Asp.Net Oracle数据的通用操作类

在一个项目中，可能用到2种数据，比如说ORACLE ，MS_SQLSERVER 同时要用到，MS-SQL的数据通用类在很多的教程中都有现成的例子和代码，但是ORACLE比较少见，但是本次项目中正好用到，贴出来和大家一起共享。
这里用OraDbHelper.cs做常见的四种数据操作
一 ExecuteDataTable 返回到内存数据表
二 SqlDataReader 直接读数据
三 ExecuteScalar 获得一条数据
四 ExecuteNonQuery 对数据库执行增删改操作
环境：客户端WIN XP 安装的是ORACLE 8.17客户端
数据库服务器是：Red Hat Enterprise Linux AS 安装的是Oracle Database 10g
代码如下:

SQL*Plus: Release 8.1.7.0.0 - Production on 星期六 12月 19 18:10:19 2009 
(c) Copyright 2000 Oracle Corporation. All rights reserved. 
连接到: 
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production 
With the Partitioning, OLAP and Data Mining options 
 
首先 OraDbHelper.cs 
 代码如下:

using System; 
using System.Data; 
using System.Configuration; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using System.Data.SqlClient; 
using System.Data.OracleClient; 
namespace xjy.DAL 
{ 
/// <summary> 
/// OraDbHelper 对ORACLE 数据库操作的通用类 
/// 作者;薛佳岳 
/// 日期:2009-12-18 
/// </summary> 
public class OraDbHelper 
{ 
private string connectionString; 
/// <summary> 
/// 设置数据库字符串的连接 
/// </summary> 
public string ConnectionString 
{ 
set { connectionString = value; } 
} 
public OraDbHelper(string connectionString) 
{ 
this.connectionString = connectionString; 
} 
#region ExecuteDataTable 
/// <summary> 
/// 执行一个查询，并返回结果集 
/// </summary> 
/// <param name="commandText">要执行的查询SQL文本命令</param> 
/// <returns>返回查询结果集</returns> 
public DataTable ExecuteDataTable(string commandText) 
{ 
return ExecuteDataTable(commandText, CommandType.Text, null); 
} 
/// <summary> 
/// 执行一个查询,并返回查询结果 
/// </summary> 
/// <param name="commandText">要执行的SQL语句</param> 
/// <param name="commandType">要执行的查询语句的类型，如存储过程或者SQL文本命令</param> 
/// <returns>返回查询结果集</returns> 
public DataTable ExecuteDataTable(string commandText, CommandType commandType) 
{ 
return ExecuteDataTable(commandText, commandType, null); 
} 
/// <summary> 
/// 执行一个查询,并返回查询结果 
/// </summary> 
/// <param name="commandText">要执行的SQL语句</param> 
/// <param name="commandType">要执行的查询语句的类型，如存储过程或者SQL文本命令</param> 
/// <param name="parameters">PL-SQL 语句或存储过程的参数数组</param> 
/// <returns></returns> 
public DataTable ExecuteDataTable(string commandText, CommandType commandType, params OracleParameter[] parameters) 
{ 
DataTable data = new DataTable();//实例化DataTable，用于装载查询结果集 
using (OracleConnection connection = new OracleConnection(connectionString)) 
{ 
using (OracleCommand command = new OracleCommand(commandText, connection)) 
{ 
command.CommandType = commandType;//设置command的CommandType为指定的CommandType 
//如果同时传入了参数，则添加这些参数 
if (parameters != null) 
{ 
foreach (OracleParameter parameter in parameters) 
{ 
command.Parameters.Add(parameter); 
} 
} 
//通过包含查询SQL的SqlCommand实例来实例化SqlDataAdapter 
OracleDataAdapter adapter = new OracleDataAdapter(command); 
adapter.Fill(data);//填充DataTable 
} 
} 
return data; 
} 
#endregion ExecuteDataTable 
#region ExecuteReader 
/// <summary> 
/// 将 CommandText 发送到 Connection 并生成一个 OracleDataReader。 
/// </summary> 
/// <param name="commandText">要执行的查询SQL文本命令</param> 
/// <returns></returns> 
public OracleDataReader ExecuteReader(string commandText) 
{ 
return ExecuteReader(commandText, CommandType.Text, null); 
} 
/// <summary> 
/// 将 CommandText 发送到 Connection 并生成一个 OracleDataReader。 
/// </summary> 
/// <param name="commandText">要执行的SQL语句</param> 
/// <param name="commandType">要执行的查询语句的类型，如存储过程或者SQL文本命令</param> 
/// <returns></returns> 
public OracleDataReader ExecuteReader(string commandText, CommandType commandType) 
{ 
return ExecuteReader(commandText, commandType, null); 
} 
/// <summary> 
/// 将 CommandText 发送到 Connection 并生成一个 OracleDataReader。 
/// </summary> 
/// <param name="commandText">要执行的SQL语句</param> 
/// <param name="commandType">要执行的查询语句的类型，如存储过程或者SQL文本命令</param> 
/// <param name="parameters">Transact-SQL 语句或存储过程的参数数组</param> 
/// <returns></returns> 
public OracleDataReader ExecuteReader(string commandText, CommandType commandType, OracleCommand[] parameters) 
{ 
OracleConnection connection = new OracleConnection(connectionString); 
OracleCommand command = new OracleCommand(commandText, connection); 
//如果同时传入了参数，则添加这些参数 
if (parameters != null) 
{ 
foreach (OracleCommand parameter in parameters) 
{ 
command.Parameters.Add(parameter); 
} 
} 
connection.Open(); 
//CommandBehavior.CloseConnection参数指示关闭Reader对象时关闭与其关联的Connection对象 
return command.ExecuteReader(CommandBehavior.CloseConnection); 
} 
#endregion ExecuteReader 
#region ExecuteScalar 
/// <summary> 
/// 从数据库中检索单个值（例如一个聚合值）。 
/// </summary> 
/// <param name="commandText">要执行的查询PL-SQL文本命令</param> 
/// <returns></returns> 
public Object ExecuteScalar(string commandText) 
{ 
return ExecuteScalar(commandText, CommandType.Text, null); 
} 
/// <summary> 
/// 从数据库中检索单个值（例如一个聚合值）。 
/// </summary> 
/// <param name="commandText">要执行的SQL语句</param> 
/// <param name="commandType">要执行的查询语句的类型，如存储过程或者PL-SQL文本命令</param> 
/// <returns></returns> 
public Object ExecuteScalar(string commandText, CommandType commandType) 
{ 
return ExecuteScalar(commandText, commandType, null); 
} 
/// <summary> 
/// 从数据库中检索单个值（例如一个聚合值）。 
/// </summary> 
/// <param name="commandText">要执行的SQL语句</param> 
/// <param name="commandType">要执行的查询语句的类型，如存储过程或者SQL文本命令</param> 
/// <param name="parameters">PL-SQL 语句或存储过程的参数数组</param> 
/// <returns></returns> 
public Object ExecuteScalar(string commandText, CommandType commandType, OracleParameter[] parameters) 
{ 
object result = null; 
using (OracleConnection connection = new OracleConnection(connectionString)) 
{ 
using (OracleCommand command = new OracleCommand(commandText, connection)) 
{ 
command.CommandType = commandType;//设置command的CommandType为指定的CommandType 
//如果同时传入了参数，则添加这些参数 
if (parameters != null) 
{ 
foreach (OracleParameter parameter in parameters) 
{ 
command.Parameters.Add(parameter); 
} 
} 
connection.Open();//打开数据库连接 
result = command.ExecuteScalar(); 
} 
} 
return result;//返回查询结果的第一行第一列，忽略其它行和列 
} 
#endregion ExecuteScalar 
#region ExecuteNonQuery 
/// <summary> 
/// 对数据库执行增删改操作 
/// </summary> 
/// <param name="commandText">要执行的查询pl-sql文本命令</param> 
/// <returns></returns> 
public int ExecuteNonQuery(string commandText) 
{ 
return ExecuteNonQuery(commandText, CommandType.Text, null); 
} 
/// <summary> 
/// 对数据库执行增删改操作 
/// </summary> 
/// <param name="commandText">要执行的pl-sql语句</param> 
/// <param name="commandType">要执行的查询语句的类型，如存储过程或者pl-sql文本命令</param> 
/// <returns></returns> 
public int ExecuteNonQuery(string commandText, CommandType commandType) 
{ 
return ExecuteNonQuery(commandText, commandType, null); 
} 
/// <summary> 
/// 对数据库执行增删改操作 
/// </summary> 
/// <param name="commandText">要执行的pl-sql语句</param> 
/// <param name="commandType">要执行的查询语句的类型，如存储过程或者pl-sql文本命令</param> 
/// <param name="parameters">pl-sql 语句或存储过程的参数数组</param> 
/// <returns>返回执行操作受影响的行数</returns> 
public int ExecuteNonQuery(string commandText, CommandType commandType, OracleParameter[] parameters) 
{ 
int count = 0; 
using (OracleConnection connection = new OracleConnection(connectionString)) 
{ 
using (OracleCommand command = new OracleCommand(commandText, connection)) 
{ 
command.CommandType = commandType;//设置command的CommandType为指定的CommandType 
//如果同时传入了参数，则添加这些参数 
if (parameters != null) 
{ 
foreach (OracleParameter parameter in parameters) 
{ 
command.Parameters.Add(parameter); 
} 
} 
connection.Open();//打开数据库连接 
count = command.ExecuteNonQuery(); 
} 
} 
return count;//返回执行增删改操作之后，数据库中受影响的行数 
} 
#endregion ExecuteNonQuery 
} 
} 
 
一测试datatable 
前台代码 
 代码如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
<title>无标题页</title> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div> 
<asp:GridView ID="GridView1" runat="server"> 
</asp:GridView> 
</div> 
</form> 
</body> 
</html> 
 
后台代码 
 代码如下:

using System; 
using System.Data; 
using System.Configuration; 
using System.Collections; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using xjy.DAL; 
using System.Data.SqlClient; 
public partial class _Default : System.Web.UI.Page 
{ 
protected void Page_Load(object sender, EventArgs e) 
{ 
ConnectionStringSettings setting = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString1"]; 
string myStr = setting.ConnectionString; 
OraDbHelper myora = new OraDbHelper(myStr); 
DataTable t1 = new DataTable(); 
t1=myora.ExecuteDataTable("select art_no,descr from article where art_no<100"); 
GridView1.DataSource=t1; 
GridView1.DataBind(); 
} 
} 
 
结果如图


二 测试 SqlDataReader 
前台代码不变 
后台代码如下： 
 代码如下:

using System; 
using System.Data; 
using System.Configuration; 
using System.Collections; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using xjy.DAL; 
using System.Data.SqlClient; 
using System.Data.OracleClient; 
public partial class _Default : System.Web.UI.Page 
{ 
protected void Page_Load(object sender, EventArgs e) 
{ 
ConnectionStringSettings setting = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString1"]; 
string myStr = setting.ConnectionString; 
OraDbHelper myora = new OraDbHelper(myStr); 
OracleDataReader myDr = myora.ExecuteReader("select art_no,descr from article where art_no<100"); 
while (myDr.Read()) 
{ 
Response.Write("|" + myDr[0] + "|" + myDr[1]+" 
"); 
Response.Write("____________________________________"); 
} 
myDr.Close(); 
myDr.Dispose(); 
} 
} 
 
结果如图 


三测试ExecuteScalar 
前台代码 
 代码如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
<title>无标题页</title> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div> 
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> 
</div> 
</form> 
</body> 
</html> 
 
后台代码 
 代码如下:

using System; 
using System.Data; 
using System.Configuration; 
using System.Collections; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using xjy.DAL; 
using System.Data.SqlClient; 
using System.Data.OracleClient; 
public partial class _Default : System.Web.UI.Page 
{ 
protected void Page_Load(object sender, EventArgs e) 
{ 
ConnectionStringSettings setting = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString1"]; 
string myStr = setting.ConnectionString; 
OraDbHelper myora = new OraDbHelper(myStr); 
string shuliang; 
shuliang = myora.ExecuteScalar("select count(art_no) from article where art_no<100").ToString(); 
Label1.Text = shuliang; 
} 
} 
 
结果如图：


四测试ExecuteNonQuery
前台代码：
 代码如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
<title>无标题页</title> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> 
<asp:GridView ID="GridView1" runat="server"> 
</asp:GridView> 
<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label> 
<asp:GridView ID="GridView2" runat="server"> 
</asp:GridView> 
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="恢复值" /> 
</div> 
</form> 
</body> 
</html> 
 
后台代码 
 代码如下:

using System; 
using System.Data; 
using System.Configuration; 
using System.Collections; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using xjy.DAL; 
using System.Data.SqlClient; 
using System.Data.OracleClient; 
public partial class _Default : System.Web.UI.Page 
{ 
protected void Page_Load(object sender, EventArgs e) 
{ 
ConnectionStringSettings setting = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString1"]; 
string myStr = setting.ConnectionString; 
OraDbHelper myora = new OraDbHelper(myStr); 
DataTable t1 = new DataTable(); 
Label1.Text = "更新前的值"; 
t1 = myora.ExecuteDataTable("select art_no,descr from article where art_no=8"); 
GridView1.DataSource = t1; 
GridView1.DataBind(); 
if (myora.ExecuteNonQuery("update article set descr='更新描述测试值' where art_no=8")>0) 
{ 
Label2.Text = "更新后的值"; 
t1 = myora.ExecuteDataTable("select art_no,descr from article where art_no=8"); 
GridView2.DataSource = t1; 
GridView2.DataBind(); 
} 
} 
protected void Button1_Click(object sender, EventArgs e) 
{ 
ConnectionStringSettings setting = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString1"]; 
string myStr = setting.ConnectionString; 
OraDbHelper myora = new OraDbHelper(myStr); 
DataTable t1 = new DataTable(); 
if (myora.ExecuteNonQuery("update article set descr='可怜可怜60ML/瓶' where art_no=8") > 0) 
{ 
Label2.Text = "更新后的值"; 
t1 = myora.ExecuteDataTable("select art_no,descr from article where art_no=8"); 
GridView2.DataSource = t1; 
GridView2.DataBind(); 
} 
} 
} 
 
结果：