using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using System.Collections;
using System.Data;
namespace TestWindow
{
public class StoreProcedure
{
// 连接字符串。
private string connectionString;
// 存储过程名称。
private string storeProcedureName;
//// <summary>
/// 初始化 DataAccessHelper.StoreProceduer 对象。
/// </summary>
/// <param name="connectionString">数据库连接字符串。</param>
public StoreProcedure(string connectionString)
{
this.connectionString = connectionString;
}
//// <summary>
/// 初始化 DataAccessHelper.StoreProceduer 对象。
/// </summary>
/// <param name="connectionString">数据库连接字符串。</param>
/// <param name="storeProcedureName">存储过程名称。</param>
public StoreProcedure(string storeProcedureName, string connectionString)
{
this.connectionString = connectionString;
this.storeProcedureName = storeProcedureName;
}
//// <summary>
/// 获取或设置存储过程名称。
/// </summary>
public string StoreProcedureName
{
get { return this.storeProcedureName; }
set { this.storeProcedureName = value; }
}
//// <summary>
/// 执行操作类(Insert/Delete/Update)存储过程。
/// </summary>
/// <param name="paraValues">传递给存储过程的参数值列表。</param>
/// <returns>受影响的行数。</returns>
public int ExecuteNonQuery(params object[] paraValues)
{
using (SqlConnection connection = new SqlConnection(this.connectionString))
{
SqlCommand command = this.CreateSqlCommand(connection);
try
{
this.DeriveParameters(command);
this.AssignParameterValues(command, paraValues);
connection.Open();
int affectedRowsCount = command.ExecuteNonQuery();
return affectedRowsCount;
}
catch
{
throw;
}
}
}
//// <summary>
/// 执行存储过程,返回 System.Data.DataTable。
/// </summary>
/// <param name="paraValues">传递给存储过程的参数值列表。</param>
/// <returns>包含查询结果的 System.Data.DataTable。</returns>
public DataTable ExecuteDataTable(params object[] paraValues)
{
using (SqlConnection connection = new SqlConnection(this.connectionString))
{
SqlCommand command = this.CreateSqlCommand(connection);
try
{
this.DeriveParameters(command);
this.AssignParameterValues(command, paraValues);
SqlDataAdapter adapter = new SqlDataAdapter(command);
DataTable dataTable = new DataTable();
adapter.Fill(dataTable);
return dataTable;
}
catch
{
throw;
}
}
}
//// <summary>
/// 执行存储过程,填充指定的 System.Data.DataTable。
/// </summary>
/// <param name="dataTable">用于填充查询结果的 System.Data.DataTable。</param>
/// <param name="paraValues">传递给存储过程的参数值列表。</param>
public void ExecuteFillDataTable(DataTable dataTable, params object[] paraValues)
{
using (SqlConnection connection = new SqlConnection(this.connectionString))
{
SqlCommand command = this.CreateSqlCommand(connection);
try
{
this.DeriveParameters(command);
this.AssignParameterValues(command, paraValues);
connection.Open();
SqlDataAdapter adapter = new SqlDataAdapter(command);
adapter.Fill(dataTable);
}
catch
{
throw;
}
}
}
//// <summary>
/// 执行存储过程返回 System.Data.SqlClient.SqlDataReader,
/// 在 System.Data.SqlClient.SqlDataReader 对象关闭时,数据库连接自动关闭。
/// </summary>
/// <param name="paraValues">传递给存储过程的参数值列表。</param>
/// <returns>包含查询结果的 System.Data.SqlClient.SqlDataReader 对象。</returns>
public SqlDataReader ExecuteDataReader(params object[] paraValues)
{
using (SqlConnection connection = new SqlConnection(this.connectionString))
{
SqlCommand command = this.CreateSqlCommand(connection);
try
{
this.DeriveParameters(command);
this.AssignParameterValues(command, paraValues);
connection.Open();
return command.ExecuteReader(CommandBehavior.CloseConnection);
}
catch
{
throw;
}
}
}
//// <summary>
/// 执行查询,并返回查询所返回的结果集中第一行的第一列。忽略其他列或行。
/// </summary>
/// <param name="paraValues">传递给存储过程的参数值列表。</param>
/// <returns>结果集中第一行的第一列或空引用(如果结果集为空)。</returns>
public object ExecuteScalar(params object[] paraValues)
{
using (SqlConnection connection = new SqlConnection(this.connectionString))
{
SqlCommand command = this.CreateSqlCommand(connection);
try
{
this.DeriveParameters(command);
this.AssignParameterValues(command, paraValues);
connection.Open();
object result = command.ExecuteScalar();
//string r = command.Parameters[1].Value.ToString();
return result;
}
catch
{
throw;
}
}
}
//// <summary>
/// 从在 System.Data.SqlClient.SqlCommand 中指定的存储过程中检索参数信息并填充指定的
/// System.Data.SqlClient.SqlCommand 对象的 System.Data.SqlClient.SqlCommand.Parameters 集 合。
/// </summary>
/// <param name="sqlCommand">将从其中导出参数信息的存储过程的 System.Data.SqlClient.SqlCommand 对象。</param>
internal void DeriveParameters(SqlCommand sqlCommand)
{
try
{
sqlCommand.Connection.Open();
SqlCommandBuilder.DeriveParameters(sqlCommand);
sqlCommand.Connection.Close();
}
catch
{
if (sqlCommand.Connection != null)
{
sqlCommand.Connection.Close();
}
throw;
}
}
// 用指定的参数值列表为存储过程参数赋值。
private void AssignParameterValues(SqlCommand sqlCommand, params object[] paraValues)
{
if (paraValues != null)
{
if ((sqlCommand.Parameters.Count - 1) != paraValues.Length)
{
throw new ArgumentNullException("The number of parameters does not match number of values for stored procedure.");
}
for (int i = 0; i < paraValues.Length; i++)
{
sqlCommand.Parameters[i + 1].Value = (paraValues[i] == null) ? DBNull.Value : paraValues[i];
}
}
}
// 创建用于执行存储过程的 SqlCommand。
private SqlCommand CreateSqlCommand(SqlConnection connection)
{
SqlCommand command = new SqlCommand(this.storeProcedureName, connection);
command.CommandType = CommandType.StoredProcedure;
return command;
}
//-------------------------------------这一部分是我完善的,因为没有执行后返回存储过程中的返回值的函数-----------------------
/// <summary>
/// 执行存储过程,返回存储过程定义的返回值,注意存储过程中参数(paraValues)如果为返回值赋为空,其它值位置对应好
/// </summary>
/// <param name="output">返回存储过程中定义的返回值数组</param>
/// <param name="outParaNum">存储过程中返回值的个数</param>
/// <param name="paraValues">存储过程全部参数值</param>
public void ExecProcOutput(out object[] output, int outParaNum, params object[] paraValues)
{
using (SqlConnection connection = new SqlConnection(this.connectionString))
{
SqlCommand command = this.CreateSqlCommand(connection);
output = new object[outParaNum];//存储过程中返回值的个数
try
{
this.DeriveParameters(command);
this.AssignParameterValues(command, paraValues);
connection.Open();
command.ExecuteNonQuery();
for (int i = 0; i < outParaNum; i++)//将存储过程返回的参数值返回到程序中
{
output[i] = command.Parameters[1].Value;
}
}
catch
{
throw;
}
}
}
}
}
调用实例:
网上也没有个具体的调用实例,我这里加一个大家参考
存储过程:使用student数据库,数据很简单自己去看就可以了
创建存储过程:第一个是有返回值的,第二个是普通查询
if exists(select name from sysobjects where name='checkUserName' and type='p')
drop proc checkUserName
go
create proc checkUserName
(@checkResult int output,
@userName varchar(20),
@userID varchar(20))
as
if exists(select * from student_table where sname=@userName and studentID=@userID)
set @checkResult=1 --通过验证
else if exists(select * from student_table where sname=@userName)
set @checkResult=2 --用户密码错误
else
set @checkResult=0 --用户不存在
return isNull(@checkResult,2)
go
--以下是执行第一个存储过程在sql server 2005中
declare @checkResult int --声明一个返回值的变量
exec checkUserName @checkResult output,'g','123' --执行
select case @checkResult --select
when 1 then '成功'
when 0 then '不存在'
when 2 then '密码不正确'
end as '验证结果'
--第二个存储过程,普通查询
use student
if exists(select * from sysobjects where type='p' and name='studentProc')
drop proc studentProc
go
create proc studentProc
(@studentName varchar(20),
@studentID varchar(20))
as
select * from student_table where sname=@studentName and studentID=@studentID
--执行存储过程
go
exec studentProc 'g','123'
--------------------以下是在C# vs 2005中使用上面我面定义的类来执行存储过程------------
界面,很简单就是测试
private void button1_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand();
//---------注释部分是我普通的执行存储过程的语句,很繁琐吧...
//cmd.Connection = conn;
//conn.Open();
//cmd.CommandText = "checkUserName";
//cmd.CommandType = CommandType.StoredProcedure;
//cmd.Parameters.Add("@userName", SqlDbType.VarChar);
//cmd.Parameters["@userName"].Value = this.textBox1.Text.Trim();
//cmd.Parameters.Add("@userID", SqlDbType.VarChar);
//cmd.Parameters["@userID"].Value = this.textBox2.Text.Trim();
//cmd.Parameters.Add("@checkResult", SqlDbType.Int);
//cmd.Parameters["@checkResult"].Direction = ParameterDirection.Output;
//cmd.ExecuteNonQuery();studentProc
//---------使用执行存储过程帮手的类来完成.........简单啊!
StoreProcedure sp = new StoreProcedure("checkUserName", connString);//类的对象
Object[] paraValues = new object[3];//注意,这里是存储过程中全部的参数,一共有三个,还要注意顺序啊,返回值是第一个,那么赋值时第一个参数就为空
paraValues[1] = this.textBox1.Text.Trim();//从第二个参数开始赋值
paraValues[2] = this.textBox2.Text.Trim();
object[] output注意,这里是用来保存,存储过程中定义的返回值
sp.ExecProcOutput(out output,1, paraValues);//调用我们前面定义的方法,这里我就随便写了一个,能完成功能,大家改进
//object o = sp.ExecuteScalar(paraValues);//这个是查询的那个存储过程调用,很简单,不多说了
//---------下面就是验证了...看看,这样做是不是很简单的执行了存储过程.....
switch (Convert.ToInt32(output[0]))
{
case 0:
this.label4.Text = "用户不存在";
break;
case 1:
this.label4.Text = "登录成功";
break;
case 2:
this.label4.Text = "密码不正确";
break;
default:
break;
}
}
好了..就到这里...我这也是看贴子做完写点感受..也增加自己的印象.............积累中..............
Email:gaojun_le@163.com