Windows Universal App - Download all Blobs from Az

问题:

I have a Universal Windows app.

I am trying to download all blobs from an azure container when the app starts. This is my code:

 public MainPage()
    {
        this.InitializeComponent();
        downloadblobs();
    }

public async void downloadblobs()
{
    CloudStorageAccount storageaccount = new CloudStorageAccount(new StorageCredentials("accountname", "accountkey"), true);
    CloudBlobClient blobClient = storageaccount.CreateCloudBlobClient();
    CloudBlobContainer container = blobClient.GetContainerReference("ContainerName");

    //---------------------
    int fileName = 1;
    var client = storageaccount.CreateCloudBlobClient();
    BlobContinuationToken continuationToken = null;
    string prefix = null;
    bool useFlatBlobListing = true;
    BlobListingDetails blobListingDetails = BlobListingDetails.All;
    int maxBlobsPerRequest = 2500;
    List<IListBlobItem> blobs = new List<IListBlobItem>();
    do
    {
        var listingResult = await container.ListBlobsSegmentedAsync(prefix, useFlatBlobListing, blobListingDetails, maxBlobsPerRequest, continuationToken, null, null);
        continuationToken = listingResult.ContinuationToken;
        blobs.AddRange(listingResult.Results);
        using (var fileStream = System.IO.File.OpenWrite(@"\NewImages\" + fileName + ".jpg"))
        {
            var blobReference = blobClient.GetBlobReferenceFromServerAsync(blobs.Uri);
            File downloadedFile = new File(blobReference + ".jpg");
            fileName++;
        }
    }
    while (continuationToken != null);
}

Im getting errors on two lines:

            var blobReference = blobClient.GetBlobReferenceFromServerAsync(blobs.Uri);
            File downloadedFile = new File(blobReference + ".jpg");

My errors are:

ListBlobItem does not contain a definition of Uri.

Cannot declare variable of static type File.

and

Cannot create an instance of the static class file.

回答1:

You need to enumerate the blobs in the container, with container.listBlobsSegmentedAsync(). The container reference doesn't just have a list of blobs automatically downloaded with it.

For reference, see here.