MESProductionWeb/AntORM/Ant.Data/DataAccess/DbHelperOleDb.cs

using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Data.OleDb;
using System.Configuration;

namespace Ant.Data
{

    ///<summary>
    /// 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。
    ///</summary>
    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()
        {


        }


  

        ///<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 (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);


                    }


                }


            }


        }



        ///<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 (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);


                }


            }


        }

        ///<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 (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();
                }


            }


        }

        ///<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 (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();

                }


            }


        }

        ///<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 (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);
                    }


                }



            }


        }

        ///<summary>

        ///执行查询语句，返回OleDbDataReader

        ///</summary>

        ///<param name="strSQL">查询语句</param>

        ///<returns>OleDbDataReader</returns>

        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);


            }


        }

        ///<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 (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;


            }



        }




        ///<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 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);


                    }


                }


            }


        }

        ///<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OleDbParameter[]）</param>

        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;


                    }


                }


            }


        }

        ///<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 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);


                    }



                }


            }


        }

        ///<summary>

        ///执行查询语句，返回OleDbDataReader

        ///</summary>

        ///<param name="strSQL">查询语句</param>

        ///<returns>OleDbDataReader</returns>

        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);


            }


        }

        ///<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 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);


            }


        }


     



        ///<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>

        ///<returns>OleDbDataReader</returns>

        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;


        }

        ///<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 (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;


            }


        }

        ///<summary>

        ///构建OleDbCommand 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>OleDbCommand</returns>

        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;


        }

        ///<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 (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;


            }


        }

        ///<summary>

        ///创建OleDbCommand 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>OleDbCommand 对象实例</returns>

        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;


        }





    
    }

}