Home Database Mysql Tutorial 将DBF文件导入Sqlserver数据库_MySQL

将DBF文件导入Sqlserver数据库_MySQL

May 27, 2016 pm 07:11 PM

项目中的问题:用户选择N个dbf文件导入sql2005数据库,由于每年dbf表结构都在变化,所以在sql2005中根本就不存在,需要每年根据dbf的结构自动建表。

 

解决方法(摘抄自网络):     

 

--方法一:

 

         select * into 要生成的SQL表名 from OPENROWSET('MICROSOFT.JET.OLEDB.4.0','dBase IV;HDR=NO;IMEX=2;DATABASE=c:/','select * from dbf表名.dbf')

 

--方法二:

 

         select * into 要生成的SQL表名 from OPENROWSET('MICROSOFT.JET.OLEDB.4.0','dBase III;HDR=NO;IMEX=2;DATABASE=c:/','select * from dbf表名.dbf')

 

--方法三:

 

         select * into 要生成的SQL表名 from openrowset('MSDASQL','Driver=Microsoft Visual FoxPro Driver;SourceType=DBF;SourceDB=c:/','select * from dbf表名.DBF')

 

--用前两种方法导入SQL SERVER后,源表再用VFP打开就不提示“不能存取文件”,说明语句执行后就把源表关闭了。不过也有不尽人意的地方,就是用前两种方法导入后,源表中的字符型字段导入后SQL表字段对应变成NVARCHAR了。

 

--第三种方法有一个缺点:把DBF表导入SQL Server中后,马上用VISUAL FOXPRO打开DBF表,会提示“不能存取文件”,即这个表还被SQL打开着呢。可是过了1分钟左右,再打开DBF表就可以了,说明经过一段时间后查询分析器才把这个表关闭。

 

可以直接将dbf文件导入sqlserver数据库,也可以先将dbf文件导入dataset,再将dataset的数据导入数据库。dbf文件导入dataset的具体实现方法如下:

 

需要引入system.data.Odbc包


 public DataSet importDbfToDataSet(string FilePath, string tabname)
        {
            string strConnection = @"Dsn=Visual FoxPro Tables;
            sourcedb=" + FilePath.Substring(0, FilePath.LastIndexOf("//")) + ";
            sourcetype=DBF;exclusive=No;backgroundfetch=Yes;collate=Machine";

            //对于连接串,注意版本问题

            string strSelect = "SELECT * FROM  " + tabname;
            OdbcConnection thisConnection = new OdbcConnection(strConnection);
            thisConnection.Open();
           OdbcDataAdapter thisAdapter = new OdbcDataAdapter(strSelect, thisConnection);
            DataSet thisDataSet = new DataSet();
            try
            {
                thisAdapter.Fill(thisDataSet);
            }
            catch (Exception e)
            {
                throw e;
            }
            finally
            {
                thisConnection.Close();
            }
            return thisDataSet;
        }
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下面的程序通过Timer定时器,设置定时将本地dbf文件直接存入数据库表,该dbf文件会定时被覆盖掉。


 class Connect
    {
        //定义连接字符串,连接对象,命令对象
        private String connectionstr;
        private SqlConnection connection;
        private SqlCommand command;
        private DataSet dataset;      
        public Connect()
        {
            connectionstr = "Server=192.168.88.59;Initial 
            Catalog=Test; User 
            ID=sa;Password=sasa;";
            connection = new SqlConnection(connectionstr);
            dataset = new DataSet();          
            command = connection.CreateCommand();
            connection.Open();
        }
        public void CreateTimer()
        {
            Timer timer = new Timer();
            timer.Enabled = true;
            timer.Interval = 60 * 1000;//设置一分钟
            timer.Elapsed+=new ElapsedEventHandler(timer_Elapsed);
        }
        void timer_Elapsed(object sender, ElapsedEventArgs e)
        {
            Connect c = new Connect();
            int minute = e.SignalTime.Minute;
            int iminute = 5;
            if(minute==iminute)//设置每个小时的第五分钟执行
            c.Insert();
        }
        private void Insert()
        {
            //string filepath = "C;//";
            //将dbf文件导入指定数据库的表
            string creattb = 
            "select * into tablename from OPENROWSET('MSDASQL','driver=Microsoft visual 
            foxpro driver; sourcedb=c://;SourceType=DBF','select * from RSZ1031.dbf')";
            SqlCommand mycommand = new SqlCommand(creattb, connection);
            mycommand.ExecuteNonQuery();
        }
    }
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1.无法初始化链接服务器 "(null)" 的 OLE DB 访问接口 "msdasql" 的数据源对象”;

 

原因是安装sql2005数据库的系统中没有 VFPODBC驱动,到http://msdn.microsoft.com/en-us/vfoxpro/bb190233.aspx下载并安装

 

 2.SQL Server 阻止了对组件 'Ad Hoc Distributed Queries' 的 STATEMENT'OpenRowset/OpenDatasource' 的访问;

 

原因是因为“功能的外围应用配置器”中没有“启用openrowset和opendatasource支持”,只需要打开“功能的外围应用配置器”设置一下就可以。

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