如何使用 ListBlobsSegmentedAsync 从 Azure BLOB 中的目录中获取所有文件

Question

在尝试访问 Azure blob 文件夹的所有文件时，获取示例代码container.ListBlobs();但它看起来像旧的。

旧代码： container.ListBlobs();

新代码尝试： container.ListBlobsSegmentedAsync(continuationToken);

我正在尝试使用以下代码：

container.ListBlobsSegmentedAsync(continuationToken);

文件夹是这样的：

Container/F1/file.json
Container/F1/F2/file.json
Container/F2/file.json

寻找更新版本以从 Azure 文件夹中获取所有文件。任何示例代码都会有所帮助，谢谢！

Answer 1

这是答案的代码：

private async Task<List<IListBlobItem>> ListBlobsAsync(CloudBlobContainer container)
{
    BlobContinuationToken continuationToken = null;
    List<IListBlobItem> results = new List<IListBlobItem>();
    do
    {
       bool useFlatBlobListing = true;
       BlobListingDetails blobListingDetails = BlobListingDetails.None;
       int maxBlobsPerRequest = 500;
       var response = await container.ListBlobsSegmentedAsync(BOAppSettings.ConfigServiceEnvironment, useFlatBlobListing, blobListingDetails, maxBlobsPerRequest, continuationToken, null, null);
            continuationToken = response.ContinuationToken;
            results.AddRange(response.Results);
        }
     while (continuationToken != null);
     return results;
}

然后你可以返回如下值：

IEnumerable<IListBlobItem> listBlobs = await this.ListBlobsAsync(container);
foreach(CloudBlockBlob cloudBlockBlob in listBlobs)
  {
     BOBlobFilesViewModel boBlobFilesViewModel = new BOBlobFilesViewModel
     {
          CacheKey = cloudBlockBlob.Name,
          Name = cloudBlockBlob.Name
      };
      listBOBlobFilesViewModel.Add(boBlobFilesViewModel);
   }
//return listBOBlobFilesViewModel;

Answer 2

更新：使用Azure.Storage.Blobs v12 - Package从目录中获取所有文件名

var storageConnectionString = "DefaultEndpointsProtocol=...........=core.windows.net";
var blobServiceClient = new BlobServiceClient(storageConnectionString);

//get container
var container = blobServiceClient.GetBlobContainerClient("container_name");

List<string> blobNames = new List<string>();

//Enumerating the blobs may make multiple requests to the service while fetching all the values
//Blobs are ordered lexicographically by name
//if you want metadata set BlobTraits - BlobTraits.Metadata
var blobHierarchyItems = container.GetBlobsByHierarchyAsync(BlobTraits.None, BlobStates.None, "/");

await foreach (var blobHierarchyItem in blobHierarchyItems)
{
    //check if the blob is a virtual directory.
    if (blobHierarchyItem.IsPrefix)
    {
        // You can also access files under nested folders in this way,
        // of course you will need to create a function accordingly (you can do a recursive function)
        // var prefix = blobHierarchyItem.Name;
        // blobHierarchyItem.Name = "folderA\"
        // var blobHierarchyItems= container.GetBlobsByHierarchyAsync(BlobTraits.None, BlobStates.None, "/", prefix);     
    }
    else
    {
        blobNames.Add(blobHierarchyItem.Blob.Name);
    }
}

您可以在这里找到更多选项和示例。

这是nuget 包的链接。

Answer 3

C#代码：

   //connection string
    string storageAccount_connectionString = "**NOTE: CONNECTION STRING**";

    // Retrieve storage account from connection string.
    CloudStorageAccount storageAccount = CloudStorageAccount.Parse(storageAccount_connectionString);

    // Create the blob client.
    CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

    // Retrieve reference to a previously created container.
    CloudBlobContainer container = blobClient.GetContainerReference("**NOTE:NAME OF CONTAINER**");
    //The specified container does not exist

    try
    {
        //root directory
        CloudBlobDirectory dira = container.GetDirectoryReference(string.Empty);
        //true for all sub directories else false 
        var rootDirFolders = dira.ListBlobsSegmentedAsync(true, BlobListingDetails.Metadata, null, null, null, null).Result;

        foreach (var blob in rootDirFolders.Results)
        {
             Console.WriteLine("Blob", blob);
        }

    }
    catch (Exception e)
    {
        //  Block of code to handle errors
        Console.WriteLine("Error", e);

    }