在所选数据源上找不到名称为 'Id' 的字段或属性

Question

我不确定我在这里缺少什么？我刚刚更改了我的SQL语句，现在说它不阅读" ID"可以帮助我吗？

这是我的HTML代码：

<asp:GridView ID="gvCustomerOrders" runat="server" Width="940px"  HorizontalAlign="Center"
    AutoGenerateColumns="false"   AllowPaging="True" CssClass="table table-hover table-striped" OnPageIndexChanging="gvCustomerOrders_PageIndexChanging">
<Columns>
                    <asp:BoundField DataField ="Id" HeaderText ="Id" ItemStyle-Width="100" >
                    <ItemStyle Width="100px"></ItemStyle>
                    </asp:BoundField>
                    <asp:BoundField DataField ="CustomerName" HeaderText ="Name" />    
                    <asp:BoundField DataField ="CustomerPhoneNo" DataFormatString= "{0:(###) ###-####}" HeaderText ="PhoneNo" />
                    <asp:BoundField DataField ="CustomerEmailID" HeaderText ="Email" />
                    <asp:BoundField DataField ="Name" HeaderText ="Product" />
                    <asp:BoundField DataField ="TotalPrice" DataFormatString="{0:C2}" HeaderText ="Price" />

                    <asp:TemplateField>
                        <ItemTemplate>
                            <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl ='<%# Eval("Id", "~/Admin/OrderDetails.aspx?Id={0}") %>'
                                Text="View Details" Target="_blank" />
                        </ItemTemplate>
                        </asp:TemplateField>
</Columns>

和代码背后：

public void bindgrid()
    {
        SqlConnection conn = new SqlConnection("Data Source = 'PAULO'; Initial Catalog=ShoppingCartDB;Integrated Security =True");
        SqlCommand cmd = new SqlCommand("select DISTINCT STUFF((SELECT ',' + p.[name] FROM  Products p INNER JOIN CustomerProducts cp ON cp.ProductID = p.ProductID WHERE cp.CustomerID = cd.Id FOR XML PATH(''),TYPE).value('.','nvarchar(max)'),1,1,'') AS Name, cd.CustomerName, cd.CustomerEmailID ,cd.CustomerPhoneNo,cd.CustomerAddress ,cd.TotalPrice,cd.OrderDateTime, cd.PaymentMethod FROM CustomerDetails cd Inner Join CustomerProducts cp ON cp.CustomerID = cd.Id", conn);
        SqlDataAdapter da = new SqlDataAdapter("", conn);
        da.SelectCommand = new SqlCommand("select DISTINCT STUFF((SELECT ',' + p.[name] FROM  Products p INNER JOIN CustomerProducts cp ON cp.ProductID = p.ProductID WHERE cp.CustomerID = cd.Id FOR XML PATH(''),TYPE).value('.','nvarchar(max)'),1,1,'') AS Name, cd.CustomerName, cd.CustomerEmailID ,cd.CustomerPhoneNo,cd.CustomerAddress ,cd.TotalPrice,cd.OrderDateTime, cd.PaymentMethod FROM CustomerDetails cd Inner Join CustomerProducts cp ON cp.CustomerID = cd.Id", conn);
        DataSet ds = new DataSet();
        da.Fill(ds, "data");
        gvCustomerOrders.DataSource = ds.Tables[0].DefaultView;
        gvCustomerOrders.DataBind();
    }

真的为何会给我错误

而失去

A field or property with the name 'Id' was not found on the selected data source.

Answer 1

您的查询：

select DISTINCT STUFF((SELECT ',' + p.[name] FROM  Products p INNER JOIN CustomerProducts cp ON cp.ProductID = p.ProductID WHERE cp.CustomerID = cd.Id FOR XML PATH(''),TYPE).value('.','nvarchar(max)'),1,1,'') AS Name, cd.CustomerName, cd.CustomerEmailID ,cd.CustomerPhoneNo,cd.CustomerAddress ,cd.TotalPrice,cd.OrderDateTime, cd.PaymentMethod FROM CustomerDetails cd Inner Join CustomerProducts cp ON cp.CustomerID = cd.Id

不返回名为'Id'

的列

但是您在这里绑定Id列：

<asp:BoundField DataField ="Id" HeaderText ="Id" ItemStyle-Width="100" >

我猜您只需要在查询中包含客户表中的" ID"列：

select DISTINCT Id, STUFF((......

Answer 2

看到您有一个带有DataField ="Id"的<asp:BoundField../>，并且您使用的查询不会获取任何带有名称"Id的列，如果您获取该列，则表示该错误将解决。或在这种情况下不需要前端删除该BoundField。

注意： - 您应该在绑定集合中提供所有指定的DataField S，这意味着您应该通过查询