c# - Get File inside a folder with getFilesAsync and getFoldersAsync -


having this

public ireadonlylist<storagefolder> folderlist;

and it

folderlist = await musicfolder.getfoldersasync(commonfolderquery.groupbyalbum);

i should have folders inside music folder (musicfolder knownfolders.musiclibrary)

but when inside cicle try 

for (int i=0; i<folderlist.count; i++)                     {                         if (folderlist[i].name==(lbmusic_albums.selecteditem songstruct).songname)                         {                              storagefolder current = folderlist[i];                              ireadonlylist<storagefile> tempfilelist = await current.getfilesasync(commonfilequery.orderbyname); //other code

i on await line system argument exception.. not understand why, passing correctly?

system.argumentexception: value not fall within expected range. @ windows.storage.storagefolder.getfilesasync(commonfilequery query) @ dus.mainpage.d__31.movenext()

solved in way :d

folderlib = await musicfolder.getfoldersasync(commonfolderquery.groupbyalbum); //obtaining folders , every folder    foreach(storagefolder item in folderlib)  {  // take subfolder      subfolderlib = await item.getfilesasync();     // , stuff  }

folderlib , subfolderlib were

public ireadonlylist<storagefile> subfolderlib;  public ireadonlylist<storagefolder> folderlib;

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