将DBF文件导入Sqlserver数据库_MySQL
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; }
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(); } }
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。
以上就是将DBF文件导入Sqlserver数据库_MySQL的内容,更多相关内容请关注PHP中文网(www.php.cn)!

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