使用中继器显示数据困难

Question

我正在尝试使用中继器显示购物类别及其子类别和子类别。。数据正在绑定，但未显示。。有人能帮上忙吗？这是我的代码：

.aspx文件

<asp:Repeater ID="CategoryRepeater" runat="server" OnItemDataBound="CategoryRepeater_OnItemDataBound">
    <ItemTemplate>
        <a href='Clothing.aspx?CategoryId=<%#Eval("CategoryId") %>'<%#Eval("CategoryName") %>></a><br />
        <asp:Repeater ID="SubCategoryRepeater" runat="server" OnItemDataBound="SubCategoryRepeater_OnItemDataBound">
            <ItemTemplate>
                    <a href='Clothing.aspx?CategoryId=<%#Eval("CategoryId") %>&SubCategoryId=<%#Eval("SubCategoryId") %>'<%#Eval("SubCategoryName") %>></a><br />
                <asp:Repeater ID="SubSubCategoryRepeater" runat="server">
                    <ItemTemplate>
                        <a href='Clothing.aspx?CategoryId=<%#Eval("CategoryId") %>&SubCategoryId=<%#Eval("SubCategoryId") %>&SubSubCategoryId=<%#Eval("SubSubCategoryId") %>'<%#Eval("SubSubCategoryName") %>></a><br />
                    </ItemTemplate>
                </asp:Repeater>
            </ItemTemplate>
        </asp:Repeater>
    </ItemTemplate>
</asp:Repeater>

C#代码：

protected void CategoryRepeater_OnItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if ((e.Item.ItemType == ListItemType.Item)||(e.Item.ItemType == ListItemType.AlternatingItem))
    {
        DataRowView dataItem = e.Item.DataItem as DataRowView;
        int categoryId = Convert.ToInt32(dataItem["CategoryId"]);
        Repeater rp = (Repeater)e.Item.FindControl("SubCategoryRepeater");
        ds = us.SelectSubCategories(categoryId);
        rp.DataSource = ds;
        rp.DataBind();
    }
}
protected void SubCategoryRepeater_OnItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if ((e.Item.ItemType == ListItemType.Item)||(e.Item.ItemType == ListItemType.AlternatingItem))
    {
        DataRowView dataItem = e.Item.DataItem as DataRowView;
        int SubCategoryId = Convert.ToInt32(dataItem["SubCategoryId"]);
        Repeater rp1 = (Repeater)e.Item.FindControl("SubSubCategoryRepeater");
        ds1 = us.SelectSubSubCategories(SubCategoryId);
        rp1.DataSource = ds1;
        rp1.DataBind();
    }
}

Answer 1

检查源代码以确保没有任何内容输出到页面。我认为您只需要在锚点标记中呈现类别名称。

以下是简化了eval的相同代码，以了解的情况

<a href='Clothing.aspx?CategoryId={catid}'{name}></a>

应为：

<a href='Clothing.aspx?CategoryId={catid}'>{name}</a>

或

<a href='Clothing.aspx?CategoryId=<%#Eval("CategoryId") %>'><%#Eval("CategoryName") %></a>

三个地点都犯了同样的错误。

Answer 2

我认为代码中的一切都是正确的，但您的输出是错误的。

你正在这样做：

<a href='Clothing.aspx?CategoryId=<%#Eval("CategoryId") %>&SubCategoryId=<%#Eval("SubCategoryId") %>'<%#Eval("SubCategoryName") %>></a><br />

但它需要

<a href='Clothing.aspx?CategoryId=<%#Eval("CategoryId") %>&SubCategoryId=<%#Eval("SubCategoryId") %>'><%#Eval("SubCategoryName") %></a><br />

注意到我将">"移回<%#后面Eval（"子类别名称"）%>