using System;
|
using System.Collections;
|
using System.Collections.Specialized;
|
using System.Data;
|
using System.Configuration;
|
using Oracle.ManagedDataAccess;
|
using Oracle.ManagedDataAccess.Types;
|
using Oracle.ManagedDataAccess.Client;
|
|
namespace DataexchangeServer.Helper
|
{
|
/// <summary>
|
/// 数据访问基础类(基于Oracle) Copyright (C) Maticsoft
|
/// 可以用户可以修改满足自己项目的需要。
|
/// </summary>
|
public abstract class DbHelperOra
|
{
|
//数据库连接字符串(web.config来配置)，可以动态更改connectionString支持多数据库.
|
public static string connectionString = "Data Source = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.13)(PORT = 1521))(CONNECT_DATA = (SERVICE_NAME = ORCL))); Persist Security Info=True;User ID = jfprd; Password=jf_prd";
|
public DbHelperOra()
|
{
|
}
|
|
#region 公用方法
|
|
public static int GetMaxID(string FieldName, string TableName)
|
{
|
string strsql = "select max(" + FieldName + ")+1 from " + TableName;
|
object obj = GetSingle(strsql);
|
if (obj == null)
|
{
|
return 1;
|
}
|
else
|
{
|
return int.Parse(obj.ToString());
|
}
|
}
|
public static bool Exists(string strSql)
|
{
|
object obj = GetSingle(strSql);
|
int cmdresult;
|
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
|
{
|
cmdresult = 0;
|
}
|
else
|
{
|
cmdresult = int.Parse(obj.ToString());
|
}
|
if (cmdresult == 0)
|
{
|
return false;
|
}
|
else
|
{
|
return true;
|
}
|
}
|
|
public static bool Exists(string strSql, params OracleParameter[] cmdParms)
|
{
|
object obj = GetSingle(strSql, cmdParms);
|
int cmdresult;
|
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
|
{
|
cmdresult = 0;
|
}
|
else
|
{
|
cmdresult = int.Parse(obj.ToString());
|
}
|
if (cmdresult == 0)
|
{
|
return false;
|
}
|
else
|
{
|
return true;
|
}
|
}
|
|
|
#endregion
|
|
|
#region 执行简单SQL语句
|
|
/// <summary>
|
/// 执行SQL语句，返回影响的记录数
|
/// </summary>
|
/// <param name="SQLString">SQL语句</param>
|
/// <returns>影响的记录数</returns>
|
public static int ExecuteSql(string SQLString)
|
{
|
using (OracleConnection connection = new OracleConnection(connectionString))
|
{
|
using (OracleCommand cmd = new OracleCommand(SQLString, connection))
|
{
|
try
|
{
|
connection.Open();
|
int rows = cmd.ExecuteNonQuery();
|
return rows;
|
}
|
catch (OracleException E)
|
{
|
connection.Close();
|
throw new Exception(E.Message);
|
}
|
}
|
}
|
}
|
|
/// <summary>
|
/// 执行多条SQL语句，实现数据库事务。
|
/// </summary>
|
/// <param name="SQLStringList">多条SQL语句</param>
|
public static void ExecuteSqlTran(ArrayList SQLStringList)
|
{
|
using (OracleConnection conn = new OracleConnection(connectionString))
|
{
|
conn.Open();
|
OracleCommand cmd = new OracleCommand();
|
cmd.Connection = conn;
|
OracleTransaction tx = conn.BeginTransaction();
|
cmd.Transaction = tx;
|
try
|
{
|
for (int n = 0; n < SQLStringList.Count; n++)
|
{
|
string strsql = SQLStringList[n].ToString();
|
if (strsql.Trim().Length > 1)
|
{
|
cmd.CommandText = strsql;
|
cmd.ExecuteNonQuery();
|
}
|
}
|
tx.Commit();
|
}
|
catch (OracleException E)
|
{
|
tx.Rollback();
|
throw new Exception(E.Message);
|
}
|
}
|
}
|
/// <summary>
|
/// 执行带一个存储过程参数的的SQL语句。
|
/// </summary>
|
/// <param name="SQLString">SQL语句</param>
|
/// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
|
/// <returns>影响的记录数</returns>
|
public static int ExecuteSql(string SQLString, string content)
|
{
|
using (OracleConnection connection = new OracleConnection(connectionString))
|
{
|
OracleCommand cmd = new OracleCommand(SQLString, connection);
|
OracleParameter myParameter = new OracleParameter("@content", OracleDbType.Varchar2);
|
myParameter.Value = content;
|
cmd.Parameters.Add(myParameter);
|
try
|
{
|
connection.Open();
|
int rows = cmd.ExecuteNonQuery();
|
return rows;
|
}
|
catch (OracleException E)
|
{
|
throw new Exception(E.Message);
|
}
|
finally
|
{
|
cmd.Dispose();
|
connection.Close();
|
}
|
}
|
}
|
/// <summary>
|
/// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
|
/// </summary>
|
/// <param name="strSQL">SQL语句</param>
|
/// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
|
/// <returns>影响的记录数</returns>
|
public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
|
{
|
using (OracleConnection connection = new OracleConnection(connectionString))
|
{
|
OracleCommand cmd = new OracleCommand(strSQL, connection);
|
OracleParameter myParameter = new OracleParameter("@fs", OracleDbType.LongRaw);
|
myParameter.Value = fs;
|
cmd.Parameters.Add(myParameter);
|
try
|
{
|
connection.Open();
|
int rows = cmd.ExecuteNonQuery();
|
return rows;
|
}
|
catch (OracleException E)
|
{
|
throw new Exception(E.Message);
|
}
|
finally
|
{
|
cmd.Dispose();
|
connection.Close();
|
}
|
}
|
}
|
|
/// <summary>
|
/// 执行一条计算查询结果语句，返回查询结果（object）。
|
/// </summary>
|
/// <param name="SQLString">计算查询结果语句</param>
|
/// <returns>查询结果（object）</returns>
|
public static object GetSingle(string SQLString)
|
{
|
using (OracleConnection connection = new OracleConnection(connectionString))
|
{
|
using (OracleCommand cmd = new OracleCommand(SQLString, connection))
|
{
|
try
|
{
|
connection.Open();
|
object obj = cmd.ExecuteScalar();
|
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
|
{
|
return null;
|
}
|
else
|
{
|
return obj;
|
}
|
}
|
catch (OracleException e)
|
{
|
connection.Close();
|
throw new Exception(e.Message);
|
}
|
}
|
}
|
}
|
/// <summary>
|
/// 执行查询语句，返回OracleDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
|
/// </summary>
|
/// <param name="strSQL">查询语句</param>
|
/// <returns>OracleDataReader</returns>
|
public static OracleDataReader ExecuteReader(string strSQL)
|
{
|
OracleConnection connection = new OracleConnection(connectionString);
|
OracleCommand cmd = new OracleCommand(strSQL, connection);
|
try
|
{
|
connection.Open();
|
OracleDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
|
return myReader;
|
}
|
catch (OracleException e)
|
{
|
throw new Exception(e.Message);
|
}
|
|
}
|
/// <summary>
|
/// 执行查询语句，返回DataSet
|
/// </summary>
|
/// <param name="SQLString">查询语句</param>
|
/// <returns>DataSet</returns>
|
public static DataSet Query(string SQLString)
|
{
|
using (OracleConnection connection = new OracleConnection(connectionString))
|
{
|
DataSet ds = new DataSet();
|
try
|
{
|
connection.Open();
|
OracleDataAdapter command = new OracleDataAdapter(SQLString, connection);
|
command.Fill(ds, "ds");
|
}
|
catch (OracleException ex)
|
{
|
throw new Exception(ex.Message);
|
}
|
return ds;
|
}
|
}
|
|
|
#endregion
|
|
#region 执行带参数的SQL语句
|
|
/// <summary>
|
/// 执行SQL语句，返回影响的记录数
|
/// </summary>
|
/// <param name="SQLString">SQL语句</param>
|
/// <returns>影响的记录数</returns>
|
public static int ExecuteSql(string SQLString, params OracleParameter[] cmdParms)
|
{
|
using (OracleConnection connection = new OracleConnection(connectionString))
|
{
|
using (OracleCommand cmd = new OracleCommand())
|
{
|
try
|
{
|
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
|
int rows = cmd.ExecuteNonQuery();
|
cmd.Parameters.Clear();
|
return rows;
|
}
|
catch (OracleException E)
|
{
|
throw new Exception(E.Message);
|
}
|
}
|
}
|
}
|
|
|
/// <summary>
|
/// 执行多条SQL语句，实现数据库事务。
|
/// </summary>
|
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的OracleParameter[]）</param>
|
public static void ExecuteSqlTran(Hashtable SQLStringList)
|
{
|
using (OracleConnection conn = new OracleConnection(connectionString))
|
{
|
conn.Open();
|
using (OracleTransaction trans = conn.BeginTransaction())
|
{
|
OracleCommand cmd = new OracleCommand();
|
try
|
{
|
//循环
|
foreach (DictionaryEntry myDE in SQLStringList)
|
{
|
string cmdText = myDE.Key.ToString();
|
OracleParameter[] cmdParms = (OracleParameter[])myDE.Value;
|
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
|
int val = cmd.ExecuteNonQuery();
|
cmd.Parameters.Clear();
|
|
trans.Commit();
|
}
|
}
|
catch
|
{
|
trans.Rollback();
|
throw;
|
}
|
}
|
}
|
}
|
|
|
/// <summary>
|
/// 执行一条计算查询结果语句，返回查询结果（object）。
|
/// </summary>
|
/// <param name="SQLString">计算查询结果语句</param>
|
/// <returns>查询结果（object）</returns>
|
public static object GetSingle(string SQLString, params OracleParameter[] cmdParms)
|
{
|
using (OracleConnection connection = new OracleConnection(connectionString))
|
{
|
using (OracleCommand cmd = new OracleCommand())
|
{
|
try
|
{
|
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
|
object obj = cmd.ExecuteScalar();
|
cmd.Parameters.Clear();
|
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
|
{
|
return null;
|
}
|
else
|
{
|
return obj;
|
}
|
}
|
catch (OracleException e)
|
{
|
throw new Exception(e.Message);
|
}
|
}
|
}
|
}
|
|
/// <summary>
|
/// 执行查询语句，返回OracleDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
|
/// </summary>
|
/// <param name="strSQL">查询语句</param>
|
/// <returns>OracleDataReader</returns>
|
public static OracleDataReader ExecuteReader(string SQLString, params OracleParameter[] cmdParms)
|
{
|
OracleConnection connection = new OracleConnection(connectionString);
|
OracleCommand cmd = new OracleCommand();
|
try
|
{
|
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
|
OracleDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
|
cmd.Parameters.Clear();
|
return myReader;
|
}
|
catch (OracleException e)
|
{
|
throw new Exception(e.Message);
|
}
|
|
}
|
|
/// <summary>
|
/// 执行查询语句，返回DataSet
|
/// </summary>
|
/// <param name="SQLString">查询语句</param>
|
/// <returns>DataSet</returns>
|
public static DataSet Query(string SQLString, params OracleParameter[] cmdParms)
|
{
|
using (OracleConnection connection = new OracleConnection(connectionString))
|
{
|
OracleCommand cmd = new OracleCommand();
|
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
|
using (OracleDataAdapter da = new OracleDataAdapter(cmd))
|
{
|
DataSet ds = new DataSet();
|
try
|
{
|
da.Fill(ds, "ds");
|
cmd.Parameters.Clear();
|
}
|
catch (OracleException ex)
|
{
|
throw new Exception(ex.Message);
|
}
|
return ds;
|
}
|
}
|
}
|
|
|
private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, string cmdText, OracleParameter[] cmdParms)
|
{
|
if (conn.State != ConnectionState.Open)
|
conn.Open();
|
cmd.Connection = conn;
|
cmd.CommandText = cmdText;
|
if (trans != null)
|
cmd.Transaction = trans;
|
cmd.CommandType = CommandType.Text;//cmdType;
|
if (cmdParms != null)
|
{
|
foreach (OracleParameter parm in cmdParms)
|
cmd.Parameters.Add(parm);
|
}
|
}
|
|
#endregion
|
|
#region 存储过程操作
|
|
/// <summary>
|
/// 执行存储过程 返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
|
/// </summary>
|
/// <param name="storedProcName">存储过程名</param>
|
/// <param name="parameters">存储过程参数</param>
|
/// <returns>OracleDataReader</returns>
|
public static OracleDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
|
{
|
OracleConnection connection = new OracleConnection(connectionString);
|
OracleDataReader returnReader;
|
connection.Open();
|
OracleCommand command = BuildQueryCommand(connection, storedProcName, parameters);
|
command.CommandType = CommandType.StoredProcedure;
|
returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
|
return returnReader;
|
}
|
|
|
/// <summary>
|
/// 执行存储过程
|
/// </summary>
|
/// <param name="storedProcName">存储过程名</param>
|
/// <param name="parameters">存储过程参数</param>
|
/// <param name="tableName">DataSet结果中的表名</param>
|
/// <returns>DataSet</returns>
|
public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
|
{
|
using (OracleConnection connection = new OracleConnection(connectionString))
|
{
|
DataSet dataSet = new DataSet();
|
connection.Open();
|
OracleDataAdapter sqlDA = new OracleDataAdapter();
|
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
|
sqlDA.Fill(dataSet, tableName);
|
connection.Close();
|
return dataSet;
|
}
|
}
|
|
|
/// <summary>
|
/// 构建 OracleCommand 对象(用来返回一个结果集，而不是一个整数值)
|
/// </summary>
|
/// <param name="connection">数据库连接</param>
|
/// <param name="storedProcName">存储过程名</param>
|
/// <param name="parameters">存储过程参数</param>
|
/// <returns>OracleCommand</returns>
|
private static OracleCommand BuildQueryCommand(OracleConnection connection, string storedProcName, IDataParameter[] parameters)
|
{
|
OracleCommand command = new OracleCommand(storedProcName, connection);
|
command.CommandType = CommandType.StoredProcedure;
|
foreach (OracleParameter parameter in parameters)
|
{
|
command.Parameters.Add(parameter);
|
}
|
return command;
|
}
|
|
/// <summary>
|
/// 执行存储过程，返回影响的行数
|
/// </summary>
|
/// <param name="storedProcName">存储过程名</param>
|
/// <param name="parameters">存储过程参数</param>
|
/// <param name="rowsAffected">影响的行数</param>
|
/// <returns></returns>
|
public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
|
{
|
using (OracleConnection connection = new OracleConnection(connectionString))
|
{
|
int result;
|
connection.Open();
|
OracleCommand command = BuildIntCommand(connection, storedProcName, parameters);
|
rowsAffected = command.ExecuteNonQuery();
|
result = (int)command.Parameters["ReturnValue"].Value;
|
connection.Close();
|
return result;
|
}
|
}
|
|
/// <summary>
|
/// 创建 OracleCommand 对象实例(用来返回一个整数值)
|
/// </summary>
|
/// <param name="storedProcName">存储过程名</param>
|
/// <param name="parameters">存储过程参数</param>
|
/// <returns>OracleCommand 对象实例</returns>
|
private static OracleCommand BuildIntCommand(OracleConnection connection, string storedProcName, IDataParameter[] parameters)
|
{
|
OracleCommand command = BuildQueryCommand(connection, storedProcName, parameters);
|
command.Parameters.Add(new OracleParameter("ReturnValue",
|
OracleDbType.Int32, 4, ParameterDirection.ReturnValue,
|
false, 0, 0, string.Empty, DataRowVersion.Default, null));
|
return command;
|
}
|
#endregion
|
|
}
|
}
|
