Getting the PIDL of a IShellFolder (should be easy?.. but it's not!!)
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From: Eucloid on 12 Jul 2010 22:03 Hi! My endeavor is when launching my application, to select the last accessed folder of TreeView structure that was populated by the lpsfDesktop->EnumObjects(lpsfDesktop). When the tree is first initialized, it contains only My Computer, My Document, Network, and Recycle Bin. I'm basing my implementation on (Barretto VN 7/2002) project on koders.com. So what I tried to do is use ParseDisplayName() on the folder I want to navigate too in order to retrieve the PIDL. Then use SHBindToParent() function to get the parent's LPSHELLFOLDER pointer. But then I cannot get that folder PIDL to repeat the steps until reaching root. For example: [code] // szOleChar contains "C:\\Documents and Settings\\Eucloid\\My Documents\\"; hr = lpsfDeskTop->lpVtbl->ParseDisplayName(lpsfDeskTop, NULL, NULL, szOleChar, &chEaten, &pidl, &dwAttributes); // convert PIDL to LPSHELLFOLDER LPSHELLFOLDER psfFolder = NULL; hr = SHBindToParentLocal(pidl, &IID_IShellFolder, &psfFolder, &pidlLast); // Then how do I get the psfFolder's pidl? With the pidl, I could bind again to the Parent folder. [/code] (ii) Is this the right way to do that? I also don't know how to match the "My Document" to "C:\\Documents and Settings\\Eucloid\\My Documents \\"; I tried IShellFolder->CompareIDs(), and ILIsParent() without success. I really don't know why ILIsParent doesn't work. That would have been a solution to what I want to do. Thanks. And I'll post the answer if I ever find it. Francois
From: jon on 12 Jul 2010 22:51 I'm not 100% sure what you want to do, but what I _think_ you want to do is walk the folder tree in reverse. If you want to get the parent of a PIDL, as a PIDL, you don't need to bind to the folder first - just chop off the last SHITEMID in the PIDL (the equivalent for a string path is removing the last component of the path). The ILRemoveLastID function can do that for you. Apologies if that's not what you're asking - maybe you could give a more detailed example of what you're hoping to achieve. Cheers, Jon On 13 July, 12:03, Eucloid <eucl...(a)gmail.com> wrote: > Hi! > > My endeavor is when launching my application, to select the last > accessed folder of TreeView structure that was populated by the > lpsfDesktop->EnumObjects(lpsfDesktop). When the tree is first > initialized, it contains only My Computer, My Document, Network, and > Recycle Bin. I'm basing my implementation on (Barretto VN 7/2002) > project on koders.com. > > So what I tried to do is use ParseDisplayName() on the folder I want > to navigate too in order to retrieve the PIDL. Then use > SHBindToParent() function to get the parent's LPSHELLFOLDER pointer. > But then I cannot get that folder PIDL to repeat the steps until > reaching root. For example: > > [code] > // szOleChar contains "C:\\Documents and Settings\\Eucloid\\My > Documents\\"; > hr = lpsfDeskTop->lpVtbl->ParseDisplayName(lpsfDeskTop, NULL, NULL, > szOleChar, &chEaten, &pidl, &dwAttributes); > // convert PIDL to LPSHELLFOLDER > LPSHELLFOLDER psfFolder = NULL; > hr = SHBindToParentLocal(pidl, &IID_IShellFolder, &psfFolder, > &pidlLast); > // Then how do I get the psfFolder's pidl? With the pidl, I could bind > again to the Parent folder. > [/code] > > (ii) Is this the right way to do that? I also don't know how to match > the "My Document" to "C:\\Documents and Settings\\Eucloid\\My Documents > \\"; I tried IShellFolder->CompareIDs(), and ILIsParent() without > success. I really don't know why ILIsParent doesn't work. That would > have been a solution to what I want to do. > > Thanks. And I'll post the answer if I ever find it. > Francois
From: Eucloid on 13 Jul 2010 11:21
Yeah this is exactly what I wanted to do : walk the folder tree in reverse. Thanks! I'm going to try it when I get back home after work. Francois On Jul 12, 10:51 pm, jon <jpot...(a)gmail.com> wrote: > I'm not 100% sure what you want to do, but what I _think_ you want to > do is walk the folder tree in reverse. > > If you want to get the parent of a PIDL, as a PIDL, you don't need to > bind to the folder first - just chop off the last SHITEMID in the PIDL > (the equivalent for a string path is removing the last component of > the path). The ILRemoveLastID function can do that for you. > > Apologies if that's not what you're asking - maybe you could give a > more detailed example of what you're hoping to achieve. > > Cheers, > Jon > |