Ejemplo n.º 1
0
        private bool RunDialogDownlevel(IntPtr owner)
        {
            IntPtr rootItemIdList   = IntPtr.Zero;
            IntPtr resultItemIdList = IntPtr.Zero;

            if (NativeMethods.SHGetSpecialFolderLocation(owner, RootFolder, ref rootItemIdList) != 0)
            {
                if (NativeMethods.SHGetSpecialFolderLocation(owner, 0, ref rootItemIdList) != 0)
                {
                    throw new InvalidOperationException("Unable to retrieve the root folder.");
                }
            }
            try
            {
                NativeMethods.BROWSEINFO info = new NativeMethods.BROWSEINFO
                {
                    hwndOwner      = owner,
                    lpfn           = new NativeMethods.BrowseCallbackProc(BrowseCallbackProc),
                    lpszTitle      = Description,
                    pidlRoot       = rootItemIdList,
                    pszDisplayName = new string('\0', 260),
                    ulFlags        = NativeMethods.BrowseInfoFlags.NewDialogStyle | NativeMethods.BrowseInfoFlags.ReturnOnlyFsDirs
                };
                if (!ShowNewFolderButton)
                {
                    info.ulFlags |= NativeMethods.BrowseInfoFlags.NoNewFolderButton;
                }
                resultItemIdList = NativeMethods.SHBrowseForFolder(ref info);
                if (resultItemIdList != IntPtr.Zero)
                {
                    StringBuilder path = new StringBuilder(260);
                    NativeMethods.SHGetPathFromIDList(resultItemIdList, path);
                    SelectedPath = path.ToString();
                    return(true);
                }
                else
                {
                    return(false);
                }
            }
            finally
            {
                if (rootItemIdList != null)
                {
                    IMalloc malloc = NativeMethods.SHGetMalloc();
                    malloc.Free(rootItemIdList);
                    Marshal.ReleaseComObject(malloc);
                }
                if (resultItemIdList != null)
                {
                    Marshal.FreeCoTaskMem(resultItemIdList);
                }
            }
        }
 private bool RunDialogDownlevel(IntPtr owner)
 {
     IntPtr rootItemIdList = IntPtr.Zero;
     IntPtr resultItemIdList = IntPtr.Zero;
     if( NativeMethods.SHGetSpecialFolderLocation(owner, RootFolder, ref rootItemIdList) != 0 )
     {
         if( NativeMethods.SHGetSpecialFolderLocation(owner, 0, ref rootItemIdList) != 0 )
         {
             throw new InvalidOperationException(Properties.Resources.FolderBrowserDialogNoRootFolder);
         }
     }
     try
     {
         NativeMethods.BROWSEINFO info = new NativeMethods.BROWSEINFO();
         info.hwndOwner = owner;
         info.lpfn = new NativeMethods.BrowseCallbackProc(BrowseCallbackProc);
         info.lpszTitle = Description;
         info.pidlRoot = rootItemIdList;
         info.pszDisplayName = new string('\0', 260);
         info.ulFlags = NativeMethods.BrowseInfoFlags.NewDialogStyle | NativeMethods.BrowseInfoFlags.ReturnOnlyFsDirs;
         if( !ShowNewFolderButton )
             info.ulFlags |= NativeMethods.BrowseInfoFlags.NoNewFolderButton;
         resultItemIdList = NativeMethods.SHBrowseForFolder(ref info);
         if( resultItemIdList != IntPtr.Zero )
         {
             StringBuilder path = new StringBuilder(260);
             NativeMethods.SHGetPathFromIDList(resultItemIdList, path);
             SelectedPath = path.ToString();
             return true;
         }
         else
             return false;
     }
     finally
     {
         if( rootItemIdList != null )
         {
             IMalloc malloc = NativeMethods.SHGetMalloc();
             malloc.Free(rootItemIdList);
             Marshal.ReleaseComObject(malloc);
         }
         if( resultItemIdList != null )
         {
             Marshal.FreeCoTaskMem(resultItemIdList);
         }
     }
 }