使用存储过程从gridview中删除

Question

您好我有一个gridview，链接到sqldatasource。我添加了一个存储过程以从多个表中删除，然后在gridviews智能标记上启用删除。

当我点击删除按钮时，我收到一条错误消息，“对象必须实现IConvertible”。我读到将参数传递给存储过程是一个问题，可能是传递了错误的数据类型。我不确定我是否将参数传递给存储过程。参数应该是gridviews datakeyname，在这种情况下它是“UserId”。

存储过程在管理工作室中工作得很好，所以我认为它只是传递的参数（或者可能没有被传递）

我是否必须在后面的代码中编码参数以传递给存储过程？

<asp:SqlDataSource ID="selectUsers" runat="server" ConnectionString="<%$ ConnectionStrings:CASSFConnectionString %>"
        SelectCommand="SELECT aspnet_Membership.UserId, aspnet_Membership.IsLockedOut, aspnet_Membership.Email, aspnet_Membership.CreateDate, aspnet_Membership.LastLoginDate, aspnet_Membership.LastPasswordChangedDate, aspnet_Profile.PropertyValuesString, aspnet_Users.UserName, aspnet_Membership.IsApproved FROM aspnet_Membership INNER JOIN aspnet_Profile ON aspnet_Membership.UserId = aspnet_Profile.UserId INNER JOIN aspnet_Users ON aspnet_Membership.UserId = aspnet_Users.UserId AND aspnet_Profile.UserId = aspnet_Users.UserId WHERE (CONVERT (nvarchar(256), aspnet_Profile.PropertyValuesString) = @district)" 
        DeleteCommand="DeleteUsers" DeleteCommandType="StoredProcedure" UpdateCommand="UPDATE [aspnet_Membership] SET [IsApproved] = @IsApproved, [Email] = @email, [IsLockedOut] = @IsLockedOut WHERE [aspnet_Membership].[UserId] = @UserID">
        <SelectParameters>
            <asp:ControlParameter ControlID="DropDownList1" Name="district" PropertyName="SelectedValue" />
        </SelectParameters>
        <DeleteParameters>
            <asp:Parameter Name="UserId" Type="String" />
        </DeleteParameters>
        <UpdateParameters>
            <asp:Parameter Name="IsApproved" />
            <asp:Parameter Name="email" />
            <asp:Parameter Name="IsLockedOut" />
            <asp:Parameter Name="UserID" />
        </UpdateParameters>
    </asp:SqlDataSource>

Answer 1

找到答案，我刚从删除参数中删除Type="String"。