绑定到LINQ To SQL数据源上的GridView，更新数据报错

[PacificBlue]

在VS 2008中，使用LINQ To SQL作为数据访问接口，并将此数据源绑定到一个GridView控件上，当将每个Column的UpdateCheck属性设置为Always的时候，无法在页面上更新任何数据，报：Row not found or changed. 这是一个Concurrency异常，但奇怪的是，除我之外，没有任何人在访问后台DB。但当把所有Column的UpdateCheck属性设定为Never时，便可以正常更新。很想请教一下各位，有谁碰到过这样的问题，您是怎么解决的？

Table的定义如下：
CREATE TABLE [dbo].[P_SHOP](
[Shop_ID] [int] IDENTITY(1,1) NOT NULL,
[Shop_Code] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL,
[Shop_Name] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL,
[Shop_Address] [varchar](255) COLLATE Chinese_PRC_CI_AS NULL,
[Shop_Tel] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL,
[Shop_Manager] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL,
[Dealer_Code] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL,
[CreateDate] [smalldatetime] NULL,
[CreateUser] [varchar](20) COLLATE Chinese_PRC_CI_AS NULL,
[IsDeleted] [bit] NULL,
CONSTRAINT [PK_P_SHOP_1] PRIMARY KEY CLUSTERED
(
[Shop_ID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]

非常感谢各位！

[PacificBlue]

另外，页面Code如下：

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Shop.ascx.cs" Inherits="DotNetNuke.Modules.EasternCamel.Shop" %>
<asp:LinqDataSource ID="LDS_Shop" runat="server"
ContextTypeName="EasternCamel.EasternCamelDataContext" EnableDelete="True"
EnableInsert="True" EnableUpdate="True" TableName="P_SHOP"
StoreOriginalValuesInViewState="False" oninserted="LDS_Shop_Inserted"
onupdating="LDS_Shop_Updating">
</asp:LinqDataSource>
<asp:GridView ID="GV_Shop" runat="server" AllowPaging="True"
AllowSorting="True" AutoGenerateColumns="False" CellPadding="4"
DataSourceID="LDS_Shop" ForeColor="#333333" GridLines="None"
DataKeyNames="Shop_ID">
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<Columns>
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
<asp:BoundField DataField="Shop_Code" HeaderText="店铺编号"
SortExpression="Shop_Code" />
<asp:BoundField DataField="Shop_Name" HeaderText="店铺名称"
SortExpression="Shop_Name" />
<asp:BoundField DataField="Shop_Address" HeaderText="详细地址"
SortExpression="Shop_Address" />
<asp:BoundField DataField="Shop_Tel" HeaderText="联系电话"
SortExpression="Shop_Tel" />
<asp:BoundField DataField="Shop_Manager" HeaderText="店铺经理"
SortExpression="Shop_Manager" />
<asp:BoundField DataField="Dealer_Code" HeaderText="所属代理商"
SortExpression="Dealer_Code" />
</Columns>
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#999999" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>

[kbryant]

帮你顶到解决

[PacificBlue]

Hi kbryant，多谢！

[namhyuk]

LINQ不会，让高手们看看吧。