How to use OrderByDescending on Properties using IListFileItem?

Question

I have following code which will return all list items (files and folders) of specific given azure storage path.

I want to filter it using OrderByDescending based on Property LastModified

How to achieve this ?

 // Get list of all files/directories on the file share 
CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(ConfigurationManager.AppSettings["storageConnectionString"]);
CloudFileClient fileClient = cloudStorageAccount.CreateCloudFileClient();
CloudFileShare fileShare = fileClient.GetShareReference(ConfigurationManager.AppSettings["shareName"]);

var sourceName = fileShare.GetRootDirectoryReference().GetDirectoryReference((ConfigurationManager.AppSettings["sourceName"]));
IEnumerable<IListFileItem> fileList = sourceName.ListFilesAndDirectories();
var test = (fileList.OrderByDescending(t => t.Uri.AbsolutePath).FirstOrDefault());

I tried with casting but LastModified is null

            fileList.ToList().ForEach(x => ((CloudFileDirectory)x).FetchAttributes());
GetAllSubDir(fileList.OrderByDescending(t => ((CloudFileDirectory)t).Properties.LastModified.Value).FirstOrDefault());

instead of Uri.AbsolutePath I want to use LastModified.

Answer 1

Have a try at following code. You need to get all files first because ListFilesAndDirectories only returns files and directory in a single level.

    List<CloudFile> list = new List<CloudFile>();

    public void Test()
    {
        CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(ConfigurationManager.AppSettings["storageConnectionString"]);
        CloudFileClient fileClient = cloudStorageAccount.CreateCloudFileClient();
        CloudFileShare fileShare = 
        fileClient.GetShareReference(ConfigurationManager.AppSettings["shareName"]);

        var sourceName = fileShare.GetRootDirectoryReference().GetDirectoryReference((ConfigurationManager.AppSettings["sourceName"]));
        IEnumerable<IListFileItem> fileList = sourceName.ListFilesAndDirectories();
        listFile(fileList);

        var test = (from file in list
                      orderby file.Properties.LastModified descending
                      select file).FirstOrDefault();

    }

    // detect all files in the directory
    public void listFile(IEnumerable<IListFileItem> results)
    {
        foreach (IListFileItem fileItem in results)
        {
            if (fileItem.GetType() == typeof(CloudFileDirectory))
            {
                CloudFileDirectory directory = (CloudFileDirectory)fileItem;
                var res = directory.ListFilesAndDirectories();
                listFile(res);
            }
            else
            {
                CloudFile file = (CloudFile)fileItem;
                file.FetchAttributes();
                list.Add(file);
            }
        }
    }