【问题标题】:Full postback triggered by LinkButton inside UpdatePanel由 UpdatePanel 中的 LinkBut​​ton 触发的完整回发
【发布时间】:2013-07-02 10:48:42
【问题描述】:

我在使用部分回发的更新面板中动态添加控件时遇到问题。我在后面的代码中动态生成了一些 LinkBut​​ton 并设置了它们的触发器,但是当我触发它们时,它们完全回发,即使 LinkBut​​ton 事件也不会被调用我解雇他们。他们被放置在'divPageNumber'中

*.aspx:

</asp:DataList>
               <table style="width: 100%">
                   <tr style="width: 10%">
                       <td>
                           <asp:LinkButton ID="lnkPrevious" runat="server" Font-Bold="True"
                               NavigateUrl="~/Default.aspx" OnClick="lnkPrevious_Click" Width="100px">&lt;&lt;صفحه قبل</asp:LinkButton>
                       </td>
                       <td style="width: 80%">
                           <div id="divPageNumber" dir="rtl" runat="server">
                           </div>
                       </td>
                       <td style="width: 10%">
                           <asp:LinkButton ID="lnkNext" runat="server" Font-Bold="True"
                               NavigateUrl="~/Default.aspx" OnClick="lnkNext_Click" Width="80px">صفحه بعد&gt;&gt;</asp:LinkButton>
                       </td>
                   </tr>
               </table>
           </ContentTemplate>
           <Triggers>
               <asp:AsyncPostBackTrigger ControlID="LinkButton1" EventName="Command"></asp:AsyncPostBackTrigger>
               <asp:AsyncPostBackTrigger ControlID="LinkButton2" EventName="Command" />
               <asp:AsyncPostBackTrigger ControlID="LinkButton3" EventName="Command" />
               <asp:AsyncPostBackTrigger ControlID="LinkButton4" EventName="Command" />
               <asp:AsyncPostBackTrigger ControlID="LinkButton5" EventName="Command" />
               <asp:AsyncPostBackTrigger ControlID="LinkButton6" EventName="Command" />
               <asp:AsyncPostBackTrigger ControlID="LinkButton7" EventName="Command" />
               <asp:AsyncPostBackTrigger ControlID="LinkButton0" EventName="Command" />
               <asp:AsyncPostBackTrigger ControlID="btnSearchHead" EventName="Command" />
               <asp:AsyncPostBackTrigger ControlID="LinkButton8" EventName="Command" />
               <asp:AsyncPostBackTrigger ControlID="lnkNext" EventName="Click" />
               <asp:AsyncPostBackTrigger ControlID="lnkPrevious" EventName="Click" />                   
           </Triggers>

       </asp:UpdatePanel>

和 *.cs:

LinkButton btnPage;
            for (int i = 1; i <= objPagedDataSource.PageCount; i++)
            {
                btnPage = new LinkButton();                    
                btnPage.ID = "btnPage" + i.ToString();                    
                if (i == GetCurrentPageNumber + 1)
                    btnPage.Font.Bold = true;
                btnPage.Width = 10;
                btnPage.Style["margin-right"] = "2px";
                btnPage.Style["margin-left"] = "2px";
                btnPage.Text = i.ToString();

                if (brand != "" && brand != null)
                    btnPage.PostBackUrl = "Default.aspx?brand=" + brand + "&Page=" + i.ToString();
                else if (model != "" && model != null)
                    btnPage.PostBackUrl = "Default.aspx?model=" + model + "&Page=" + i.ToString();
                else
                    btnPage.PostBackUrl = "Default.aspx?Page=" + i.ToString();

                divPageNumber.Controls.Add(btnPage);

                LinkButton lb = (LinkButton)divPageNumber.FindControl("btnPage" + i.ToString());
                lb.Click += new EventHandler(lnkdel_OnClick);

                //Creates a new async trigger
                AsyncPostBackTrigger trigger = new AsyncPostBackTrigger();
                trigger.ControlID = lb.UniqueID;
                trigger.EventName = "Click";
                UpdatePanel1.Triggers.Add(trigger);

                ScriptManager.GetCurrent(this).RegisterAsyncPostBackControl(lb);
            }
            UpdatePanel1.Update();

protected void lnkdel_OnClick(object sender, EventArgs e)
    {

    }
    protected void lnkPrevious_Click(object sender, EventArgs e)
    {
        //GetCurrentPageNumber -= 1;
        //BindDataToRepeter();
        Response.Redirect("Default.aspx?Page=" + (Convert.ToInt32(Page.Request["Page"]) - 1).ToString());
    }
    protected void lnkNext_Click(object sender, EventArgs e)
    {
        //GetCurrentPageNumber += 1;
        //BindDataToRepeter();

        Response.Redirect("Default.aspx?Page=" + (Convert.ToInt32(Page.Request["Page"]) + 1).ToString());
    }

'lnkNext' 和 'lnkPrevious' 是静态添加和工作的。但“lnkdel_OnClick”不起作用。

我在做什么?

谢谢

【问题讨论】:

  • 就完整回发而言,这是设计使然。即使在部分回发期间,页面的所有生命周期事件仍会执行。更多信息,encosia.com/are-you-making-these-3-common-aspnet-ajax-mistakes
  • 我看不懂这篇文章,你能帮我修复一下我的代码吗?
  • 当您说完整回发时,您的意思是您看到回发发生(页面被重新加载),还是您没有看到回发发生但所有页面生命周期事件都被触发?
  • 当我触发 'lnkNext' 或 'lnkPrevious' 并且动态按钮发生 Load 事件时,Load 事件中有此代码:if(!Page.IsPostBack){} ,但是当我触发动态按钮时 IsPostBack 为 true。但是静态的按钮 IsPostBack 是 false

标签: asp.net asp.net-ajax updatepanel linkbutton


【解决方案1】:

我通过这个帖子解决了我的问题

http://forums.asp.net/t/1895457.aspx/1

【讨论】:

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