通过使用 Microsoft windows SDK 7.0、explorerDataProvider,我在 windows 7 上安装了一个虚拟文件夹。
当我从应用程序打开文件浏览对话框时,
CFileDialog dlg(TRUE, NULL, 0, OFN_ENABLESIZING | OFN_ALLOWMULTISELECT, L"all(*.*)|*.*||", this);
INT_PTR result = dlg.DoModal();
if (result == IDOK)
{
.
.
.
//some actions
}
它还可以显示虚拟文件夹:
但是当我选择文件时,像“零”可以然后点击“打开”,
我试图添加断点
INT_PTR result = dlg.DoModal();
但似乎这个错误发生在里面DoModal()
。
我做了一些研究并修改了虚拟文件夹的代码:
HRESULT CFolderViewImplFolder::GetAttributesOf(UINT cidl, PCUITEMID_CHILD_ARRAY apidl, ULONG *rgfInOut)
{
// If SFGAO_FILESYSTEM is returned, GetDisplayNameOf(SHGDN_FORPARSING) on that item MUST
// return a filesystem path.
HRESULT hr = E_INVALIDARG;
DWORD dwAttribs = 0;
dwAttribs |= SFGAO_BROWSABLE;
if (1 == cidl)
{
int nLevel = 0;
hr = _GetLevel(apidl[0], &nLevel);
if (SUCCEEDED(hr))
{
BOOL fIsFolder = FALSE;
hr = _GetFolderness(apidl[0], &fIsFolder);
if (SUCCEEDED(hr))
{
if (fIsFolder)
{
dwAttribs |= SFGAO_FOLDER;
dwAttribs |= SFGAO_FILESYSANCESTOR;
}
else
{
dwAttribs |= SFGAO_SYSTEM;
dwAttribs |= SFGAO_FILESYSTEM;
}
if (nLevel < g_nMaxLevel)
{
dwAttribs |= SFGAO_HASSUBFOLDER;
}
}
}
}
*rgfInOut &= dwAttribs;
return hr;
}
并返回路径GetDisplayNameOf()
HRESULT CFolderViewImplFolder::GetDisplayNameOf(PCUITEMID_CHILD pidl, SHGDNF shgdnFlags, STRRET *pName)
{
HRESULT hr = S_OK;
if (shgdnFlags & SHGDN_FORPARSING)
{
WCHAR szDisplayName[MAX_PATH];
if (shgdnFlags & SHGDN_INFOLDER)
{
// This form of the display name needs to be handled by ParseDisplayName.
hr = _GetName(pidl, szDisplayName, ARRAYSIZE(szDisplayName));
}
else
{
PWSTR pszThisFolder = L"Computer\\Jerry";
StringCchCopy(szDisplayName, ARRAYSIZE(szDisplayName), pszThisFolder);
StringCchCat(szDisplayName, ARRAYSIZE(szDisplayName), L"\\");
WCHAR szName[MAX_PATH];
hr = _GetName(pidl, szName, ARRAYSIZE(szName));
if (SUCCEEDED(hr))
{
StringCchCat(szDisplayName, ARRAYSIZE(szDisplayName), szName);
}
}
if (SUCCEEDED(hr))
{
hr = StringToStrRet(szDisplayName, pName);
}
}
else
{
PWSTR pszName;
hr = _GetName(pidl, &pszName);
if (SUCCEEDED(hr))
{
hr = StringToStrRet(pszName, pName);
CoTaskMemFree(pszName);
}
}
return hr;
}
但它仍然在应用程序中统计“路径不存在”的错误消息。我在 中添加断点GetDisplayNameOf
,但是当应用程序打开文件浏览对话框时它永远不会触发。但是如果我只是双击“计算机”打开一个普通文件夹,它就会被触发。
“路径不存在”的错误消息似乎不能被弃用或覆盖。有什么方法可以修改虚拟文件夹以返回正确的路径?
更新:我试过IFileDialog
了,我从 MSDN 示例、代码中复制了代码,并添加了断点,看看会发生什么。然而,
// Show the dialog
hr = pfd->Show(NULL);//the breakpoint is added here
if (SUCCEEDED(hr))
{
// Obtain the result once the user clicks
// the 'Open' button.
// The result is an IShellItem object.
IShellItem *psiResult;
hr = pfd->GetResult(&psiResult);
if (SUCCEEDED(hr))
{
//do something
}
}
当我单击“打开”按钮时,仍然出现“路径不存在,检查路径并重试”的错误消息框。pfd->Show(NULL)
在我单击“打开”按钮后,它永远不会出现。
根据示例代码中的注释,它应该出现hr = pfd->Show(NULL);
并到达下一行。但是错误消息发生在hr = pfd->Show(NULL);
.
更新:
在中IFileDialog
,我尝试了
hr = pfd->GetOptions(&dwFlags);
if (SUCCEEDED(hr))
{
hr = pfd->SetOptions(dwFlags | FOS_ALLNONSTORAGEITEMS);
if (SUCCEEDED(hr))
{
// Show the dialog
hr = pfd->Show(NULL);
if (SUCCEEDED(hr))
{
// Obtain the result once the user clicks
// the 'Open' button.
// The result is an IShellItem object.
IShellItem *psiResult;
hr = pfd->GetResult(&psiResult);
if (SUCCEEDED(hr))
{
// We are just going to print out the
// name of the file for sample sake.
PWSTR pszFilePath = NULL;
hr = psiResult->GetDisplayName(SIGDN_FILESYSPATH,
&pszFilePath);
if (SUCCEEDED(hr))
{
TaskDialog(NULL,
NULL,
L"CommonFileDialogApp",
pszFilePath,
NULL,
TDCBF_OK_BUTTON,
TD_INFORMATION_ICON,
NULL);
CoTaskMemFree(pszFilePath);
}
psiResult->Release();
}
}
}
我也试过
hr = pfd->SetOptions(dwFlags);//delete FOS_FORCEFILESYSTEM
并尝试过
DWORD dwFlags = 0;
if (SUCCEEDED(hr))
{
// overwrite options completely
hr = pfd->SetOptions(dwFlags | FOS_ALLNONSTORAGEITEMS);
我还尝试在命名空间扩展代码中返回全名:
WCHAR szDisplayName[MAX_PATH];
if (shgdnFlags & SHGDN_INFOLDER)
{
// This form of the display name needs to be handled by ParseDisplayName.
hr = _GetName(pidl, szDisplayName, ARRAYSIZE(szDisplayName));
}
else
{
PWSTR pszThisFolder;// = L"Computer\\Jerry";
hr = SHGetNameFromIDList(m_pidl, (shgdnFlags & SHGDN_FORADDRESSBAR) ? SIGDN_DESKTOPABSOLUTEEDITING : SIGDN_DESKTOPABSOLUTEPARSING, &pszThisFolder);
if (SUCCEEDED(hr))
{
StringCchCopy(szDisplayName, ARRAYSIZE(szDisplayName), pszThisFolder);
StringCchCat(szDisplayName, ARRAYSIZE(szDisplayName), L"\\");
WCHAR szName[MAX_PATH];
hr = _GetName(pidl, szName, ARRAYSIZE(szName));
if (SUCCEEDED(hr))
{
StringCchCat(szDisplayName, ARRAYSIZE(szDisplayName), szName);
}
CoTaskMemFree(pszThisFolder);
}
}
if (SUCCEEDED(hr))
{
hr = StringToStrRet(szDisplayName, pName);
}
更新:
hr = pfd->SetOptions(dwFlags | FOS_ALLNONSTORAGEITEMS | FOS_NOVALIDATE);
这对我有用!