3

为什么Repeater 中的按钮不会触发Repeater 的ItemCommand 事件?有没有办法强迫它这样做?ViewState 已启用。

在下面的代码中,btnApprove 和 btnDelete 是有问题的按钮:

<asp:Repeater runat="server" ID="rpt1" onitemdatabound="rpt1_ItemDataBound" onitemcommand="rpt1_ItemCommand" >
    <ItemTemplate>
        <table width="100%" style="margin-bottom:6px;">
            <tr>
                <td>
                    <asp:CheckBox ID="chkSelected" runat="server" Text=" " TextAlign="Right"/> Select
                    <asp:Button ID="btnApprove" runat="server" Width="80px" Text="Approve" />
                    <asp:Button ID="btnDelete" runat="server" Width="80px" Text="Delete" />
                </td>                                                                   
            </tr>
            <tr>
                <td align="right">
                    <asp:Label ID="lblCommentStatus" runat="server" Text="Label"></asp:Label>
                </td>
            </tr>
        </table>
        <table width="100%" style="margin-top:6px;">
            <tr>
                <td><asp:Label ID="lblAuthorName" runat="server" Text="Author: " Width="60px"></asp:Label></td>
                <td><asp:TextBox ID="txtAuthorName" runat="server" Width="250px"></asp:TextBox></td>
                <td style="padding-left: 30px;"><asp:Label ID="lblAuthorLocation" runat="server" Text="Location: " Width="70px"></asp:Label></td>
                <td><asp:TextBox ID="txtAuthorLocation" runat="server" Width="250px"></asp:TextBox></td>
            </tr>
        </table>
        Title: <asp:TextBox ID="txtTitle" runat="server" Width="640px" Enabled="False"></asp:TextBox>
        Body: <asp:TextBox ID="txtBody" runat="server" Width="640px" TextMode="MultiLine" Height="60px" Enabled="False"></asp:TextBox>
        <table width="100%" style="margin-top:6px;">
            <tr>
                <td><asp:Label ID="lblVotes" runat="server" Text="Votes: " Width="80px"></asp:Label></td>
                <td><asp:Label ID="lblVotesCount" runat="server" Text="" Width="600px"></asp:Label></td>
            </tr>
        </table>
        <hr style="margin-top:20px; margin-bottom:20px;" />
    </ItemTemplate>
</asp:Repeater>

/// <summary>
  /// Handles the ItemCommand event of the rpt1 control.
  /// </summary>
  /// <param name="source">The source of the event.</param>
  /// <param name="e">The <see cref="System.Web.UI.WebControls.RepeaterCommandEventArgs"/> instance containing the event data.</param>
  protected void rpt1_ItemCommand(object source, RepeaterCommandEventArgs e)
  {
    var c1 = CommentRepository.GetById(Convert.ToUInt64(e.CommandArgument.ToString()));

    if (e.CommandName == "approve")
    {
      c1.Approved = true;
      c1.ApprovationUserId = WebAdminContext.RelatedUserId;
    }

    if (e.CommandName == "reject")
    {
      c1.Approved = false;
      c1.ApprovationUserId = 0;
    }

    if (e.CommandName == "delete")
    {
      c1.Deleted = true;
      c1.DeletionUserId = WebAdminContext.RelatedUserId;
    }

    if (e.CommandName == "restore")
    {
      c1.Deleted = false;
      c1.DeletionUserId = 0;
    }

    CommentRepository.Update(c1);

    ResetSubSequenceInfo();
    BindList();
      }

/// <summary>
  /// Binds the list.
  /// </summary>
  private void BindList()
  {
    _Criteria = lcb1.GenerateCriteriaFromUI();

    var sc1 = CommentRepository.Filter(
      new FilteringOptions(
        EntityListPager1.CurrentSubSequenceInfo,
        null,
        CommentRepository.GetCriteriaToFilterByTGID(CurrentEntityGEODEReference.GID).And(_Criteria)
        )
      );

    // BIND
    rpt1.DataSource = sc1.Items;
    rpt1.DataBind();

    EntityListPager1.BindToUI(sc1.Info);
  }
4

3 回答 3

15

编辑:根据您的其他评论,听起来您在每次回发时都重新绑定了转发器。当您这样做时,您会破坏ItemCommand的事件源 - 与客户端单击的按钮相关联的原始中继器项目。

用户从下拉列表中选择“已批准”或“已删除”,单击搜索(回发),BindList() 将数据源绑定到新结果。

您可以在下拉列表的处理程序中重新绑定转发器,只需确保您在“批准”或“删除”按钮启动的执行路径期间没有这样做。


可能还有另一个问题,但您肯定需要为按钮指定命令名称才能使该代码正常工作:

<asp:Button ID="btnApprove" runat="server" Width="80px" Text="Approve" CommandName="approve"/>
<asp:Button ID="btnDelete" runat="server" Width="80px" Text="Delete" CommandName="delete"/>

我无法重现该问题:您确定ItemCommand处理程序甚至没有触发吗?使用稍微修改过的代码版本,rpt1_ItemCommand当我单击“批准”或“删除”时,我的方法显然正在执行,它只是没有遇到任何情况,因为这些按钮没有定义命令名称。

于 2010-03-26T15:33:42.790 回答
9

什么时候绑定中继器?如果您手动执行此操作,请确保仅在页面不是回发时绑定它。

请提供更多代码

于 2010-03-26T15:14:15.040 回答
1

正如其他 2 篇文章所描述的

  • 不要在 PostBack 上重新绑定
  • 确保在 Button 上设置 CommandName 属性

And another problem i had, was having EnableViewState property on the Repeater set to false, it needs to be set to true.

于 2011-12-01T11:05:23.557 回答