快速业务通道

C++ Builder常用代码片断

作者 佚名技术 来源 程序设计 浏览 发布时间 2012-06-29
_fastcall TfmMainForm::Cancel1Click(TObject *Sender)
{
  int i;
  switch (PageControl1->ActivePage->Tag))
  {
   case 1:
    for (i=0; i < ComponentCount; i++)
    {
     if (dynamic_cast(Components[i]))
      dynamic_cast(Components[i])->Enabled = false;
    }
    Data->tbDetail->Cancel();
    break;
   case 2:
    for (i=0; i < ComponentCount; i++)
    {
     if (dynamic_cast(Components[i]))
      dynamic_cast(Components[i])->Enabled = false;
    }
    Data->tbDetail->Cancel();
    break;
   case 3:
    for (i=0; i < ComponentCount; i++)
    {
     if (dynamic_cast(Components[i]))
      dynamic_cast(Components[i])->Text = "";
    }
   default:
    break;
  }
}

向Query传递参数

// 直接从表向Query传递参数的一种方法
TQuery *Query = new TQuery(this);
Query->DatabaseName = "dbServer";
Query->SQL->Clear();
Query->SQL->Add("DELETE FROM ''Events.DB'' WHERE (TicketNo = " + Data->tbProblem->FieldByName("TicketNo")->AsString + ")" );
Query->ExecSQL();
Query->Close();
delete Query;
日期属性
TMaskEdit *meOpen;
TLabel *lbCount1;
TDateTime Date2;
void __fastcall TfmMainForm::CountOpen(TObject *Sender)
{
  switch(dynamic_cast<TComponent&>(*Sender).Tag)
  {
   case 1:
    count1 = StrToInt(lbCount1->Caption);
    count1 += 1;
    Date2 = Now() + count1;
    meOpen->Text = Date2.DateString();
    lbCount1->Caption = IntToStr(count1);
    break;
  case 2:
   count1 = StrToInt(lbCount1->Caption);
   count1 -= 1;
   Date2 = Now() + count1;
   meOpen->Text = Date2.DateString();
   lbCount1->Caption = IntToStr(count1);
   break;
  }
}

绘制状态条

void __fastcall TForm1::StatusBar1DrawPanel(TStatusBar *StatusBar, TStatusPanel *Panel, const TRect &Rect)
{
  TCanvas& c = *StatusBar->Canvas;
  switch (Panel->Index)
  {
   case 0 :
   {
    StatusBar1->Panels->Items[0]->Text = "Hello C++";
    c.Brush->Style = bsClear;
    TRect temp = Rect;
    temp.Top += 1;
    temp.Left += 1;
    c.Font->Color = clWhite;
    DrawText(c.Handle,Panel->Text.c_str(),-1,(RECT*)&temp,DT_SINGLELINE|DT_CENTER);
    c.Font->Color = clBlack;
    DrawText(c.Handle,Panel->Text.c_str(),-1,(RECT*)&Rect,DT_SINGLELINE|DT_CENTER);
    break;
   }
   case 1:
   {
    c.Brush->Color = clYellow;
    c.FillRect(Rect);
    c.Font->Color = clRed;
    DrawText(c.Handle,"clYellow Color", -1, (RECT*)&Rect, DT_SINGLELINE | DT_CENTER);
    break;
   }
   case 2:
   {
    Graphics::TBitmap* bm = new Graphics::TBitmap;
    bm->Handle = LoadBitmap(NULL, MAKEINTRESOURCE(32760));
    c.Draw(Rect.Left, Rect.Top, bm);
    delete bm;
    break;
   }
  }
}

凌众科技专业提供服务器租用、服务器托管、企业邮局、虚拟主机等服务,公司网站:http://www.lingzhong.cn 为了给广大客户了解更多的技术信息,本技术文章收集来源于网络,凌众科技尊重文章作者的版权,如果有涉及你的版权有必要删除你的文章,请和我们联系。以上信息与文章正文是不可分割的一部分,如果您要转载本文章,请保留以上信息,谢谢!

分享到: 更多

Copyright ©1999-2011 厦门凌众科技有限公司 厦门优通互联科技开发有限公司 All rights reserved

地址(ADD):厦门软件园二期望海路63号701E(东南融通旁) 邮编(ZIP):361008

电话:0592-5908028 传真:0592-5908039 咨询信箱:web@lingzhong.cn 咨询OICQ:173723134

《中华人民共和国增值电信业务经营许可证》闽B2-20100024  ICP备案:闽ICP备05037997号