UrlDownloadToFile怎样实现下载进度条效果，回调部分怎么写,分不够再加

[KeNan_Net]

UrlDownloadToFile怎样实现下载进度条效果，回调部分怎么写,分不够再加

[lzf8977]

一段能够下载文件的源代码
// 在工程中加入 Urlmon.lib

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

#include <vcl.h>
#include <windows.h>
#include <Urlmon.h>
#pragma hdrstop
#include "Unit1.h"
//---------------------------------------------------------------------------
cImpMonikerCallback objImpCallback;
//---------------------------------------------------------------------------

#pragma argsused
WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
LPUNKNOWN pCaller;
pCaller = NULL;
DWORD dwResv = 0;
objImpCallback.lpfnCB = (IBindStatusCallback *)&objImpCallback;

HRESULT hRet=URLDownloadToFile(pCaller,"http://127.0.0.1:30000/download/icon.zip","d:\\temp\\icon.zip",dwResv,objImpCallback.lpfnCB);

if(hRet==S_OK)
MessageBox(NULL,"成功下载文件","",MB_OK);

return 0;
}
//---------------------------------------------------------------------------

cImpMonikerCallback::cImpMonikerCallback()
{
m_cRef = 1;
m_pbinding = NULL;
};
//---------------------------------------------------------------------------

cImpMonikerCallback::~cImpMonikerCallback()
{
if(m_pbinding)
m_pbinding->Release();
};
//---------------------------------------------------------------------------

STDMETHODIMP cImpMonikerCallback::QueryInterface(REFIID riid,void ** ppv)
{
*ppv = NULL;
if (riid==IID_IUnknown ¦¦ riid==IID_IBindStatusCallback)
{
*ppv = this;
AddRef();
return S_OK;
}
return E_NOINTERFACE;
};
//---------------------------------------------------------------------------

STDMETHODIMP_(ULONG) cImpMonikerCallback::AddRef()
{
return m_cRef++;
}
//---------------------------------------------------------------------------

STDMETHODIMP_(ULONG) cImpMonikerCallback::Release()
{
if(--m_cRef==0)
{
delete this;
return 0;
}
return m_cRef;
}
//---------------------------------------------------------------------------

STDMETHODIMP cImpMonikerCallback::GetBindInfo(DWORD* pgrfBINDF, BINDINFO* pbindinfo)
{
return(NOERROR);
}
//---------------------------------------------------------------------------

STDMETHODIMP cImpMonikerCallback::OnStartBinding(DWORD grfBSCOption, IBinding* pbinding)
{
return(NOERROR);
}
//---------------------------------------------------------------------------

STDMETHODIMP cImpMonikerCallback::GetPriority(LONG* pnPriority)
{
return(NOERROR);
}
//---------------------------------------------------------------------------

STDMETHODIMP cImpMonikerCallback::OnProgress(ULONG ulProgress, ULONG ulProgressMax,ULONG ulStatusCode, LPCWSTR szStatusText)
{
return(NOERROR);
};
//---------------------------------------------------------------------------

STDMETHODIMP cImpMonikerCallback::OnDataAvailable(DWORD grfBSCF, DWORD dwSize, FORMATETC *pfmtetc,STGMEDIUM* pstgmed)
{
return(NOERROR);
}
//---------------------------------------------------------------------------

STDMETHODIMP cImpMonikerCallback::OnObjectAvailable(REFIID riid, IUnknown* punk)
{
return(NOERROR);
}
//---------------------------------------------------------------------------

STDMETHODIMP cImpMonikerCallback::OnLowResource(DWORD dwReserved)
{
return(NOERROR);
}
//---------------------------------------------------------------------------

STDMETHODIMP cImpMonikerCallback::OnStopBinding(HRESULT hrStatus, LPCWSTR szText)
{
return(NOERROR);
}
//---------------------------------------------------------------------------

///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////

class cImpMonikerCallback:public IBindStatusCallback
{
DWORD m_cRef;
IBinding* m_pbinding;
public:
cImpMonikerCallback();
~cImpMonikerCallback();

STDMETHODIMP QueryInterface(REFIID riid,void ** ppv);
STDMETHODIMP_(ULONG) AddRef();// { return m_cRef++; }
STDMETHODIMP_(ULONG) Release();
STDMETHODIMP GetBindInfo(DWORD* pgrfBINDF, BINDINFO* pbindinfo);
STDMETHODIMP OnStartBinding(DWORD grfBSCOption, IBinding* pbinding);
STDMETHODIMP GetPriority(LONG* pnPriority);
STDMETHODIMP OnProgress(ULONG ulProgress, ULONG ulProgressMax,ULONG ulStatusCode, LPCWSTR szStatusText);
STDMETHODIMP OnDataAvailable(DWORD grfBSCF, DWORD dwSize, FORMATETC *pfmtetc,STGMEDIUM* pstgmed);
STDMETHODIMP OnObjectAvailable(REFIID riid, IUnknown* punk);
STDMETHODIMP OnLowResource(DWORD dwReserved);
STDMETHODIMP OnStopBinding(HRESULT hrStatus, LPCWSTR szText);

LPBINDSTATUSCALLBACK lpfnCB;
PSTR sURL;
PSTR sFile;
char cSysDir[MAX_PATH];
DWORD dwPlatform;
};

[goingup]

mark

[vcmute]

wind，看好问题再转贴，人家问的就是objImpCallback部分怎么写

[蒋晟]

override IBindStatusCallback::OnProgress...

[DentistryDoctor]

http://www.codeproject.com/internet/urlfile.asp

[hurryboylqs]

恩，楼上的大哥，我下载不了哪个例子，你能给我传个吗？email:[e-mail]
谢谢

[KeNan_Net]

谢谢DentistryDoctor
http://www.codeproject.com/internet/urlfile.asp
这个例子解决了我的文题,不过我下了一个多小时，试了几十次才下载下来

现转载到http://www.olclock.com/download/urlfile.htm(电信）
或http://cnc.olclock.com/download/urlfile.htm（网通)

[flstx]

http://www.codeproject.com/internet/urlfile.asp




--------------------Configuration: urlfile - Win32 Unicode Release--------------------
Compiling resources...
Compiling...
StdAfx.cpp
Compiling...
urlfile.cpp
D:\Program Files\Microsoft Visual Studio\MyProjects\urlfile\urlfileDlg.h(16) : error C2065: 'BINDSTATUS_ACCEPTRANGES' : undeclared identifier
D:\Program Files\Microsoft Visual Studio\MyProjects\urlfile\urlfileDlg.h(16) : error C2057: expected constant expression
urlfileDlg.cpp
D:\Program Files\Microsoft Visual Studio\MyProjects\urlfile\urlfileDlg.h(16) : error C2065: 'BINDSTATUS_ACCEPTRANGES' : undeclared identifier
D:\Program Files\Microsoft Visual Studio\MyProjects\urlfile\urlfileDlg.h(16) : error C2057: expected constant expression
Generating Code...
Ö´ÐÐ cl.exe ʱ³ö´í.

urlfile.exe - 1 error(s), 0 warning(s)


這是...?