嵌套的Repeater和Gridview设置中的CollapsiblePanelExtender不起作用

时间:2011-11-26 02:25:16

标签: asp.net gridview nested repeater collapsiblepanelextender

我有一个使用三层嵌套的设置:一个Repeater,其中的项目使用CollapsiblePanelExtenders(工作),每个都包含一个GridView。其中每个都包含另一个GridView,它由另一个CollapsiblePanelExtender控制。仅当我将clientState设置为True时,这些内部CollapsiblePanel才会有效地显示展开或折​​叠状态。但是,它们没有像预期的那样有效地扩展或崩溃。一切都是动态绑定的。

这是标记......

<asp:Repeater ID="cat_repeater" runat="server">
  <ItemTemplate>
    <asp:CollapsiblePanelExtender id="cat_cpExt" runat="server" TargetControlID="cat_pnl" CollapsedSize="0" Collapsed="false" CollapsedImage="collapsed.png" ExpandedImage="expanded.png" ExpandControlID="cpControl_pnl" CollapseControlID="cpControl_pnl" TextLabelID="cpControl_lbl" ImageControlID="cpControl_img" CollapsedText='<%#configCPText(eval("Title"), False)%>' ExpandedText='<%#configCPText(eval("Title"), True) %>' />
    <asp:Panel ID="cpControl_pnl" runat="server" Visible='<%#itemVisible(eval("ID"), "Recipients", "CategoryID") %>' CssClass="CPanelStyle">
      <asp:Image ID="cpControl_img" runat="server" ImageUrl="expanded.png" />
      <asp:Label ID="cpControl_lbl" runat="server" Text='<%#configCPText(eval("Title"), True) %>' CssClass="CPanelText" />
    </asp:Panel>
    <asp:Panel ID="cat_pnl" runat="server">
      <asp:GridView ID="recipients_gv" runat="server" CssClass="GVStyle" HeaderStyle-CssClass="GVHeaderStyle" RowStyle-CssClass="GVItemStyle" AutoGenerateColumns="false" GridLines="none" AllowPaging="false">
        <Columns>
          <asp:TemplateField HeaderText="Name" SortExpression="Last Name" ItemStyle-CssClass="GVNameStyle">
            <ItemTemplate>
              <asp:Literal id="name_lit" runat="server" text='<%#formatNameText(eval("FirstName"), eval("LastName")) %>' />
            </ItemTemplate>
          </asp:TemplateField>
          <asp:TemplateField HeaderText="Gifts" ItemStyle-Width="500px">
            <ItemTemplate>
              <asp:CollapsiblePanelExtender id="gifts_cpExt" runat="server" TargetControlID="gifts_pnl" CollapsedSize="0" Collapsed="true" CollapsedImage="collapsed.png" ExpandedImage="expanded.png" ExpandControlID="cpControl_pnl2" CollapseControlID="cpControl_pnl2" TextLabelID="cpControl_lbl2" ImageControlID="cpControl_img2" CollapsedText='<%#configGiftsCPText(eval("ID"), True)%>' ExpandedText='<%#configGiftsCPText(eval("ID"), False) %>' />
              <asp:Panel ID="cpControl_pnl2" runat="server" Visible='<%#itemVisible(eval("ID"), "Gifts", "RecipientID") %>'>
                <asp:Image ID="cpControl_img2" runat="server" ImageUrl="collapsed.png" />
                <asp:Label ID="cpControl_lbl2" runat="server" Text='<%#configGiftsCPText(eval("ID"), False) %>' />
              </asp:Panel>
              <asp:Panel ID="gifts_pnl" runat="server">
                <asp:GridView ID="gifts_gv" runat="server" DataKeyNames="ID" RowStyle-CssClass="GVInnerItemStyle" HeaderStyle-CssClass="GVInnerHeaderStyle" Gridlines="None" AutoGenerateColumns="false" AllowPaging="false" Width="475px">
                  <Columns>
                    <asp:TemplateField ItemStyle-CssClass="GVInnerButtonItemStyle" HeaderText="Description">
                      <ItemTemplate>
                        <asp:LinkButton ID="gift_lBtn" runat="server" Text='<%#eval("Description") %>' CommandName="Select" />
                      </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Complete" ItemStyle-Width="50px">
                      <ItemTemplate>
                        <asp:CheckBox ID="giftComplete_cbx" runat="server" Checked='<%#eval("Complete") %>' />
                      </ItemTemplate>
                    </asp:TemplateField>
                  </Columns>
                </asp:GridView>
              </asp:Panel>
            </ItemTemplate>
          </asp:TemplateField>
        </Columns>
      </asp:GridView>
    </asp:Panel>
    <br />
  </ItemTemplate>
</asp:Repeater>

......这是绑定所有内容的代码:

Protected Sub bindCategories()

    Try
        oCmd.Connection = oConn
        oCmd.CommandType = CommandType.Text

        strSQL = "SELECT * FROM Categories"

        oCmd.CommandText = strSQL
        oDA.SelectCommand = oCmd

        oDA.Fill(oDTbl)

        cat_repeater.DataSource = oDTbl
        cat_repeater.DataBind()

        For i As Integer = 0 To oDTbl.Rows.Count - 1


            oCmd.Parameters.Clear()
            inner_dTbl.Clear()

            strSQL = "SELECT *, Title FROM Recipients INNER JOIN Categories on Recipients.CategoryID = Categories.ID WHERE CategoryID = @CategoryID ORDER BY LastName"

            oParam = New SqlParameter
            oParam.ParameterName = "CategoryID"
            oParam.SqlDbType = SqlDbType.Int
            oParam.Value = oDTbl.Rows(i)("ID")
            oCmd.Parameters.Add(oParam)

            oCmd.CommandText = strSQL
            oDA.SelectCommand = oCmd

            oDA.Fill(inner_dTbl)

            Dim gv As GridView = CType(cat_repeater.Items(i).FindControl("recipients_gv"), GridView)
            gv.DataSource = inner_dTbl
            gv.DataBind()

            For j As Integer = 0 To inner_dTbl.Rows.Count - 1

                oCmd.Parameters.Clear()
                gifts_dTbl.Clear()

                strSQL = "SELECT * FROM Gifts WHERE RecipientID = @RecipientID ORDER BY Description"

                oParam = New SqlParameter
                oParam.ParameterName = "RecipientID"
                oParam.SqlDbType = SqlDbType.Int
                oParam.Value = inner_dTbl.Rows(j)("ID")
                oCmd.Parameters.Add(oParam)

                oCmd.CommandText = strSQL
                oDA.SelectCommand = oCmd

                oDA.Fill(gifts_dTbl)

                Dim inner_gv As GridView = CType(gv.Rows(j).FindControl("gifts_gv"), GridView)
                inner_gv.DataSource = gifts_dTbl
                inner_gv.DataBind()

                Dim cpExt As CollapsiblePanelExtender = CType(gv.Rows(j).FindControl("gifts_cpExt"), CollapsiblePanelExtender)
                cpExt.Collapsed = True
                cpExt.ClientState = True

            Next

        Next
    Catch ex As Exception
        Throw ex
    End Try

End Sub

我已经成功地在2级嵌套GridView设置中使用了CollapsiblePanelExtenders,之前没有问题,也没有设置clientState。但是,我之前必须在使用带有中继器的CollapsiblePanelExtenders时指定clientState。

有没有人有任何关于为什么这些扩展程序无法在这个3级嵌套设置中运行的输入?

1 个答案:

答案 0 :(得分:0)

看起来它需要的原因是因为它需要一个回发来使所有逻辑工作:

if (this.SupportsClientState) {
  ScriptManager.RegisterHiddenField(this, this.ClientStateFieldID, this.SaveClientState());
  this.Page.RegisterRequiresPostBack(this);
}

这是来自AjaxControlToolkit空间中的public class ScriptControlBase

您是否将其包装在UpdatePanel中?是否会导致回发在转发器中使用CPE?自从我尝试在转发器中进行CPE以来,已经有一段时间了,而且我现在还没有设置检查代码并构建一个。

有没有理由你不能只使用完全客户端的东西,只是使用javascript扩展/折叠它们?当这些事情扩展时,您是否在服务器端动态加载数据?