unit2.cpp

c++ builder,ado控件用法的部分演示

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit2.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm2 *Form2;
//---------------------------------------------------------------------------
__fastcall TForm2::TForm2(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm2::btnExitClick(TObject *Sender)
{
   this->Close();
}
//---------------------------------------------------------------------------

void __fastcall TForm2::btnQueryClick(TObject *Sender)
{
  AnsiString sqlcmdstr="select * from userinfo where id=" ;
  if(this->dbedt4->Text=="")return;
    else sqlcmdstr += this->dbedt4->Text;
    //this->qry1-> =String(sqlcmdstr);
    this->qry1->Active=true;
}
//---------------------------------------------------------------------------