在Ajax Accordion中为网格视图添加超链接

Question

在我的第一个问题中，我开始向网格视图添加超链接。现在，我将相同的网格视图封装在Ajax协议中。不幸的是，它使我添加超链接的方法变得无用，因为OnRowDataBound方法返回以下错误：

"无法将类型为"System.Web.UI.LitectControl"的对象强制转换为类型System.Web.UI.WebControls.HyperLink'。"

在线：

HyperLink nameHl = (HyperLink)e.Row.Cells[0].Controls[0];

现在我尝试了：

NavigateUrl='<%# "http://websitelink" + DataBinder.Eval(Container.DataItem,"Name") %>'

方式，但链接后缀的命名约定，以及我需要如何用"+"替换空格。这对我的项目不起作用。此外，网站链接可能并不总是相同的，所以我宁愿在服务器端定义超链接，而不是在客户端定义超链接。

如有任何帮助，我们将不胜感激。我的代码如下：

客户端：

<asp:Accordion ID="Accordion1" runat="server" FadeTransitions="true" Width="935px" 
 SuppressHeaderPostbacks="true" OnItemDataBound="Accordion1_ItemDataBound" 
 CssClass="acc-content" HeaderCssClass="acc-header" HeaderSelectedCssClass="acc-selected" TransitionDuration="250" FramesPerSecond="40" RequireOpenedPane="False">
 <HeaderTemplate>
        <%#DataBinder.Eval(Container.DataItem,"Rpt_Grouping") %>
 </HeaderTemplate>
 <ContentTemplate>
        <asp:HiddenField ID="hlbl_categoryID" runat="server" Value='<%#DataBinder.Eval(Container.DataItem,"Rpt_Grouping") %>' />
        <asp:GridView ID="accGvReportList" runat="server" RowStyle-BackColor="#ededed" RowStyle-HorizontalAlign="Left" AutoGenerateColumns="false" GridLines="None" CellPadding="2" CellSpacing="2" Width="100%" OnRowDataBound="accGvReportList_RowDataBound">
               <Columns>
                     <asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderText="Report Name" HeaderStyle-BackColor="#d1d1d1" HeaderStyle-ForeColor="#777777">
                           <ItemTemplate>
                                   <asp:HyperLink ID="contentLink" runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"Name") %>' />
                           </ItemTemplate>
                     </asp:TemplateField>
                     <asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderText="Report Description" HeaderStyle-BackColor="#d1d1d1" HeaderStyle-ForeColor="#777777">
                           <ItemTemplate>
                                   <%#DataBinder.Eval(Container.DataItem, "Description")%>
                           </ItemTemplate>
                     </asp:TemplateField>
               </Columns>
         </asp:GridView>
     </ContentTemplate></asp:Accordion>

服务器端：

        // binds the DB table to the grid inside the accordion tool 
    protected void Accordion1_ItemDataBound(object sender, AjaxControlToolkit.AccordionItemEventArgs e)
    {
        if (e.ItemType == AjaxControlToolkit.AccordionItemType.Content)
        {
            string listPath = "/subcat%";
            string categoryValue = ((HiddenField)e.AccordionItem.FindControl("hlbl_categoryID")).Value;
            DataTable dtReportList = objInfoDal.getReportListDetails(listPath, ddlFolders.SelectedValue.ToString(), categoryValue);
            GridView grd = new GridView();
            grd = (GridView)e.AccordionItem.FindControl("accGvReportList");
            grd.DataSource = dtReportList;
            grd.DataBind();
        }
    }
    // hyperlink binding by row for first column in gridview in the accordion tool
    protected void accGvReportList_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        //Changes text in the first column into HyperLinks
        HyperLinkField nameLink = gvReportList.Columns[0] as HyperLinkField;
        string linkPath = "http://websitelink";
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            //applies a unique suffix to the address depending on the link name
            HyperLink nameHl = (HyperLink)e.Row.Cells[0].Controls[0];
            string nameText = nameHl.Text;
            string linkSuffix = nameText.Replace(" ", "+");
            nameHl.NavigateUrl = linkPath + linkSuffix;
        }
    }

Answer 1

我能够通过更换来修复错误

HyperLink nameHl = (HyperLink)e.Row.Cells[0].Controls[0];

带有

HyperLink nameHl = ((HyperLink)(e.Row.FindControl("contentLink")));

asp.net论坛主题的解决方案：将代码绑定的GridView中的字段转换为超链接