Win 7中的自定义文件属性 [英] Custom File Properties in Win 7

问题描述

在Win Xp等的先前代码中，我设置了一些自定义文件属性，如下面的代码所示.现在，我在Win7中发现这会锁定我的文件，因为pPropSetStg->Release()失败.但是，进一步，在Win 7上没有自定义文件属性吗?或至少它们不能以相同的方式工作.我找不到任何有关为什么更改它或如何解决它的信息.有谁知道(或链接到)正确的Win7方法来执行此操作?




部分答案...为使您的文件类型显示内置的自定义属性，您需要根据

In previous code for Win Xp etc I set some custom file properties as in the code below. I now find in Win7 that this locks my file because the pPropSetStg->Release() fails. But further, on Win 7 there are no custom file properties? Or at least they don''t work in the same way. I can''t find anything about why this was changed or how to get around it. Does anyone know (or have a link to) the proper Win7 way to do this?




A partial answer... to make the built in custom properties appear for your file type, you neeed to add a registry key as per System Supplied Property Handlers[^].

I added the registry entry to display the four properties I''m after, however, the code below still doesn''t work (it won''t release, and doesn''t set the specified properties).

If I try then to edit the properties manually in Windows Explorer, I get..

"An unexpected error is keeping you from applying properties to the file...

Error 0x80004005: Unspecified Error"

USES_CONVERSION;
WCHAR wcFilename[1024];
IStorage *pStorage = NULL;
IPropertyStorage *pPropStg = NULL;
IPropertySetStorage *pPropSetStg = NULL;
PROPSPEC propspec[4];
PROPVARIANT propvarWrite[4];
HRESULT hr;
IID riid;

const FMTID fmtid = FMTID_SummaryInformation;
const int MAX_BIG_STRING_LEN = 1024;

setlocale(LC_ALL, "");
size_t i = mbstowcs(wcFilename, newName, strlen(newName));
setlocale(LC_ALL, "C");
wcFilename[i] = 0;

riid = IID_IPropertySetStorage;

hr = StgOpenStorageEx(wcFilename, STGM_READ|STGM_SHARE_DENY_WRITE, STGFMT_FILE, 0, NULL, NULL, riid, (void **)(&pStorage));
if (!FAILED(hr) && pStorage != NULL)
{
    hr = pStorage->QueryInterface(riid, (void **)&pPropSetStg);
    if (!FAILED(hr) && pPropSetStg != NULL)
    {
        hr = pPropSetStg->Create(fmtid, NULL, PROPSETFLAG_DEFAULT, STGM_CREATE|STGM_READWRITE|STGM_SHARE_EXCLUSIVE, &pPropStg);

        if (!FAILED(hr) && pPropStg != NULL)
        {
            propspec[0].ulKind = PRSPEC_PROPID;
            propspec[0].propid = PIDSI_TITLE;
            propvarWrite[0].vt = VT_LPWSTR;
            propvarWrite[0].pwszVal = A2W(MyTitle);

            propspec[1].ulKind = PRSPEC_PROPID;
            propspec[1].propid = PIDSI_SUBJECT;
            propvarWrite[1].vt = VT_LPWSTR;
            propvarWrite[1].pwszVal = A2W(MyDescription);

            propspec[2].ulKind = PRSPEC_PROPID;
            propspec[2].propid = PIDSI_AUTHOR;
            propvarWrite[2].vt = VT_LPWSTR;
            propvarWrite[2].pwszVal = A2W(MyAuthor);

            propspec[3].ulKind = PRSPEC_PROPID;
            propspec[3].propid = PIDSI_COMMENTS;
            propvarWrite[3].vt = VT_LPWSTR;
            propvarWrite[3].pwszVal = A2W(MyComments);

            hr = pPropStg->WriteMultiple(4, propspec, propvarWrite, NULL);
            if (!FAILED(hr))
            {
                hr = pPropStg->Commit(STGC_DEFAULT);
            }

            hr = pPropStg->Release();
            pPropStg = NULL;
        }

        hr = pPropSetStg->Release();
        pPropSetStg = NULL;
    }
}

推荐答案

好吧，据我所知，在Vista中，NTFS辅助信息流已被完全淘汰.因此，如果要在Win7中使用它，我现在必须开始编写Shell扩展处理程序.

显然，MS认为不适合保持任何中间立场.谢谢你.

Well, as far as I can Google, NTFS secondary info streams were completely ditched in Vista. So if I want this to work in Win7 I now have to start writing shell extension handlers.

Apparently MS didn''t see fit to keep any sort of middle ground. Thanks for that.

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