ADO访问远程数据库

source.Format("Driver={SQL Server};Server=%s;Uid=%s;Pwd=%S;Database=%s",
Server,Uid,Pwd,Database); pSConn.CreateInstance(__uuidof(Connection));

First Connection string format:
MS SQL Server OLE DB connection using an IP addressProvider=SQLOLEDB; Data Source=xx.xx.xx.xx,1433; Network Library=DBMSSOCN; Initial Catalog=dbname;User ID=sa;Password=pass;Second format:
To connect to SQL Server running on a remote computer (via an IP address)oConn.Open "Driver={SQL Server};" & _
           "Server=xxx.xxx.xxx.xxx;" & _
           "Address=xxx.xxx.xxx.xxx,1433;" & _
           "Network=DBMSSOCN;" & _
           "Database=myDatabaseName;" & _
           "Uid=myUsername;" & _
           "Pwd=myPassword;"
Where:
- xxx.xxx.xxx.xxx is an IP address
- 1433 is the default port number for SQL Server.
- "Network=DBMSSOCN" tells ODBC to use TCP/IP rather than Named

大致步骤应该为：
1、COM库的初始化:通常在你的初始化中加入  AfxOleInit();
2、用#import指令引入ADO类型库：在stdafx.h中加入
import "c:\program files\common files\system\ado\msado15.dll" no_namespace rename("EOF","adoEOF")
3、创建Connection对象并连接数据库
  _ConnectionPtr m_pConnection;
  m_pConnection.CreateInstance("ADODB.Connection");//创建Connection对象
m_pConnection->Open();///连接数据库，具体连接数据库不同，Open括号中的语句不同
4、执行SQL命令并取得结果记录集
为了取得结果记录集，我们定义一个指向Recordset对象的指针:_RecordsetPtr m_pRecordset;
并为其创建Recordset对象的实例: m_pRecordset.CreateInstance("ADODB.Recordset");这样你就可以利用 m_pRecordset来读取或写入记录了

又一个送分的!!!
怎么总不看别人已经结了的贴子？？？？？
借用一下jiangsheng的贴子。
1建立一个数据源
2建立RDO对象
3通过连接字符串访问。
出处：www.csdn.net连接数据库查询手册（不仅仅适用于asp）（ghj1976 转贴）
出处：http://www.active.com.cn
正文：
下面将简单介绍一下几种ADO连接方式：ODBC DSN,ODBC DSN-Less,
OLE DB Provider,和"MS Remote" Provider.
1。ODBC DSN连接
I.DSN
    oConn.Open "DSN=AdvWorks;" & _
        "UID=Admin;" & _
        "PWD=;"
注意：从MDAC2.1开始就不能够在使用这样的方式了，就是只把DSN文件名放在ConnectString中
      你必须同时使用DSN，UID，PWD标志。例如下面的方式在MDAC 2.1中将会出错：
    oConn.Open "AdvWorks"II.File DSN
    oConn.Open "FILEDSN=\somepath\mydb.dsn;" & _
        "UID=Admin;" & _
        "PWD=;"
III.ODBC DSN-Less Connections
a)ODBC Text Driver
    oConn.Open _
        "Driver={Microsoft Text Driver (*.txt; *.csv)};" & _
        "Dbq=\somepath\;" & _
        "Extensions=asc,csv,tab,txt;" & _
        "Persist Security Info=False"
注意：需要在SQL语句中指定使用到的文件名。例如：
    oRs.Open "Select * From customer.csv", _
        oConn, adOpenStatic, adLockReadOnly, adCmdText
b)ODBC Driver for Access
    i)普通安全模式：
        oConn.Open _
            "Driver={Microsoft Access Driver (*.mdb)};" & _
            "Dbq=\somepath\mydb.mdb;" & _
            "Uid=Admin;" & _
            "Pwd=;"
    ii)如果使用了System database:
        oConn.Open _
            "Driver={Microsoft Access Driver (*.mdb)};" & _
            "Dbq=\somepath\mydb.mdb;" & _
            "SystemDB=\somepath\mydb.mdw;", _
            "admin", ""
c)ODBC Driver for SQL Server
    i)普通安全模式
        oConn.Open "Driver={SQL Server};" & _
            "Server=carl2;" & _
            "Database=pubs;" & _
            "Uid=sa;" & _
            "Pwd=;"
    ii)使用信任安全模式：
        oConn.Open "Driver={SQL Server};" & _
            "Server=carl2;" & _
            "Database=pubs;" & _
            "Uid=;" & _
            "Pwd=;"
    注意：要使用空白的Uid和Pwd
d)ODBC Driver for Oracle
    i)使用现有的Oracle ODBC Driver from Microsoft:
        oConn.Open _
            "Driver={Microsoft ODBC for Oracle};" & _
            "Server=OracleServer.world;" & _
            "Uid=demo;" & _
            "Pwd=demo;"
    ii)使用老版本的Oracle ODBC Driver from Microsoft:
        oConn.Open _
            "Driver={Microsoft ODBC Driver for Oracle};" & _
            "ConnectString=OracleServer.world;" & _
            "Uid=demo;" & _
            "Pwd=demo;"
IIII)使用微软的OLE DB Data Link Connections方式Data Link File (UDL)
a)使用绝对路径
    oConn.Open "File Name=\somepath\pubs.udl;"
b)使用相对路径
    oConn.Open "File Name=pubs.udl;"
V)OLE DB Provider Connections方式
a)OLE DB Provider for ODBC Databases
    i)Access (Jet):
        oConn.Open _
            "Provider=MSDASQL;" & _
            "Driver={Microsoft Access Driver (*.mdb)};" & _
            "Dbq=\somepath\mydb.mdb;" & _
            "Uid=Admin;" & _
            "Pwd=;"
    ii)SQL Server:
        oConn.Open _
            "Provider=MSDASQL;" & _
            "Driver={SQL Server};" & _
            "Server=carl2;" & _
            "Database=pubs;" & _
            "Uid=sa;" & _
            "Pwd=;"
b)OLE DB Provider for Microsoft Jet  (Access)
    i)普通安全模式：
        oConn.Open _
            "Provider=Microsoft.Jet.OLEDB.4.0;" & _
            "Data Source=\somepath\mydb.mdb;" & _
            "User Id=admin;" & _
            "Password=;"
    ii)如果使用了System database:
        oConn.Open _
            "Provider=Microsoft.Jet.OLEDB.4.0;" & _
            "Data Source=\somepath\mydb.mdb;" & _
            "Jet OLEDB:System Database=system.mdw;", _
            "admin", ""
    注意：当使用OLE DB Provider4.0版本是，需要把MDB和MDW文件转换成4.0的数据库格式
    iii)如果MDB需要一个数据库密码的话：
        oConn.Open _
            "Provider=Microsoft.Jet.OLEDB.4.0;" & _
            "Data Source=\somepath\mydb.mdb;" & _
            "Jet OLEDB:Database Password=MyDbPassword;", _
            "admin", ""
c)OLE DB Provider for Excel Spreadsheet:
        oConn.Open _
            "Provider=Microsoft.Jet.OLEDB.4.0;" & _
            "Data Source=\somepath\expenses.xls;" & _
            "Extended Properties=""Excel 8.0;HDR=Yes;"";"
    注意： "HDR=Yes"表示在第一行中是行标题，在provider中将不把第一行包括入recordset中
d)OLE DB Provider for SQL Server
    i)普通安全模式：
        oConn.Open "Provider=sqloledb;" & _
            "Network Library=DBMSSOCN;" & _
            "Data Source=carl2;" & _
            "Initial Catalog=pubs;" & _
            "User Id=sa;" & _
            "Password=;"
    ii)使用信任安全模式：
        oConn.Open "Provider=sqloledb;" & _
            Network Library=DBMSSOCN;" & _
            "Data Source=carl2;" & _
            "Initial Catalog=pubs;" & _
            "Trusted_Connection=yes;"
    注意："Network Library=DBMSSOCN"声明OLE DB使用TCP/IP替代Named Pipes.
e)OLE DB Provider for Oracle
    oConn.Open "Provider=msdaora;" & _
        "Data Source=OracleServer.world;" & _
        "User Id=sa;" & _
        "Password=;"
(VI)Remote OLE DB Provider Connections方式（就是我一直在研究的RDS方式哦，呵呵。）：
a)MS Remote - Access (Jet)
    i)ODBC DSN:
        oConn.Open "Remote Server=http://carl2;" & _
            "Remote Provider=MSDASQL;" & _
            "DSN=AdvWorks;" & _
            "Uid=admin" & _
            "Pwd=;"
    ii)OLE DB Provider:
        oConn.Open "Provider=MS Remote;" & _
            "Remote Server=http://carl2;" & _
            "Remote Provider=Microsoft.Jet.OLEDB.4.0;" & _
            "Data Source=\somepath\mydb.mdb;", _
            "admin", ""
    iii)OLE DB Provider自定义事务对象
        oConn.Open "Provider=MS Remote;" & _
            "Remote Server=http://carl2;" & _
            "Handler=MSDFMAP.Handler;" & _
            "Data Source=MyAdvworksOLEDBConnectTag;"
b)MS Remote - SQL Server
    i)ODBC DSN:
        oConn.Open "Remote Server=http://carl2;" & _
            "Remote Provider=MSDASQL;" & _
            "Network Library=DBMSSOCN;" & _
            "DSN=Pubs;" & _
            "Uid=sa" & _
            "Pwd=;"
    ii)OLE DB Provider
        oConn.Open "Provider=MS Remote;" & _
            "Remote Server=http://carl2;" & _
            "Remote Provider=SQLOLEDB;" & _
            "Network Library=DBMSSOCN;" & _
            "Data Source=carl2;" & _
            "Initial Catalog=pubs;" & _
            "User ID=sa;" & _
            "Password=;"
拿分来!!!!!!!!
拿分来!!!!!!!!
拿分来!!!!!!!!

调试易

ADO访问远程数据库

解决方案 »