最近工作中写了几个存储过程,需要向存储过程中传递字符串,因为
SQL Server 2000
中没有内置类似于
split
的函数,只好自己处理,将前台数据集中的一列用逗号拆分存到一个
List<string>
中,再转化为字符串传给存储过程,很是麻烦。今天看了下
SQL Server 2008
的新特性,发现有表变量的使用,及其将
DataTable
作为参数的用法,就尝试了一下,简单谈谈心得。
一、测试环境
1、Windows Server 2008 R2 DataCenter
2、Visual Studio 2008 Team System With SP1
3、SQL Server 2008 Enterprise Edition With SP1
由于是SQL Server 2008新特性,所以只能用2008。
二、测试概述
测试项目很简单,就是添加新用户
三、准备数据
1、建立数据库、表、类型、存储过程
代码
1
IF
NOT
EXISTS
(
SELECT
*
FROM
dbo.sysobjects
WHERE
id
=
OBJECT_ID
(
'
Users
'
)
AND
OBJECTPROPERTY
(id, N
'
IsUserTable
'
)
=
1
)
2 BEGIN
3 CREATE TABLE dbo.Users
4 (
5 UserID INT IDENTITY ( - 1 , - 1 ) NOT NULL ,
6 UserName VARCHAR ( 20 ) NOT NULL ,
7 UserPass VARCHAR ( 20 ) NOT NULL ,
8 Sex BIT NULL ,
9 Age SMALLINT NULL ,
10 CONSTRAINT PK_Users_UserID PRIMARY KEY (UserID)
11 )
12 END
13 IF NOT EXISTS ( SELECT * FROM sys.table_types WHERE name = ' UserTable ' AND is_user_defined = 1 )
14 BEGIN
15 CREATE TYPE UserTable AS TABLE
16 (
17 UserName VARCHAR ( 20 ) NOT NULL ,
18 UserPass VARCHAR ( 20 ) NOT NULL ,
19 Sex BIT NULL ,
20 Age SMALLINT NULL
21 )
22 END
23 GO
24
2 BEGIN
3 CREATE TABLE dbo.Users
4 (
5 UserID INT IDENTITY ( - 1 , - 1 ) NOT NULL ,
6 UserName VARCHAR ( 20 ) NOT NULL ,
7 UserPass VARCHAR ( 20 ) NOT NULL ,
8 Sex BIT NULL ,
9 Age SMALLINT NULL ,
10 CONSTRAINT PK_Users_UserID PRIMARY KEY (UserID)
11 )
12 END
13 IF NOT EXISTS ( SELECT * FROM sys.table_types WHERE name = ' UserTable ' AND is_user_defined = 1 )
14 BEGIN
15 CREATE TYPE UserTable AS TABLE
16 (
17 UserName VARCHAR ( 20 ) NOT NULL ,
18 UserPass VARCHAR ( 20 ) NOT NULL ,
19 Sex BIT NULL ,
20 Age SMALLINT NULL
21 )
22 END
23 GO
24
代码
1
IF
EXISTS
(
SELECT
*
FROM
dbo.sysobjects
WHERE
id
=
OBJECT_ID
(
'
sp_InsertSingleUser
'
)
AND
OBJECTPROPERTY
(id, N
'
IsProcedure
'
)
=
1
)
2 BEGIN
3 DROP PROCEDURE dbo.sp_InsertSingleUser
4 END
5 GO
6 CREATE PROCEDURE dbo.sp_InsertSingleUser
7 (
8 @User UserTable READONLY
9 )
10 AS
11
12 SET XACT_ABORT ON
13 BEGIN TRANSACTION
14
15 INSERT INTO dbo.Users(UserName, UserPass, Sex, Age)
16 SELECT UserName, UserPass, Sex, Age FROM @User
17
18 COMMIT TRANSACTION
19 SET XACT_ABORT OFF
20 GO
2 BEGIN
3 DROP PROCEDURE dbo.sp_InsertSingleUser
4 END
5 GO
6 CREATE PROCEDURE dbo.sp_InsertSingleUser
7 (
8 @User UserTable READONLY
9 )
10 AS
11
12 SET XACT_ABORT ON
13 BEGIN TRANSACTION
14
15 INSERT INTO dbo.Users(UserName, UserPass, Sex, Age)
16 SELECT UserName, UserPass, Sex, Age FROM @User
17
18 COMMIT TRANSACTION
19 SET XACT_ABORT OFF
20 GO
前台搭建好表单,后台主要是一个函数:
代码
1
public
void
fnInsertSingleUser(DataTable v_dt)
2 {
3 try
4 {
5 SqlConnection cn = new SqlConnection(CONN);
6 SqlCommand cmd = cn.CreateCommand();
7 cmd.CommandType = CommandType.StoredProcedure;
8 cmd.CommandText = @" sp_InsertSingleUser " ;
9 SqlParameter p = cmd.Parameters.AddWithValue( " @User " , v_dt);
10
11 DataSet ds = new DataSet();
12 SqlDataAdapter da = new SqlDataAdapter(cmd);
13 da.Fill(ds);
14 }
15 catch (Exception ex)
16 {
17 throw ex;
18 }
19 }
2 {
3 try
4 {
5 SqlConnection cn = new SqlConnection(CONN);
6 SqlCommand cmd = cn.CreateCommand();
7 cmd.CommandType = CommandType.StoredProcedure;
8 cmd.CommandText = @" sp_InsertSingleUser " ;
9 SqlParameter p = cmd.Parameters.AddWithValue( " @User " , v_dt);
10
11 DataSet ds = new DataSet();
12 SqlDataAdapter da = new SqlDataAdapter(cmd);
13 da.Fill(ds);
14 }
15 catch (Exception ex)
16 {
17 throw ex;
18 }
19 }
点击【添加】按钮时调用存储过程。测试是完成了,也很简单,传递一个DataTable做参数确实很方便吧,能够轻松完成原先需要很多编码的工 作。关于表变量还是有些道道的,如创建时判断其是否存在的语句,删除表变量前需要先删除引用表变量的存储过程等。一般开发我大多会选择用临时表,处理起来 比较方便,表变量可以作为存储过程参数确实是一个独特的优势,希望在SQL Server的未来版本中能够继续增强对表变量和临时表的支持,尤其是早日支持临时表调试:)
转载于:https://www.cnblogs.com/zhangchenliang/archive/2011/05/19/2050752.html