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library GetData;
uses
SysUtils,
Windows,
Classes;
type
TBusinessData = packed record
FYear : Word;
FMonth : Word;
FDay : Word;
FFrameId : array[0..19] of Char;
FSevice : array[0..9] of Char;
end;
PBusinessData = ^TBusinessData;
TBlah = array[0..0] of TBusinessData;
PBlah = ^TBlah;
{$R *.res}
function GetReportData(nStart : TSystemTime;nEnd : TSystemTime; var pData : PBlah ) : Integer; export; stdcall;
var i : Integer;
FData : array of TBusinessData;
begin
SetLength(FData,5);
GetMem(pData, SizeOf(pData^) * 5) ;
for i := Low(FData) to High(FData) do
begin
with FData[i] do
begin
FYear := 2009 + i ;
FMonth := 8 + i;
FDay := 3 + I;
lstrcpy(FSevice,PChar('FSevice'));
lstrcpy(FFrameId,PChar('FFrameId' + IntToStr(I)));
end;
end;
CopyMemory(pData,@FData[0],SizeOf(pData^) * 5);
Result := 5;
end;
exports GetReportData;
begin
end.
//delphi中的调用方法:
数据结构与DLL中定义一样,装载DLL代码就不写了,
type
TFunc_GetReportData = function(nStart : TSystemTime;nEnd : TSystemTime; var pData : PBlah ) : Integer; stdcall;
var
Func_GetReportData : TFunc_GetReportData;
procedure TForm1.btn1Click(Sender: TObject);
var nStart, nEnd : TSystemTime;
pData : PBlah;
aCount : Integer;
i : Integer;
begin
pData := nil;
aCount := Func_GetReportData(nStart,nEnd,pData);
for i := 0 to aCount - 1 do
begin
ShowMessage(TBlah(pData^)[i].FFrameId);
end;
end;
HINSTANCE dllTest;
typedef struct TBusinessData
{
WORD FYear;
WORD FMonth;
WORD FDay;
char FFrameId[20];
char FSevic[10];
}_TBusinessData;
typedef int(_stdcall *GetData)(SYSTEMTIME nStart,SYSTEMTIME nEnd,TBusinessData** pData);
void CTetDlg::OnOK()
{
dllTest=LoadLibrary("GetData.dll");
GetData pGetData;
SYSTEMTIME s,e;
memset(&s,0,sizeof(s));
memset(&e,0,sizeof(e));
s.wYear = 2009;s.wMonth = 8; s.wDay = 3;
e.wYear = 2009;e.wMonth = 9; e.wDay = 3;
pGetData = (GetData)GetProcAddress (dllTest,"GetReportData");
TBusinessData* aData;
int iRecordCount;
CString str;
iRecordCount = pGetData(s,e,&aData);
TBusinessData* pBData = (TBusinessData*)(*&aData);
for(int i = 0; i < iRecordCount ; i ++)
str.Format("Äê%d,ÔÂ%d,ÈÕ%d,±àºÅ%s,·þÎñÀàÐÍ%s",pBData[i].FYear,pBData[i].FMonth,pBData[i].FDay,pBData[i].FFrameId,pBData[i].FSevic);
//不知道打印字符串的函数是啥 -_-....
FreeLibrary(dllTest);