OracleHelper--> Oracle数据库连接类及测试
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1. OracleHelper.cs
using System;
using System.Data;
using Oracle.DataAccess.Client;
namespace Utils
{
///
/// Desciption: Oracle数据库访问类 (注：针对 odp.net ).
/// Author : yenange
/// Date : 2013-09-21
///
public static class OracleHelper
{
#region [ 连接对象 ]
///
/// 连接对象 字段
///
private static OracleConnection conn = null;
///
/// 连接串 字段
///
//private static string connstr = @"Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=ORCL)));User Id=leaf;Password=leaf;";
private static string connstr = @"Data Source=localhost/ORCL;Persist Security Info=True;User ID=leaf;Password=leaf;";
///
/// 取得连接串
///
public static string GetConnectionString
{
get
{
return connstr;
}
}
///
/// 取得连接对象, 没有打开
///
public static OracleConnection GetOracleConnection
{
get
{
return new OracleConnection(GetConnectionString);
}
}
///
/// 取得连接对象， 并打开
///
public static OracleConnection GetOracleConnectionAndOpen
{
get
{
OracleConnection conn = GetOracleConnection;
conn.Open();
return conn;
}
}
///
/// 彻底关闭并释放 OracleConnection 对象，再置为null.
///
/// OracleConnection
public static void CloseOracleConnection(OracleConnection conn)
{
if (conn == null)
return;
conn.Close();
conn.Dispose();
conn = null;
}
#endregion
#region [ ExecuteNonQuery ]
///
/// 普通SQL语句执行增删改
///
/// SQL语句
/// 可变参数
/// 受影响行数
public static int ExecuteNonQuery(string cmdText, params OracleParameter[] commandParameters)
{
return ExecuteNonQuery(cmdText, CommandType.Text, commandParameters);
}
///
/// 存储过程执行增删改
///
/// 存储过程
/// 可变参数
/// 受影响行数
public static int ExecuteNonQueryByProc(string cmdText, params OracleParameter[] commandParameters)
{
return ExecuteNonQuery(cmdText, CommandType.StoredProcedure, commandParameters);
}
///
/// 执行增删改
///
/// 命令字符串
/// 命令类型
/// 可变参数
/// 受影响行数
public static int ExecuteNonQuery(string cmdText, CommandType cmdType, params OracleParameter[] commandParameters)
{
int result = 0;
OracleConnection conn = null;
try
{
conn = GetOracleConnectionAndOpen;
OracleCommand command = new OracleCommand();
PrepareCommand(command, conn, cmdType, cmdText, commandParameters);
result = command.ExecuteNonQuery();
}
catch (Exception ex)
{
result = -1;
}
finally
{
if (conn != null)
CloseOracleConnection(conn);
}
return result;
}
#endregion
#region [ ExecuteReader ]
///
/// SQL语句得到 OracleDataReader 对象
///
/// 命令字符串
/// 可变参数
/// OracleDataReader 对象
public static OracleDataReader ExecuteReader(string cmdText, params OracleParameter[] commandParameters)
{
return ExecuteReader(cmdText, CommandType.Text, commandParameters);
}
///
/// 存储过程得到 OracleDataReader 对象
///
/// 命令字符串
/// 可变参数
/// OracleDataReader 对象
public static OracleDataReader ExecuteReaderByProc(string cmdText, params OracleParameter[] commandParameters)
{
return ExecuteReader(cmdText, CommandType.StoredProcedure, commandParameters);
}
///
/// 得到 OracleDataReader 对象
///
/// 命令字符串
/// 命令类型
/// 可变参数
/// OracleDataReader 对象
public static OracleDataReader ExecuteReader(string cmdText, CommandType cmdType, params OracleParameter[] commandParameters)
{
OracleDataReader result = null;
OracleConnection conn = null;
try
{
conn = GetOracleConnectionAndOpen;
OracleCommand command = new OracleCommand();
PrepareCommand(command, conn, cmdType, cmdText, commandParameters);
result = command.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
result = null;
}
finally
{
if (conn != null)
CloseOracleConnection(conn);
}
return result;
}
#endregion
#region [ ExecuteScalar ]
///
/// 执行SQL语句, 返回Object
///
/// 命令字符串
/// 可变参数
/// Object
public static Object ExecuteScalar(string cmdText, params OracleParameter[] commandParameters)
{
return ExecuteScalar(cmdText, CommandType.Text, commandParameters);
}
///
/// 执行存储过程, 返回Object
///
/// 命令字符串
/// 可变参数
/// Object
public static Object ExecuteScalarByProc(string cmdText, params OracleParameter[] commandParameters)
{
return ExecuteScalar(cmdText, CommandType.StoredProcedure, commandParameters);
}
///
/// 返回Object
///
/// 命令字符串
/// 命令类型
/// 可变参数
/// Object
public static Object ExecuteScalar(string cmdText, CommandType cmdType, params OracleParameter[] commandParameters)
{
Object result = null;
OracleConnection conn = null;
try
{
conn = GetOracleConnectionAndOpen;
OracleCommand command = new OracleCommand();
PrepareCommand(command, conn, cmdType, cmdText, commandParameters);
result = command.ExecuteScalar();
}
catch (Exception ex)
{
result = null;
}
finally
{
if (conn != null)
CloseOracleConnection(conn);
}
return result;
}
#endregion
#region [ ExecuteDataSet ]
///
/// 执行SQL语句, 返回DataSet
///
/// 命令字符串
/// 可变参数
/// DataSet
public static DataSet ExecuteDataSet(string cmdText, params OracleParameter[] commandParameters)
{
return ExecuteDataSet(cmdText, CommandType.Text, commandParameters);
}
///
/// 执行存储过程, 返回DataSet
///
/// 命令字符串
/// 可变参数
/// DataSet
public static DataSet ExecuteDataSetByProc(string cmdText, params OracleParameter[] commandParameters)
{
return ExecuteDataSet(cmdText, CommandType.StoredProcedure, commandParameters);
}
///
/// 返回DataSet
///
/// 命令字符串
/// 命令类型
/// 可变参数
/// DataSet
public static DataSet ExecuteDataSet(string cmdText, CommandType cmdType, params OracleParameter[] commandParameters)
{
DataSet result = null;
OracleConnection conn = null;
try
{
conn = GetOracleConnectionAndOpen;
OracleCommand command = new OracleCommand();
PrepareCommand(command, conn, cmdType, cmdText, commandParameters);
OracleDataAdapter adapter = new OracleDataAdapter();
adapter.SelectCommand = command;
result = new DataSet();
adapter.Fill(result);
}
catch (Exception ex)
{
result = null;
}
finally
{
if (conn != null)
CloseOracleConnection(conn);
}
return result;
}
#endregion
#region [ ExecuteDataTable ]
///
/// 执行SQL语句, 返回DataTable
///
/// 命令字符串
/// 可变参数
/// DataTable
public static DataTable ExecuteDataTable(string cmdText, params OracleParameter[] commandParameters)
{
return ExecuteDataTable(cmdText, CommandType.Text , commandParameters);
}
///
/// 执行存储过程, 返回DataTable
///
/// 命令字符串
/// 可变参数
/// DataTable
public static DataTable ExecuteDataTableByProc(string cmdText, params OracleParameter[] commandParameters)
{
return ExecuteDataTable(cmdText, CommandType.StoredProcedure, commandParameters);
}
///
/// 返回DataTable
///
/// 命令字符串
/// 命令类型
/// 可变参数
/// DataTable
public static DataTable ExecuteDataTable(string cmdText, CommandType cmdType, params OracleParameter[] commandParameters)
{
DataTable dtResult = null;
DataSet ds = ExecuteDataSet(cmdText, cmdType, commandParameters);
if (ds != null && ds.Tables.Count > 0)
{
dtResult = ds.Tables[0];
}
return dtResult;
}
#endregion
#region [ PrepareCommand ]
///
/// Command对象执行前预处理
///
///
///
///
///
///
///
private static void PrepareCommand(OracleCommand command, OracleConnection connection, CommandType cmdType, string cmdText, OracleParameter[] commandParameters)
{
try
{
if (connection.State != ConnectionState.Open) connection.Open();
command.Connection = connection;
command.CommandText = cmdText;
command.CommandType = cmdType;
//if (trans != null) command.Transaction = trans;
if (commandParameters != null)
{
foreach (OracleParameter parm in commandParameters)
command.Parameters.Add(parm);
}
}
catch
{
}
}
#endregion
}//end of class
}//end of namespace2. 测试类
using System;
using System.Collections.Generic;
using System.Text;
using Oracle.DataAccess.Client;
using System.Data;
using Utils;
namespace OracleForNet
{
class Program
{
static void Main(string[] args)
{
try
{
using (OracleConnection conn = Utils.OracleHelper.GetOracleConnectionAndOpen)
{
if (conn.State == ConnectionState.Open)
{
Console.WriteLine("打开连接成功！");
}
}
}
catch (Exception ex)
{
Console.WriteLine("出现异常, 异常信息: " + ex.Message);
}
Console.Read();
}
}//end of class
}//end of namespace