c++ builder 6.0 使用TADOQuery ，TADOCommand,TADOConnection

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使用这些原装的组件，访问数据库，操作简单，使用方便，超级好用！

一、查询数据

TADOQuery* pQuery = new TADOQuery(this);
        pQuery->ConnectionString ="Provider=SQLOLEDB.1;Password=sa;Persist Security Info=True;User ID=sa;Initial Catalog=test;Data Source=127.0.0.1" ;
        pQuery->CursorType =ctStatic;
        pQuery->LockType = ltOptimistic  ;
        pQuery->SQL->Text = "select * From table where   id = '1'" ;

        pQuery->Open() ;
         Edit2->Text = pQuery->FieldByName("deptname")->AsString ;
         Edit1->Text = pQuery->Fields->FieldByNumber(3)->AsString;
         Edit3->Text = IntToStr(pQuery->RecordCount)  +"行" ;
         pQuery->Close() ;

二、执行SQL命令

//执行命令
    int RecordsAffected ;
    OleVariant Parameters = 1  ;
    TADOCommand* pCmd = new TADOCommand(this) ;
    pCmd->Connection = ADOConnection1 ;
    pCmd->CommandText = "update table1 set name = 'test2' where id = '1' " ;
    ADOConnection1->BeginTrans() ;
    pCmd->Execute(RecordsAffected,Parameters)       ;
    ADOConnection1->CommitTrans() ;

    Edit3->Text = "影响行数:" + IntToStr(RecordsAffected) ;