3

所以我已经用尽了我能找到的所有帮助,但仍然很难过。

我在转发器中有一个 DDL,我需要在同一个转发器中异步回发并更新更新面板:

            <asp:Repeater ID="rptOverdue" runat="server" 
            OnItemDataBound="setUpDateActionsSpecial">
            <ItemTemplate>
                <div class="theActions clearfix overdue edit hiddenrepeater" id='action_<%# Eval("item_id")%>'>
                    <span class="actionid"><%# Eval("item_id") %></span>          
                    <div class="actiontitle">      
                        <asp:TextBox ID="tbTitle" CssClass="theTitle" runat="server" Text='<%# Eval("item_title") %>' />
                    </div>
                    <div class="actionicons">
                        <a href="#" onclick='cancelUpdateAction(<%# Eval("item_id") %>)'><i class="icon-remove-sign actioniconcancel"></i></a>      
                        <a href="#" onclick='commitUpdateAction(<%# Eval("item_id") %>)'><i class="icon-ok-sign actioniconok"></i></a>   
                    </div>
                    <div class="actiondate">
                        <div class="input-append date" id="dp_<%# Eval("item_id") %>" data-date="<%= String.Format("{0:yyyy-MM-dd}", DateTime.Now) %>" data-date-format="yyyy-mm-dd">
                            <asp:TextBox ID="when2" CssClass="span2 theDuedate" size="16" type="text" name="when" placeholder="Due Date" runat="server" Text='<%# String.Format("{0:yyy-MM-dd}",Eval("item_duedate")) %>' />
                            <span class="add-on"><i class="icon-th"></i></span>
                        </div> 
                    </div>
                    <div class="actionmeta">      
                        <asp:DropDownList ID="ddlUpdateArea" CssClass="ddlUpdateArea" runat="server"></asp:DropDownList>
                        <asp:UpdatePanel ID="upDdlGoal" runat="server" UpdateMode="always">
                            <ContentTemplate>
                                <asp:DropDownList ID="ddlUpdateGoal" CssClass="ddlUpdateGoal" runat="server"></asp:DropDownList>
                            </ContentTemplate>
                            <Triggers>
                            </Triggers>
                        </asp:UpdatePanel>
                        <asp:UpdatePanelAnimationExtender ID="ae" runat="server" TargetControlID="upDdlGoal">
                             <Animations>
                                <OnUpdating>
                                    <FadeOut Duration=".3"  Fps="20" minimumOpacity=".5" />
                                </OnUpdating>
                                <OnUpdated>
                                    <sequence>
                                        <FadeIn Duration=".3"  Fps="20" minimumOpacity=".5" />
                                        <ScriptAction Script="  $('.goaliconplus').tooltip({ placement: 'top', trigger: 'hover', title: 'Add' });
                                                                $('.goaliconeye').tooltip({ placement: 'top', trigger: 'hover', title: 'Edit' });
                                                                $('.actioniconlist').tooltip({ placement: 'top', trigger: 'hover', title: 'View list' });
                                                                $('.actioniconnote').tooltip({ placement: 'top', trigger: 'hover', title: 'View note' });
                                                                $('.actioniconeye').tooltip({ placement: 'top', trigger: 'hover', title: 'Edit' });
                                                                $('.actionicondelete').tooltip({ placement: 'top', trigger: 'hover', title: 'Delete' });
                                                                $('.actioniconcomplete').tooltip({ placement: 'top', trigger: 'hover', title: 'Complete' });
                                                                scrollItemList();" />
                                    </sequence>
                                </OnUpdated>
                             </Animations>
                        </asp:UpdatePanelAnimationExtender>
                    </div>                                          
                </div>  
            </ItemTemplate>
        </asp:Repeater>

我在中继器的 ItemDataBound 事件中设置了触发器和自动回发等:

    protected void setUpDateActionsSpecial(object sender, RepeaterItemEventArgs e)
    {
        if ((e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem))
        {
            // Bind DDLs
            DropDownList ddlAreas = (DropDownList)e.Item.FindControl("ddlUpdateArea");
            DropDownList ddlGoals = (DropDownList)e.Item.FindControl("upDdlGoal").FindControl("ddlUpdateGoal");
            UpdatePanel upDdlGoal = (UpdatePanel)e.Item.FindControl("upDdlGoal");

            DataRowView drv = e.Item.DataItem as DataRowView;

            ddlAreas.DataSource = (DataTable)Session["arealist"]; ;
            ddlAreas.DataTextField = "area_title";
            ddlAreas.DataValueField = "area_id";
            ddlAreas.DataBind();
            ddlAreas.SelectedValue = drv["goal_area"].ToString();

            // Register Area DDL for postback
            ddlAreas.SelectedIndexChanged += updateTheGoals;
            ddlAreas.AutoPostBack = true;

            AsyncPostBackTrigger trigger = new AsyncPostBackTrigger();
            trigger.ControlID = ddlAreas.UniqueID;
            trigger.EventName = "SelectedIndexChanged";
            upDdlGoal.Triggers.Add(trigger);


            if (ScriptManager.GetCurrent(Page).IsInAsyncPostBack)
            {
                triggerInitMethod.Invoke(trigger, null);
            }

            DataTable goalTable = (DataTable)Session["goallist"];
            DataRow[] goalsDR = goalTable.Select("goal_area = " + ddlAreas.SelectedValue);
            DataTable goalFiltered = goalTable.Clone();

            foreach (DataRow row in goalsDR)
            {
                goalFiltered.ImportRow(row);
            }
            goalFiltered.AcceptChanges();

            ddlGoals.DataSource = goalFiltered;
            ddlGoals.DataTextField = "goal_title";
            ddlGoals.DataValueField = "goal_id";
            ddlGoals.DataBind();
            ddlGoals.SelectedValue = drv["item_goal"].ToString();

            litEmptyActionsDate.Visible = false;
        }
    }

这应该异步回发并在 updateTheGoals 事件处理程序中执行代码:

    protected void updateTheGoals(object sender, EventArgs e)
    {
        // Bind DDLs
        DropDownList ddlAreas = (DropDownList)sender;
        UpdatePanel thisUP = (UpdatePanel)ddlAreas.Parent.FindControl("upDdlGoal");
        DropDownList ddlGoals = (DropDownList)thisUP.FindControl("ddlUpdateGoal");

        DataTable goalTable = (DataTable)Session["goallist"];
        DataRow[] goalsDR = goalTable.Select("goal_area = 1024");// + ddlAreas.SelectedValue);
        DataTable goalFiltered = goalTable.Clone();

        foreach (DataRow row in goalsDR)
        {
            goalFiltered.ImportRow(row);
        }
        goalFiltered.AcceptChanges();

        ddlGoals.DataSource = goalFiltered;
        ddlGoals.DataTextField = "goal_title";
        ddlGoals.DataValueField = "goal_id";
        ddlGoals.DataBind();
        ddlGoals.Items.Insert(0, new ListItem("Choose a Goal", "0"));
        ddlGoals.SelectedValue = "Choose a Goal";

        thisUP.Update();
    }

实际发生的是更新面板似乎进行了更新(动画运行并完成),但 ddlUpdateGoal 下拉列表的实际内容并没有改变。它似乎正在执行异步回发,但实际上并未运行 SelectedIndexChanged 事件处理程序来更改更新面板的内容。

有没有人遇到过这个问题?(感谢所有帮助,在我在办公室启动显示器之前!)

谢谢,本

4

0 回答 0