在一個項目中，可能用到2種數據，比如說ORACLE ，MS_SQLSERVER 同時要用到，MS-SQL的數據通用類在很多的教程中都有現成的例子和代碼，但是ORACLE比較少見，但是本次項目中正好用到，貼出來和大家一起共享。
這裡用OraDbHelper.cs做常見的四種數據操作
一 ExecuteDataTable 返回到內存數據表
二 SqlDataReader 直接讀數據
三 ExecuteScalar 獲得一條數據
四 ExecuteNonQuery 對數據庫執行增刪改操作
環境：客戶端WIN XP 安裝的是ORACLE 8.17客戶端
數據庫服務器是：Red Hat Enterprise Linux AS 安裝的是Oracle Database 10g
復制代碼 代碼如下:
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.
連接到:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
首先 OraDbHelper.cs
復制代碼 代碼如下:
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 對ORACLE 數據庫操作的通用類
/// 作者;薛佳岳
/// 日期:2009-12-18
/// </summary>
public class OraDbHelper
{
private string connectionString;
/// <summary>
/// 設置數據庫字符串的連接
/// </summary>
public string ConnectionString
{
set { connectionString = value; }
}
public OraDbHelper(string connectionString)
{
this.connectionString = connectionString;
}
#region ExecuteDataTable
/// <summary>
/// 執行一個查詢，並返回結果集
/// </summary>
/// <param name="commandText">要執行的查詢SQL文本命令</param>
/// <returns>返回查詢結果集</returns>
public DataTable ExecuteDataTable(string commandText)
{
return ExecuteDataTable(commandText, CommandType.Text, null);
}
/// <summary>
/// 執行一個查詢,並返回查詢結果
/// </summary>
/// <param name="commandText">要執行的SQL語句</param>
/// <param name="commandType">要執行的查詢語句的類型，如存儲過程或者SQL文本命令</param>
/// <returns>返回查詢結果集</returns>
public DataTable ExecuteDataTable(string commandText, CommandType commandType)
{
return ExecuteDataTable(commandText, commandType, null);
}
/// <summary>
/// 執行一個查詢,並返回查詢結果
/// </summary>
/// <param name="commandText">要執行的SQL語句</param>
/// <param name="commandType">要執行的查詢語句的類型，如存儲過程或者SQL文本命令</param>
/// <param name="parameters">PL-SQL 語句或存儲過程的參數數組</param>
/// <returns></returns>
public DataTable ExecuteDataTable(string commandText, CommandType commandType, params OracleParameter[] parameters)
{
DataTable data = new DataTable();//實例化DataTable，用於裝載查詢結果集
using (OracleConnection connection = new OracleConnection(connectionString))
{
using (OracleCommand command = new OracleCommand(commandText, connection))
{
command.CommandType = commandType;//設置command的CommandType為指定的CommandType
//如果同時傳入了參數，則添加這些參數
if (parameters != null)
{
foreach (OracleParameter parameter in parameters)
{
command.Parameters.Add(parameter);
}
}
//通過包含查詢SQL的SqlCommand實例來實例化SqlDataAdapter
OracleDataAdapter adapter = new OracleDataAdapter(command);
adapter.Fill(data);//填充DataTable
}
}
return data;
}
#endregion ExecuteDataTable
#region ExecuteReader
/// <summary>
/// 將 CommandText 發送到 Connection 並生成一個 OracleDataReader。
/// </summary>
/// <param name="commandText">要執行的查詢SQL文本命令</param>
/// <returns></returns>
public OracleDataReader ExecuteReader(string commandText)
{
return ExecuteReader(commandText, CommandType.Text, null);
}
/// <summary>
/// 將 CommandText 發送到 Connection 並生成一個 OracleDataReader。
/// </summary>
/// <param name="commandText">要執行的SQL語句</param>
/// <param name="commandType">要執行的查詢語句的類型，如存儲過程或者SQL文本命令</param>
/// <returns></returns>
public OracleDataReader ExecuteReader(string commandText, CommandType commandType)
{
return ExecuteReader(commandText, commandType, null);
}
/// <summary>
/// 將 CommandText 發送到 Connection 並生成一個 OracleDataReader。
/// </summary>
/// <param name="commandText">要執行的SQL語句</param>
/// <param name="commandType">要執行的查詢語句的類型，如存儲過程或者SQL文本命令</param>
/// <param name="parameters">Transact-SQL 語句或存儲過程的參數數組</param>
/// <returns></returns>
public OracleDataReader ExecuteReader(string commandText, CommandType commandType, OracleCommand[] parameters)
{
OracleConnection connection = new OracleConnection(connectionString);
OracleCommand command = new OracleCommand(commandText, connection);
//如果同時傳入了參數，則添加這些參數
if (parameters != null)
{
foreach (OracleCommand parameter in parameters)
{
command.Parameters.Add(parameter);
}
}
connection.Open();
//CommandBehavior.CloseConnection參數指示關閉Reader對象時關閉與其關聯的Connection對象
return command.ExecuteReader(CommandBehavior.CloseConnection);
}
#endregion ExecuteReader
#region ExecuteScalar
/// <summary>
/// 從數據庫中檢索單個值（例如一個聚合值）。
/// </summary>
/// <param name="commandText">要執行的查詢PL-SQL文本命令</param>
/// <returns></returns>
public Object ExecuteScalar(string commandText)
{
return ExecuteScalar(commandText, CommandType.Text, null);
}
/// <summary>
/// 從數據庫中檢索單個值（例如一個聚合值）。
/// </summary>
/// <param name="commandText">要執行的SQL語句</param>
/// <param name="commandType">要執行的查詢語句的類型，如存儲過程或者PL-SQL文本命令</param>
/// <returns></returns>
public Object ExecuteScalar(string commandText, CommandType commandType)
{
return ExecuteScalar(commandText, commandType, null);
}
/// <summary>
/// 從數據庫中檢索單個值（例如一個聚合值）。
/// </summary>
/// <param name="commandText">要執行的SQL語句</param>
/// <param name="commandType">要執行的查詢語句的類型，如存儲過程或者SQL文本命令</param>
/// <param name="parameters">PL-SQL 語句或存儲過程的參數數組</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;//設置command的CommandType為指定的CommandType
//如果同時傳入了參數，則添加這些參數
if (parameters != null)
{
foreach (OracleParameter parameter in parameters)
{
command.Parameters.Add(parameter);
}
}
connection.Open();//打開數據庫連接
result = command.ExecuteScalar();
}
}
return result;//返回查詢結果的第一行第一列，忽略其它行和列
}
#endregion ExecuteScalar
#region ExecuteNonQuery
/// <summary>
/// 對數據庫執行增刪改操作
/// </summary>
/// <param name="commandText">要執行的查詢pl-sql文本命令</param>
/// <returns></returns>
public int ExecuteNonQuery(string commandText)
{
return ExecuteNonQuery(commandText, CommandType.Text, null);
}
/// <summary>
/// 對數據庫執行增刪改操作
/// </summary>
/// <param name="commandText">要執行的pl-sql語句</param>
/// <param name="commandType">要執行的查詢語句的類型，如存儲過程或者pl-sql文本命令</param>
/// <returns></returns>
public int ExecuteNonQuery(string commandText, CommandType commandType)
{
return ExecuteNonQuery(commandText, commandType, null);
}
/// <summary>
/// 對數據庫執行增刪改操作
/// </summary>
/// <param name="commandText">要執行的pl-sql語句</param>
/// <param name="commandType">要執行的查詢語句的類型，如存儲過程或者pl-sql文本命令</param>
/// <param name="parameters">pl-sql 語句或存儲過程的參數數組</param>
/// <returns>返回執行操作受影響的行數</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;//設置command的CommandType為指定的CommandType
//如果同時傳入了參數，則添加這些參數
if (parameters != null)
{
foreach (OracleParameter parameter in parameters)
{
command.Parameters.Add(parameter);
}
}
connection.Open();//打開數據庫連接
count = command.ExecuteNonQuery();
}
}
return count;//返回執行增刪改操作之後，數據庫中受影響的行數
}
#endregion ExecuteNonQuery
}
}
一測試datatable
前台代碼
復制代碼 代碼如下:
<%@ 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>無標題頁</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
</div>
</form>
</body>
</html>
後台代碼
復制代碼 代碼如下:
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();
}
}
結果如圖
二 測試 SqlDataReader
前台代碼不變
後台代碼如下：
復制代碼 代碼如下:
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();
}
}
結果如圖
三測試ExecuteScalar
前台代碼
復制代碼 代碼如下:
<%@ 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>無標題頁</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</div>
</form>
</body>
</html>
後台代碼
復制代碼 代碼如下:
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;
}
}
結果如圖：
四測試ExecuteNonQuery
前台代碼：
復制代碼 代碼如下:
<%@ 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>無標題頁</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="恢復值" />
</div>
</form>
</body>
</html>
後台代碼
復制代碼 代碼如下:
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='更新描述測試值' where art_no=8")>0)
{
Label2.Text = "更新後的值";
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='可憐可憐60ML/瓶' where art_no=8") > 0)
{
Label2.Text = "更新後的值";
t1 = myora.ExecuteDataTable("select art_no,descr from article where art_no=8");
GridView2.DataSource = t1;
GridView2.DataBind();
}
}
}
結果：
