Repeater.OnBubbleEvent(Object, EventArgs) 方法

参考

定义

命名空间:: System.Web.UI.WebControls

程序集:: System.Web.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

如果 EventArgs 参数是 ItemCommand 的实例，则引发 RepeaterCommandEventArgs 事件。

protected:
 override bool OnBubbleEvent(System::Object ^ sender, EventArgs ^ e);

protected override bool OnBubbleEvent (object sender, EventArgs e);

override this.OnBubbleEvent : obj * EventArgs -> bool

Protected Overrides Function OnBubbleEvent (sender As Object, e As EventArgs) As Boolean

参数

sender: Object

事件源。

e: EventArgs

包含事件数据的 EventArgs 对象。

Boolean

如果引发了 ItemCommand，则为 true；否则为 false。

示例

下面的代码示例演示如何重写 OnDataBinding 自定义服务器控件中的方法，以便在事件参数为命令类型时， Repeater 控件始终调用 OnItemCommand 并弹出事件，或者返回 false 并取消事件。

<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head>
    <title>Custom Repeater - OnBubbleEvent - 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 - OnBubbleEvent - C# Example</h3>
      <aspSample:CustomRepeaterOnBubbleEvent 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:CustomRepeaterOnBubbleEvent>
    </form>
  </body>
</html>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
    <head>
        <title>Custom Repeater - OnBubbleEvent - 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 - OnBubbleEvent - VB.NET Example</h3>
            
            <aspSample:CustomRepeaterOnBubbleEvent 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:CustomRepeaterOnBubbleEvent>
        </form>
    </body>
</html>

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

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomRepeaterOnBubbleEvent : System.Web.UI.WebControls.Repeater
  {
    protected override bool OnBubbleEvent(object source, System.EventArgs args)
    {
      // If the EventArgs are of type RepeaterCommandEventArgs,
      // then call the OnItemCommand event handler and return true (bubble up the event)
      // else return false (don't bubble up the event).
      bool isHandled = false;
      if (args is System.Web.UI.WebControls.RepeaterCommandEventArgs) 
      {
        this.OnItemCommand((System.Web.UI.WebControls.RepeaterCommandEventArgs)args);
        isHandled = true;
      }
      return isHandled;
    }
  }
}

Imports System.Web
Imports System.Security.Permissions

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

        Protected Overrides Function OnBubbleEvent(ByVal [source] As Object, ByVal args As System.EventArgs) As Boolean

            ' If the EventArgs are of type RepeaterCommadnEventArgs,
            ' then call the OnItemCommand event handler and return true (bubble up the event)
            ' else return false (don't bubble up the event).
            Dim isHandled As Boolean = False
            If TypeOf args Is System.Web.UI.WebControls.RepeaterCommandEventArgs Then
                Me.OnItemCommand(CType(args, System.Web.UI.WebControls.RepeaterCommandEventArgs))
                isHandled = True
            End If
            Return isHandled
        End Function
    End Class
End Namespace

适用于

另请参阅

Repeater Web Server 控件概述

通过

Repeater.OnBubbleEvent(Object, EventArgs) 方法

定义

参数

返回

示例

适用于

另请参阅

其他资源