[英]Extracting files from zip file in c++ using COM
我一直在尋找一種將文件壓縮在一起以通過Web服務發送並在收到文件后將其提取的方法。 我在http://www.codeproject.com/Articles/280650/Zip-Unzip-using-Windows-Shell中找到了顯示的代碼。 將文件放入zip文件夾的代碼可以正常工作,它是:
BSTR source = L"C:\\Users\\...\\Desktop\\test1.txt\0\0";
BSTR dest = L"C:\\Users\\...\\Desktop\\test.zip\\\0\0";
HRESULT hResult;
IShellDispatch *pISD;
Folder *pToFolder = NULL;
VARIANT vDir, vFile, vOpt;
CoInitialize(NULL);
hResult = CoCreateInstance
(CLSID_Shell, NULL, CLSCTX_INPROC_SERVER, IID_IShellDispatch, (void **)&pISD);
if (SUCCEEDED(hResult))
{
VariantInit(&vDir);
vDir.vt = VT_BSTR;
vDir.bstrVal = dest;
// Destination is our zip file
hResult = pISD->NameSpace(vDir, &pToFolder);
if (SUCCEEDED(hResult))
{
// Now copy source file(s) to the zip
VariantInit(&vFile);
vFile.vt = VT_BSTR;
vFile.bstrVal = source;
VariantInit(&vOpt);
vOpt.vt = VT_I4;
vOpt.lVal = FOF_NO_UI;
// Copying and compressing the source files to our zip
hResult = pToFolder->CopyHere(vFile, vOpt);
Sleep(1000);
pToFolder->Release();
}
pISD->Release();
}
CoUninitialize();
從zip文件中提取文件的代碼不是這樣的:
BSTR source = L"C:\\Users\\...\\Desktop\\test1.zip\\\0\0";
BSTR dest = L"C:\\Users\\...\\Desktop\\unzipto\\\0\0";
HRESULT hResult;
IShellDispatch *pISD;
Folder *pToFolder = NULL;
VARIANT vDir, vFile, vOpt;
CoInitialize(NULL);
hResult = CoCreateInstance
(CLSID_Shell, NULL, CLSCTX_INPROC_SERVER, IID_IShellDispatch, (void **)&pISD);
if (SUCCEEDED(hResult))
{
VariantInit(&vDir);
vDir.vt = VT_BSTR;
vDir.bstrVal = dest;
// Destination is our zip file
hResult = pISD->NameSpace(vDir, &pToFolder);
if (SUCCEEDED(hResult))
{
Folder *pFromFolder = NULL;
VariantInit(&vFile);
vFile.vt = VT_BSTR;
vFile.bstrVal = source;
pISD->NameSpace(vFile, &pFromFolder);
FolderItems *fi = NULL;
pFromFolder->Items(&fi); //----Fails Here!-----
VariantInit(&vOpt);
vOpt.vt = VT_I4;
vOpt.lVal = FOF_NO_UI; // Do not display a progress dialog box
// Creating a new Variant with pointer to FolderItems to be copied
VARIANT newV;
VariantInit(&newV);
newV.vt = VT_DISPATCH;
newV.pdispVal = fi;
hResult = pToFolder->CopyHere(newV, vOpt);
Sleep(1000);
pFromFolder->Release();
pToFolder->Release();
}
pISD->Release();
}
CoUninitialize();
程序在pFromFolder->Items(&fi);
處失敗pFromFolder->Items(&fi);
。
在運行程序之前,存在目標文件夾“ unzipto”。 另外,嘗試在“文件夾”變量中查找任何內容也非常棘手,因為google會帶回除我正在尋找的內容以外的所有內容。
有沒有人可以闡明這一點,甚至可以告訴我為什么會發生這種情況?
好了,在幾乎瘋狂地嘗試找出原因之后,我意識到我為源文件使用了錯誤的文件名。 我使用的是test1.zip而不是test.zip,每次閱讀都錯過了! 就那么簡單.......
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