Oracle在.NET里面的DBHelper、OracleDBHelper

using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
using ADODB;
using System.Data.OracleClient;
//return new OracleConnection(ConfigurationManager.ConnectionStrings["OracleConnectionString"].ConnectionString);
namespace EIPWebService.DAL
{
public class DBHelperOracle
{
private static OracleConnection cnn = null;
/// <summary>
/// 连接数据库
/// </summary>
public static OracleConnection Cnn
{
get
{
if (cnn == null)
{
cnn = new OracleConnection(@"Data Source=数据库名;User Id=用户名;Password=密码;");

//string cnnstr = ConfigurationManager.ConnectionStrings["cnnstr"].ToString();
//cnn = new OracleConnection(cnnstr);
cnn.Open();

}
else if (cnn.State == ConnectionState.Closed)
{
cnn.Open();
}
else if (cnn.State == ConnectionState.Broken)
{
cnn.Close();
cnn.Open();
}
return cnn;
}
}
/// <summary>
/// int 增删改功能的Oracle语句。实现增删改功能，返回受影响行数。
/// </summary>
/// <param name="Oracle"></param>
/// <returns></returns>
public static int ExecuteCommand(string Oracle)
{
OracleCommand cmm = new OracleCommand(Oracle, Cnn);
return cmm.ExecuteNonQuery();
}

/// <summary>
/// int 增删改功能的Oracle语句。实现增删改功能，返回受影响行数。
/// [where条件时绑定数据，防止注入式攻击]
/// </summary>
/// <param name="Oracle"></param>
/// <returns></returns>
public static int ExecuteCommand(string Oracle, OracleParameter[] sp)
{
OracleCommand cmm = new OracleCommand(Oracle, Cnn);
cmm.Parameters.AddRange(sp);
return cmm.ExecuteNonQuery();
}

/// <summary>
/// string 查询返回单行单列的Oracle语句。（ 例：select count(*) from 表名或 select name from 表名 ）。
/// </summary>
/// <param name="Oracle"></param>
/// <returns></returns>
public static string ExecuteScalar(string Oracle)
{
OracleCommand cmm = new OracleCommand(Oracle, Cnn);
return cmm.ExecuteScalar().ToString();
}
/// <summary>
/// string 查询返回单行单列的Oracle语句。（ 例：select count(*) from 表名或 select name from 表名 ）。
///  [where条件时绑定数据，防止注入式攻击]
/// </summary>
/// <param name="Oracle"></param>
/// <returns></returns>
public static string ExecuteScalar(string Oracle, OracleParameter[] sp)
{
OracleCommand cmm = new OracleCommand(Oracle, Cnn);
cmm.Parameters.AddRange(sp);
return cmm.ExecuteScalar().ToString();
}
/// <summary>
/// OracleDataReader 查询返回符合条件的记录 每次返回一行
/// </summary>
/// <param name="Oracle"></param>
/// <returns></returns>
public static OracleDataReader ExecuteDataReader(string Oracle)
{
OracleCommand cmm = new OracleCommand(Oracle, Cnn);
return cmm.ExecuteReader();
}
/// <summary>
/// OracleDataReader 查询返回符合条件的记录 每次返回一行.
///  [where条件时绑定数据，防止注入式攻击]
/// </summary>
/// <param name="Oracle"></param>
/// <returns></returns>
public static OracleDataReader ExecuteDataReader(string Oracle, OracleParameter[] sp)
{
OracleCommand cmm = new OracleCommand(Oracle, Cnn);
cmm.Parameters.AddRange(sp);
return cmm.ExecuteReader();
}
/// <summary>
/// DataTable 查询返回符合条件的记录表
/// </summary>
/// <param name="Oracle"></param>
/// <returns></returns>
public static DataTable ExcuteDataTable(string Oracle)
{
OracleCommand cmm = new OracleCommand(Oracle, Cnn);
OracleDataAdapter da = new OracleDataAdapter(cmm);
DataSet ds = new DataSet();
da.Fill(ds);
return ds.Tables[0];
}

/// <summary>
/// DataTable 查询返回符合条件的记录表
///  [where条件时绑定数据，防止注入式攻击]
/// </summary>
/// <param name="Oracle"></param>
/// <returns></returns>
public static DataTable ExcuteDataTable(string Oracle, OracleParameter[] sp)
{
OracleCommand cmm = new OracleCommand(Oracle, Cnn);
cmm.Parameters.AddRange(sp);
OracleDataAdapter da = new OracleDataAdapter(cmm);
DataSet ds = new DataSet();
da.Fill(ds);
return ds.Tables[0];
}

/// <summary>
/// DataTable 查询返回DataTable 带有分页参数，startRecord 开始记录数，maxRecords 最大记录数 适用于分页控件
/// startRecord ：(AspNetPager1.CurrnetPageIndex - 1 )*AspNetPager1.Pagesize
///  maxRecords：AspNetPager1.pagesize
/// </summary>
/// <param name="Oracle"></param>
/// <param name="startRecord"></param>
/// <param name="maxRecords"></param>
/// <returns></returns>
public static DataTable DataTablePage(string Oracle, int startRecord, int maxRecords)
{
OracleCommand cmm = new OracleCommand(Oracle, Cnn);
OracleDataAdapter sdp = new OracleDataAdapter(cmm);
DataTable dt = new DataTable();
sdp.Fill(startRecord, maxRecords, dt);
return dt;
}

/// <summary>
/// DataTable 查询返回【存储过程的Oracle语句】
///
/// </summary>
/// <param name="Oracle"></param>
/// <returns></returns>
public static DataTable ExcuteDataTableByProcedure(string procedure, OracleParameter[] sp)
{
OracleCommand cmm = new OracleCommand(procedure, Cnn);
cmm.CommandType = CommandType.StoredProcedure;
cmm.Parameters.AddRange(sp);
OracleDataAdapter da = new OracleDataAdapter(cmm);
DataSet ds = new DataSet();
da.Fill(ds);
return ds.Tables[0];
}
}
}