Html 下拉列表框作为DataGrid中的EditTemplate-未绑定

我不知道谁来绑定网格视图的编辑模板中使用的dropdownlist。我得到的错误是“附加信息：数据绑定：'System.Data.DataRowView'不包含名为'Type'的属性”。下面是网格视图的摘录

        <asp:TemplateField HeaderText="Type *" SortExpression="Type">
            <EditItemTemplate>
                <asp:DropDownList ID="ddlTypeEdit" runat="server" DataSourceID="SqlDataSourceType" DataTextField="Code" DataValueField="LookupValuesID" SelectedValue='<%# Bind("Code") %>'>
                </asp:DropDownList>
                <asp:RequiredFieldValidator ID="RequiredFieldValidatorddlTypeEdit" runat="server" ErrorMessage="Type is required" ControlToValidate="ddlTypeEdit"></asp:RequiredFieldValidator>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label3" runat="server" Text='<%# Bind("Code") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>

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由于select查询不包含类型字段，您似乎遇到了此错误。如果您修改您的查询，以遵循我认为它会工作得很好。注意，在FROM关键字前面添加了[tbl\u Lease\u Agrmnt].[Type]

SELECT [tbl_Lease_Agrmnt].[LeaseAgrmntID], [tbl_Lease_Agrmnt].[SalesOrderID], [tbl_Lease_Agrmnt].[SerialNo], [tlkp_Lookup_Values].[Code], [tbl_Lease_Agrmnt].[ContractNo], [tbl_Lease_Agrmnt].[ScheduleNo], [tbl_Lease_Agrmnt].[StartDate], [tbl_Lease_Agrmnt].[Term], [tbl_Lease_Agrmnt].[Hours], [tbl_Lease_Agrmnt].[Rate], [tbl_Lease_Agrmnt].[ReturnDate], [tbl_Lease_Agrmnt].[CloseDate], [tbl_Lease_Agrmnt].[ExtensionStartDate], [tbl_Lease_Agrmnt].[ExtensionTerm], [tbl_Lease_Agrmnt].[Type] FROM [tbl_Lease_Agrmnt] LEFT JOIN [tlkp_Lookup_Values] ON [tbl_Lease_Agrmnt].[Type] = [tlkp_Lookup_Values].[LookupValuesID] WHERE ([SalesOrderID] = @SalesOrderID) ORDER BY [LeaseAgrmntID]

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当我添加字段时，出现以下错误…“ddlTypeEdit”有一个SelectedValue，该值无效，因为它不存在于项目列表中。参数名称：value如果将SelectedValue=''更改为SelectedValue=“Code”，该怎么办？

SELECT [tbl_Lease_Agrmnt].[LeaseAgrmntID], [tbl_Lease_Agrmnt].[SalesOrderID], [tbl_Lease_Agrmnt].[SerialNo], [tlkp_Lookup_Values].[Code], [tbl_Lease_Agrmnt].[ContractNo], [tbl_Lease_Agrmnt].[ScheduleNo], [tbl_Lease_Agrmnt].[StartDate], [tbl_Lease_Agrmnt].[Term], [tbl_Lease_Agrmnt].[Hours], [tbl_Lease_Agrmnt].[Rate], [tbl_Lease_Agrmnt].[ReturnDate], [tbl_Lease_Agrmnt].[CloseDate], [tbl_Lease_Agrmnt].[ExtensionStartDate], [tbl_Lease_Agrmnt].[ExtensionTerm], [tbl_Lease_Agrmnt].[Type] FROM [tbl_Lease_Agrmnt] LEFT JOIN [tlkp_Lookup_Values] ON [tbl_Lease_Agrmnt].[Type] = [tlkp_Lookup_Values].[LookupValuesID] WHERE ([SalesOrderID] = @SalesOrderID) ORDER BY [LeaseAgrmntID]