unit1.cpp

C++Builder高级应用开发指南随书源码

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

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::DropFile(TWMDropFiles &Msg)
{
   AnsiString FileName;   //文件名
   AnsiString Extension;  //文件扩展名
   FileName.SetLength(256);
   DragQueryFile((HDROP)Msg.Drop,0,FileName.c_str(),FileName.Length());
   Extension=ExtractFileExt(FileName);
   Extension=Extension.UpperCase();
   //限制字符串长度为4，以便于随后同".TXT"的比较
   Extension.SetLength(4);
   if(Extension==".TXT")
   {
      Caption=FileName;
      RichEdit1->Lines->LoadFromFile(FileName);
   }
   DragFinish((HDROP)Msg.Drop);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormCreate(TObject *Sender)
{
   DragAcceptFiles(Handle,true);     
}
//---------------------------------------------------------------------------