collection and child viewstate.
      this.Controls.Clear();
      this.ClearChildViewState();

      // Create a new control hierarchy.
      this.CreateControlHierarchy(true);
      this.ChildControlsCreated = true;
    }
  }
}

package Samples.AspNet.JSL.Controls; 

public class CustomRepeaterOnDataBinding
    extends System.Web.UI.WebControls.Repeater
{
    protected void OnDataBinding(System.EventArgs e)
    {
        // Raise the OnDataBinding event.
        super.OnDataBinding(e);
        // Clear out the controls collection and child viewstate.
        this.get_Controls().Clear();
        this.ClearChildViewState();
        // Create a new control hierarchy.
        this.CreateControlHierarchy(true);
        this.set_ChildControlsCreated(true);
    } //OnDataBinding
} //CustomRepeaterOnDataBinding

Plattformen

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Freigeben über

Repeater.OnDataBinding-Methode

Syntax

Parameter

Beispiel

Plattformen

Versionsinformationen

.NET Framework

Siehe auch

Referenz

Weitere Ressourcen

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