using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Data.OleDb;
using System.Configuration;
namespace Ant.Data
{
///
/// Copyright (C) 2004-2008 LiTianPing
///数据访问基础类(基于OleDb)
///可以用户可以修改满足自己项目的需要。
///
public abstract class DbHelperOleDb : BaseDataAccess
{
//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 = PubConstant.ConnectionString;
public static string connectionString = ConfigurationManager.AppSettings["DBConnectionString"].ToString();
public DbHelperOleDb()
{
}
///
///执行SQL语句，返回影响的记录数
///
///SQL语句
///影响的记录数
public static int ExecuteSql(string SQLString)
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
using (OleDbCommand cmd = new OleDbCommand(SQLString, connection))
{
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.OleDb.OleDbException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}
///
///执行多条SQL语句，实现数据库事务。
///
///多条SQL语句
public static void ExecuteSqlTran(ArrayList SQLStringList)
{
using (OleDbConnection conn = new OleDbConnection(connectionString))
{
conn.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = conn;
OleDbTransaction 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 (System.Data.OleDb.OleDbException E)
{
tx.Rollback();
throw new Exception(E.Message);
}
}
}
///
///执行带一个存储过程参数的的SQL语句。
///
///SQL语句
///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
///影响的记录数
public static int ExecuteSql(string SQLString, string content)
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
OleDbCommand cmd = new OleDbCommand(SQLString, connection);
System.Data.OleDb.OleDbParameter myParameter = new System.Data.OleDb.OleDbParameter("@content", OleDbType.VarChar);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.OleDb.OleDbException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
///
///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)
///
///SQL语句
///图像字节,数据库的字段类型为image的情况
///影响的记录数
public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
OleDbCommand cmd = new OleDbCommand(strSQL, connection);
System.Data.OleDb.OleDbParameter myParameter = new System.Data.OleDb.OleDbParameter("@fs", OleDbType.Binary);
myParameter.Value = fs;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (System.Data.OleDb.OleDbException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
///
///执行一条计算查询结果语句，返回查询结果（object）。
///
///计算查询结果语句
///查询结果（object）
public static object GetSingle(string SQLString)
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
using (OleDbCommand cmd = new OleDbCommand(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 (System.Data.OleDb.OleDbException e)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
///
///执行查询语句，返回OleDbDataReader
///
///查询语句
///OleDbDataReader
public static OleDbDataReader ExecuteReader(string strSQL)
{
OleDbConnection connection = new OleDbConnection(connectionString);
OleDbCommand cmd = new OleDbCommand(strSQL, connection);
try
{
connection.Open();
OleDbDataReader myReader = cmd.ExecuteReader();
return myReader;
}
catch (System.Data.OleDb.OleDbException e)
{
throw new Exception(e.Message);
}
}
///
///执行查询语句，返回DataSet
///
///查询语句
///DataSet
public static DataSet Query(string SQLString)
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
OleDbDataAdapter command = new OleDbDataAdapter(SQLString, connection);
command.Fill(ds, "ds");
}
catch (System.Data.OleDb.OleDbException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
///
///执行SQL语句，返回影响的记录数
///
///SQL语句
///影响的记录数
public static int ExecuteSql(string SQLString, params OleDbParameter[] cmdParms)
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
using (OleDbCommand cmd = new OleDbCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (System.Data.OleDb.OleDbException E)
{
throw new Exception(E.Message);
}
}
}
}
///
///执行多条SQL语句，实现数据库事务。
///
///SQL语句的哈希表（key为sql语句，value是该语句的OleDbParameter[]）
public static void ExecuteSqlTran(Hashtable SQLStringList)
{
using (OleDbConnection conn = new OleDbConnection(connectionString))
{
conn.Open();
using (OleDbTransaction trans = conn.BeginTransaction())
{
OleDbCommand cmd = new OleDbCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
OleDbParameter[] cmdParms = (OleDbParameter[])myDE.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
trans.Commit();
}
}
catch
{
trans.Rollback();
throw;
}
}
}
}
///
///执行一条计算查询结果语句，返回查询结果（object）。
///
///计算查询结果语句
///查询结果（object）
public static object GetSingle(string SQLString, params OleDbParameter[] cmdParms)
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
using (OleDbCommand cmd = new OleDbCommand())
{
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 (System.Data.OleDb.OleDbException e)
{
throw new Exception(e.Message);
}
}
}
}
///
///执行查询语句，返回OleDbDataReader
///
///查询语句
///OleDbDataReader
public static OleDbDataReader ExecuteReader(string SQLString, params OleDbParameter[] cmdParms)
{
OleDbConnection connection = new OleDbConnection(connectionString);
OleDbCommand cmd = new OleDbCommand();
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
OleDbDataReader myReader = cmd.ExecuteReader();
cmd.Parameters.Clear();
return myReader;
}
catch (System.Data.OleDb.OleDbException e)
{
throw new Exception(e.Message);
}
}
///
///执行查询语句，返回DataSet
///
///查询语句
///DataSet
public static DataSet Query(string SQLString, params OleDbParameter[] cmdParms)
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
OleDbCommand cmd = new OleDbCommand();
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (OleDbDataAdapter da = new OleDbDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (System.Data.OleDb.OleDbException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
private static void PrepareCommand(OleDbCommand cmd, OleDbConnection conn, OleDbTransaction trans, string cmdText, OleDbParameter[] 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 (OleDbParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
///
///执行存储过程
///
///存储过程名
///param name="parameters">存储过程参数
///OleDbDataReader
public static OleDbDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
{
OleDbConnection connection = new OleDbConnection(connectionString);
OleDbDataReader returnReader;
connection.Open();
OleDbCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader();
return returnReader;
}
///
///执行存储过程
///
///存储过程名
///存储过程参数
///DataSet结果中的表名
///DataSet
public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
OleDbDataAdapter sqlDA = new OleDbDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.Fill(dataSet, tableName);
connection.Close();
return dataSet;
}
}
///
///构建OleDbCommand 对象(用来返回一个结果集，而不是一个整数值)
///
///数据库连接
///存储过程名
///存储过程参数
///OleDbCommand
private static OleDbCommand BuildQueryCommand(OleDbConnection connection, string storedProcName, IDataParameter[] parameters)
{
OleDbCommand command = new OleDbCommand(storedProcName, connection);
command.CommandType = CommandType.StoredProcedure;
foreach (OleDbParameter parameter in parameters)
{
command.Parameters.Add(parameter);
}
return command;
}
///
///执行存储过程，返回影响的行数
///
///存储过程名
///存储过程参数
///影响的行数
///
public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
int result;
connection.Open();
OleDbCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}
///
///创建OleDbCommand 对象实例(用来返回一个整数值)
///
///存储过程名
///存储过程参数
///OleDbCommand 对象实例
private static OleDbCommand BuildIntCommand(OleDbConnection connection, string storedProcName, IDataParameter[] parameters)
{
OleDbCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new OleDbParameter("ReturnValue",
OleDbType.Integer, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
return command;
}
}
}