f exists (select * from sysobjects where id = OBJECT_ID('[Citys]') and OBJECTPROPERTY(id, 'IsUserTable') = 1) DROP TABLE [Citys]
CREATE TABLE [Citys] (  [CityID] [int] IDENTITY (1, 1) NOT NULL , [Name] [nchar] (10) NULL ,  [ProvinceID] [int] NULL , [Code] [nchar] (20) NOT NULL )
ALTER TABLE [Citys] WITH NOCHECK ADD CONSTRAINT [PK_Citys] PRIMARY KEY  NONCLUSTERED ( [CityID] )

SET IDENTITY_INSERT [Citys] ON

INSERT [Citys] ( [CityID] , [Name] , [ProvinceID] , [Code] ) VALUES ( 6 , '济南    ' , 1 , 'jinan              ' )
INSERT [Citys] ( [CityID] , [Name] , [ProvinceID] , [Code] ) VALUES ( 7 , '青岛    ' , 1 , 'qingdao            ' )
INSERT [Citys] ( [CityID] , [Name] , [ProvinceID] , [Code] ) VALUES ( 8 , '泰安    ' , 1 , 'taian              ' )

SET IDENTITY_INSERT [Citys] OFF

if exists (select * from sysobjects where id = OBJECT_ID('[Modules]') and OBJECTPROPERTY(id, 'IsUserTable') = 1) DROP TABLE [Modules]
CREATE TABLE [Modules] (  [ModuleID] [int] IDENTITY (1, 1) NOT NULL , [Name] [nchar] (20) NULL , [Comments] [nchar] (50) NULL , [Code] [nchar] (20) NOT NULL )
ALTER TABLE [Modules] WITH NOCHECK ADD CONSTRAINT [PK_Modules] PRIMARY KEY  NONCLUSTERED ( [ModuleID] )

SET IDENTITY_INSERT [Modules] ON

INSERT [Modules] ( [ModuleID] , [Name] , [Code] ) VALUES ( 1 , '用户管理          ' , 'ManageModule      ' )
INSERT [Modules] ( [ModuleID] , [Name] , [Comments] , [Code] ) VALUES ( 2 , '用户组管理22      ' , '                                                ' , 'ModulesManager    ' )

SET IDENTITY_INSERT [Modules] OFF

if exists (select * from sysobjects where id = OBJECT_ID('[Provinces]') and OBJECTPROPERTY(id, 'IsUserTable') = 1) DROP TABLE [Provinces]
CREATE TABLE [Provinces] (  [ProvinceID] [int] IDENTITY (1, 1) NOT NULL , [Name] [nchar] (10) NULL , [Code] [nchar] (20) NOT NULL )
ALTER TABLE [Provinces] WITH NOCHECK ADD CONSTRAINT [PK_Provinces] PRIMARY KEY  NONCLUSTERED ( [ProvinceID] )

SET IDENTITY_INSERT [Provinces] ON

INSERT [Provinces] ( [ProvinceID] , [Name] , [Code] ) VALUES ( 1 , '山东    ' , 'shandong          ' )
INSERT [Provinces] ( [ProvinceID] , [Name] , [Code] ) VALUES ( 2 , '北京    ' , 'beijing            ' )
INSERT [Provinces] ( [ProvinceID] , [Name] , [Code] ) VALUES ( 3 , '上海    ' , 'shanghai          ' )

SET IDENTITY_INSERT [Provinces] OFF

if exists (select * from sysobjects where id = OBJECT_ID('[sysdiagrams]') and OBJECTPROPERTY(id, 'IsUserTable') = 1) DROP TABLE [sysdiagrams]
CREATE TABLE [sysdiagrams] ( [name] [nvarchar] (128) NOT NULL ,  [principal_id] [int] NOT NULL ,  [diagram_id] [int] IDENTITY (1, 1) NOT NULL ,  [version] [int] NULL , [definition] [image] NULL )
ALTER TABLE [sysdiagrams] WITH NOCHECK ADD CONSTRAINT [PK_sysdiagrams] PRIMARY KEY  NONCLUSTERED ( [diagram_id] )
CREATE UNIQUE INDEX [UK_principal_name] ON [sysdiagrams] ( principal_id )
CREATE UNIQUE INDEX [UK_principal_name] ON [sysdiagrams] ( name )

if exists (select * from sysobjects where id = OBJECT_ID('[UserGroups]') and OBJECTPROPERTY(id, 'IsUserTable') = 1) DROP TABLE [UserGroups]
CREATE TABLE [UserGroups] (  [GroupID] [int] IDENTITY (1, 1) NOT NULL , [Name] [nchar] (10) NULL , [Comments] [nchar] (100) NULL ,  [ModuleID] [int] NULL , [Code] [nchar] (20) NULL )
ALTER TABLE [UserGroups] WITH NOCHECK ADD CONSTRAINT [PK_UserGroups] PRIMARY KEY  NONCLUSTERED ( [GroupID] )

SET IDENTITY_INSERT [UserGroups] ON

INSERT [UserGroups] ( [GroupID] , [Name] , [Comments] , [ModuleID] , [Code] ) VALUES ( 1 , '普通用户 ' , '普通用户                                                                                          ' , 1 , 'pt                ' )
INSERT [UserGroups] ( [GroupID] , [Name] , [Comments] , [ModuleID] , [Code] ) VALUES ( 2 , '管理员1  ' , '管理员                                                                                            ' , 1 , 'admin              ' )

SET IDENTITY_INSERT [UserGroups] OFF

if exists (select * from sysobjects where id = OBJECT_ID('[UserGroupsModulesRelations]') and OBJECTPROPERTY(id, 'IsUserTable') = 1) DROP TABLE [UserGroupsModulesRelations]
CREATE TABLE [UserGroupsModulesRelations] (  [GroupID] [int] NOT NULL ,  [ModuleID] [int] NOT NULL )
ALTER TABLE [UserGroupsModulesRelations] WITH NOCHECK ADD CONSTRAINT [PK_UserGroupsModulesRelations] PRIMARY KEY  NONCLUSTERED ( [GroupID] )
CREATE UNIQUE CLUSTERED INDEX [PK_UserGroupsModulesRelation] ON [UserGroupsModulesRelations] ( ModuleID )

if exists (select * from sysobjects where id = OBJECT_ID('[Users]') and OBJECTPROPERTY(id, 'IsUserTable') = 1) DROP TABLE [Users]
CREATE TABLE [Users] (  [UserID] [int] IDENTITY (1, 1) NOT NULL , [UserName] [nchar] (50) NULL , [Password] [nchar] (50) NULL , [NickName] [nchar] (50) NULL ,  [GroupID] [int] NULL ,  [ProvinceID] [int] NULL ,  [CityID] [int] NULL , [EMail] [nchar] (50) NULL , [Question] [nchar] (20) NULL , [Answer] [nchar] (20) NULL , [Birthday] [nchar] (8) NULL , [RealName] [nchar] (10) NULL , [Sex] [bit] NULL )
ALTER TABLE [Users] WITH NOCHECK ADD CONSTRAINT [PK_Users] PRIMARY KEY  NONCLUSTERED ( [UserID] )

SET IDENTITY_INSERT [Users] ON

INSERT [Users] ( [UserID] , [UserName] , [Password] , [GroupID] , [ProvinceID] , [CityID] ) VALUES ( 2 , 'admin                                            ' , 'admin                                            ' , 1 , 1 , 6 )
INSERT [Users] ( [UserID] , [UserName] , [Password] , [NickName] , [EMail] , [Question] , [Answer] , [Birthday] , [Sex] ) VALUES ( 3 , 'tianyamoon                                      ' , '19820603                                        ' , '岳亮                                            ' , 'tiger133@163.com                                ' , '我就读的第一所学校的' , '                  ' , '1982010' , 0 )
INSERT [Users] ( [UserID] , [UserName] , [Password] , [NickName] , [EMail] , [Question] , [Answer] , [Birthday] , [Sex] ) VALUES ( 4 , 'tianyamoon                                      ' , '19820603                                        ' , '                                                ' , 'tiger133@163.com                                ' , '我就读的第一所学校的' , '                  ' , '1982010' , 0 )

SET IDENTITY_INSERT [Users] OFF

  SecurityDataContext db;
        protected void Page_Load(object sender, EventArgs e)
        {

            db = new SecurityDataContext();
            if (!IsPostBack)
            {
                BindGrid();
            }
        }   
private void BindGrid()
        {
            SecurityDataContext db = new SecurityDataContext();
            this.GridViewModules.DataSource = db.Modules.GetNewBindingList();
            this.GridViewModules.DataBind();
        }

<asp:GridView ID="GridViewModules" runat="server" AutoGenerateColumns="False">
            <Columns>
                <asp:BoundField DataField="Code" HeaderText="Code" />
                <asp:BoundField DataField="Name" HeaderText="Name" />
                <asp:BoundField DataField="Comments" HeaderText="Comments" />
                <asp:CommandField ShowDeleteButton="True" />
                <asp:CommandField ShowEditButton="True" ShowInsertButton="True" />
            </Columns>
        </asp:GridView>

  protected void GridViewModules_RowEditing(object sender, GridViewEditEventArgs e)
        {
            this.GridViewModules.EditIndex = e.NewEditIndex;
            BindGrid();
        }

    protected void GridViewModules_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            GridViewModules.EditIndex = -1;
            BindGrid();
        }

protected void GridViewModules_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            var a = db.Modules.Where(module => module.ModuleID.ToString() == GridViewModules.DataKeys[e.RowIndex].Values[0].ToString().Trim()).First();
            a.Name = ((TextBox)GridViewModules.Rows[e.RowIndex].Cells[1].Controls[0] as TextBox).Text;
            a.Code = ((TextBox)GridViewModules.Rows[e.RowIndex].Cells[0].Controls[0] as TextBox).Text;
            a.Comments = ((TextBox)GridViewModules.Rows[e.RowIndex].Cells[2].Controls[0] as TextBox).Text;
            db.SubmitChanges();
            GridViewModules.EditIndex = -1;
            BindGrid();
}

  protected void GridViewModules_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            var a = db.Modules.Where(module => module.ModuleID.ToString() == GridViewModules.DataKeys[e.RowIndex].Values[0].ToString().Trim()).First();
            db.Modules.DeleteOnSubmit(a);
            db.SubmitChanges();
            BindGrid();
        }

现在还缺少添加功能。
向界面添加3个TextBox控件并设置其ID，再添加一个按钮。其html代码为
        </div>
        <div>Name:<asp:TextBox ID="TextBoxName" runat="server"></asp:TextBox>       
        </div>
        <div>Comments:<asp:TextBox ID="TextBoxComments" runat="server"></asp:TextBox>       
        </div>
        <div>
            <asp:Button ID="ButtonAdd" runat="server" Text="添加" />
        </div>

为Button添加onclick事件
<asp:Button ID="ButtonAdd" runat="server" Text="添加" onclick="ButtonAdd_Click" />
修改其CS代码
        protected void ButtonAdd_Click(object sender, EventArgs e)
        {
            Modules m = new Modules()
            {
                Code = this.TextBoxCode.Text,
                Name = this.TextBoxName.Text,
                Comments = this.TextBoxComments.Text
            };
            SecurityDataContext db = new SecurityDataContext();
            if (db.Modules.Where(module => module.Code.Trim() == m.Code.Trim()).Count() > 0)//Linq
                throw new Exception("Code不能重复");
           
            db.Modules.InsertOnSubmit(m);
            db.SubmitChanges();
            BindGrid();
            this.TextBoxCode.Text = "";
            this.TextBoxName.Text = "";
            this.TextBoxComments.Text = "";
        }
这样就完成了对Modules的添加、修改、删除操作。