GetBlockBlobReference未提供文件夹路径详细信息

Question

我正在尝试从Azure存储资源管理器中下载块Blob。我可以下载容器根目录中存在的所有块Blob。我无法下载嵌套在容器内子文件夹中的Blob 。

JobIntentService

Answer 1

我无法使用 GetBlockBlobReference（ fileName ）获得blockBlob的绝对路径。下面的代码解决了我的问题。我得到了清单，然后使用LINQ来获取具有绝对路径详细信息的blockBlob。 This post helped as well

public class ConcurrentMap<TKey, TValue> : Map<TKey, TValue>
{
    protected SlimLockWrapper __lock = new SlimLockWrapper();

    protected SlimLockWrapper _lock
    {
        get
        {
            if (__lock == null)
            {
                __lock = new SlimLockWrapper();
            }
            return __lock;
        }
    }

    public ConcurrentMap()
        : this(ProviderDefault)
    {
    }

    public ConcurrentMap(Func<TKey, TValue> provider)
        : base(provider)
    {
    }

    public ConcurrentMap(SerializationInfo info, StreamingContext context)
        : this(ProviderDefault)
    {
    }

    public override TValue this[TKey key]
    {
        get { return this._Get(key); }
        set { this._Set(key, value); }
    }

    public override TValue this[TKey key, TValue fallback]
    {
        get
        {
            return _lock.Read(() => base[key, fallback]);
        }
    }

    public override void Add(TKey key, TValue value)
    {
        _lock.Write(() => this._Set(key, value));
    }

    public override void Add(KeyValuePair<TKey, TValue> item)
    {
        _lock.Write(() => this._Set(item.Key, item.Value));
    }

    public override void AddRange(IEnumerable<KeyValuePair<TKey, TValue>> enumerable)
    {
        _lock.Write(() => {
            foreach (var pair in enumerable) {
                this._Set(pair.Key, pair.Value);
            }
        });
    }

    public override bool ContainsKey(TKey key)
    {
        return _lock.Read(() => this._dictionary.ContainsKey(key));
    }

    public override bool ContainsValue(TValue value)
    {
        return _lock.Read(() => this._dictionary.ContainsValue(value));
    }

    public override bool Contains(KeyValuePair<TKey, TValue> item)
    {
        return _lock.Read(() => this._dictionary.Contains(item));
    }

    public override ICollection<TKey> Keys
    {
        get { return _lock.Read(() => this._dictionary.Keys.ToList()); }
    }

    public override ICollection<TValue> Values
    {
        get { return _lock.Read(() => this._dictionary.Values.ToList()); }
    }

    public override bool Remove(TKey key)
    {
        return _lock.Write(() => this._dictionary.Remove(key));
    }

    public override bool TryGetValue(TKey key, out TValue value)
    {
        _lock.Lock.EnterReadLock();
        try {
            return this._dictionary.TryGetValue(key, out value);
        }
        finally {
            _lock.Lock.ExitReadLock();
        }
    }

    public override void Clear()
    {
        _lock.Write(() => this._dictionary = new Dictionary<TKey,TValue>());
    }

    public override int Count
    {
        get { return _lock.Read(() => this._dictionary.Count); }
    }

    public override bool Remove(KeyValuePair<TKey, TValue> item)
    {
        return _lock.Write(() => (this._dictionary as IDictionary<TKey, TValue>).Remove(item));
    }

    public override IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator()
    {
        return _lock.Read(() => this._dictionary.ToList().GetEnumerator());
    }

    public override void CopyTo(KeyValuePair<TKey, TValue>[] array, int index)
    {
        _lock.Read(() => (this._dictionary as IDictionary<TKey, TValue>).CopyTo(array, index));
    }
}

更正我是否还有其他有效方法可以从容器中的目录列表中提取blob信息。

Answer 2

只需使用Gaurav Mantri的answer中提到的ListBlobs即可检索所需子文件夹中的所有文件（blob）。然后遍历并下载：

var storageAccount = CloudStorageAccount.Parse("yourConnectionString");
var client = storageAccount.CreateCloudBlobClient();
var container = client.GetContainerReference("yourContainer");
var blobs = container.ListBlobs(prefix: "subdirectory1/subdirectory2", useFlatBlobListing: true);
foreach (var blob in blobs) 
{
    blob.DownloadToFileAsync("yourFilePath");
}

Answer 3

以下解决方案有助于访问目录（或文件夹路径）下的单个文件绝对路径。

public static String GetBlobUri(string dirPath, string fileName)
      {
           //Get a reference to a blob within the container.
         CloudStorageAccount storageAccount = CloudStorageAccount.Parse("Blob Key");
          CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
          CloudBlobContainer container = blobClient.GetContainerReference("Blob Container");
          CloudBlockBlob blockBlob = container.GetBlockBlobReference(dirPath+fileName);

        return blockBlob.Uri.AbsoluteUri;
    }

希望这可以帮助尝试访问基于多级目录（Level1 / Level2 / Level3）路径的Blob文件路径。