How to get log files sorted by date in Windows 8.1 app (QueryOptions give me an exception)?

Question

In my windows8.1 app, I have some logs and I want to read them by time, I had code below

List<string> fileFilter = new List<string>();
        fileFilter.Add(".ERROR");
        StorageFolder folder = ApplicationData.Current.LocalFolder;
        QueryOptions queryOptions = new QueryOptions(CommonFileQuery.OrderBySearchRank, fileFilter);
        var query = folder.CreateFileQueryWithOptions(queryOptions);
        IReadOnlyList<StorageFile> filteredFiles = await query.GetFilesAsync();
        if(filteredFiles.Count > 0)
        {
            err = filteredFiles[0].ToString();
        }
        return err;

However, new QueryOptions(CommonFileQuery.OrderBySearchRank, fileFilter); gives an not implemented exception. Is there any solution?

score 0 · Answer 1 · answered Feb 24 '17 at 12:05

0

You need to get all the files using GetFilesAsync() on the folder and sort them by yourself.

answered Feb 24 '17 at 12:05

Igor Kulman

16,211
10
57
118

But since MSFT provide this query method, why don't we use it? The interesting thing is that on another machine, it works... – litaoshen Feb 24 '17 at 18:30
When developing Windows Phone 8.1 they tried to make the API the same as on Windows 8.1 .. but they did not implement everything. There are many API that are there but are not implemented. – Igor Kulman Feb 24 '17 at 18:56
Do you know any API I can use here instead of QueryOptions? Thanks! – litaoshen Feb 27 '17 at 21:14
Nothing I can recall, you really have to do the seorting yourself – Igor Kulman Feb 28 '17 at 08:42
OK, thank you! Seems I have to sort it by myself then. – litaoshen Feb 28 '17 at 18:04

How to get log files sorted by date in Windows 8.1 app (QueryOptions give me an exception)?

1 Answers1