数据库设计：
if exists (select * from dbo.sysobjects where id = object_id(N’[dbo].[Sp_Area_SelectAll]’) and OBJECTPROPERTY(id, N’IsProcedure’) = 1)
drop procedure [dbo].[Sp_Area_SelectAll]
GO
if exists (select * from dbo.sysobjects where id = object_id(N’[dbo].[Sp_Area_SelectAllWhereProvince]’) and OBJECTPROPERTY(id, N’IsProcedure’) = 1)
drop procedure [dbo].[Sp_Area_SelectAllWhereProvince]
GO
if exists (select * from dbo.sysobjects where id = object_id(N’[dbo].[Area]’) and OBJECTPROPERTY(id, N’IsUserTable’) = 1)
drop table [dbo].[Area]
GO
CREATE TABLE [dbo].[Area] (
[ID] [int] NOT NULL ,
[Province] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[City] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[其它] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
CREATE PROCEDURE Sp_Area_SelectAll
AS
SELECT DISTINCT Province
FROM Area
ORDER BY Province
RETURN
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
CREATE PROCEDURE Sp_Area_SelectAllWhereProvince
@Province varchar(50)
AS
SELECT Area.*
FROM Area
WHERE (Province = @Province)
RETURN
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
================================================〉
using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration; namespace Db
{
/// <summary>
/// Base 的摘要说明。
/// </summary>
public class Base
{
public Base()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
protected string con = ConfigurationSettings.AppSettings["dsn"];
protected SqlConnection conn;
protected SqlCommand cmd;
protected SqlDataReader dr;
protected string strSp;
protected SqlDataReader drSelectAll(string strSp)
{
conn = new SqlConnection(con);
cmd = new SqlCommand(strSp,conn);
cmd.CommandType = CommandType.StoredProcedure; conn.Open();
dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return dr;
}//返回一个SqlDataReader }
}