如何列出 azure blob 存储中的容器？

Question

我正在开发一个社交网络应用程序。

我想在 azure 存储中为每个加入社交网络的用户（客户端）创建一个容器，这意味着 user1 有一个名为 container 1 的容器，在容器 1 内会有 xml 格式的用户 1 个人资料和一个用户 1 的头像。

同样，对于 user2，将在 azure blob 存储中创建容器 2，然后将用户 2 配置文件保存为 xml 格式和用户 2 的配置文件图片，就像这样，假设有 10 个用户10 个容器。

如果我想列出存储在 Azure 存储中与用户客户端 1 不同的 9 个容器中的所有 9 个用户的信息，我该怎么做？

我正在使用网络服务，但我面临的挑战是如何收集位于 9 个不同容器中的所有 9 个用户配置文件信息。

Answer 1

以下应该可以解决问题 -

            CloudStorageAccount account =
            CloudStorageAccount.FromConfigurationSetting("DataConnectionString");
        // We need to access blobs now, so create a CloudBlobClient
        CloudBlobClient blobClient = account.CreateCloudBlobClient();

        IEnumerable<CloudBlobContainer> containers = blobClient.ListContainers();

Answer 2

对于较新版本的 Microsoft.WindowsAzure.Storage，请使用 CloudBlobClient.ListContainersSegmentedAsync 方法的正确变体。示例用法如下：

private static async Task<IEnumerable<CloudBlobContainer>> ListContainersAsync(CloudBlobClient cloudBlobClient)
{
    BlobContinuationToken continuationToken = null;
    var containers = new List<CloudBlobContainer>();

    do
    {
        ContainerResultSegment response = await cloudBlobClient.ListContainersSegmentedAsync(continuationToken);
        continuationToken = response.ContinuationToken;
        containers.AddRange(response.Results);

    } while (continuationToken != null);

    return containers;
}

上述方法的用法如下：

string connectionString = "<your connection string>";
CloudStorageAccount.TryParse(connectionString, out CloudStorageAccount storageAccount);

if (storageAccount == null)
{
    Console.WriteLine("Connection string did not work");
}

CloudBlobClient cloudBlobClient = storageAccount.CreateCloudBlobClient();
var containers = await ListContainersAsync(cloudBlobClient);

或者，您可以按如下方式创建扩展方法：

public static class CloudBlobClientExtension
{
    public static async Task<IEnumerable<CloudBlobContainer>> ListContainersAsync(this CloudBlobClient cloudBlobClient)
    {
        BlobContinuationToken continuationToken = null;
        var containers = new List<CloudBlobContainer>();

        do
        {
            ContainerResultSegment response = await cloudBlobClient.ListContainersSegmentedAsync(continuationToken);
            continuationToken = response.ContinuationToken;
            containers.AddRange(response.Results);

        } while (continuationToken != null);

        return containers;
    }
}

上述扩展方法的用法如下：

string connectionString = "<your connection string>";
CloudStorageAccount.TryParse(connectionString, out CloudStorageAccount storageAccount);

if (storageAccount == null)
{
    Console.WriteLine("Connection string did not work");
}

CloudBlobClient cloudBlobClient = storageAccount.CreateCloudBlobClient();
IEnumerable<CloudBlobContainer> containers = await cloudBlobClient.ListContainersAsync();

更多详情请参考MSDN和Balkan's Blog

对于较旧的 Azure 存储版本，请使用 CloudBlobClient.ListContainers 方法。示例用法如下：

string connectionString = "<your connection string>";
CloudStorageAccount.TryParse(connectionString, out CloudStorageAccount storageAccount);

if (storageAccount == null)
{
    Console.WriteLine("Connection string did not work");
}

CloudBlobClient cloudBlobClient = storageAccount.CreateCloudBlobClient();
var containers = cloudBlobClient.ListContainers();

Answer 3

适用于 .NET 的 Azure Blob 存储客户端库 v12

using Azure;
using Azure.Storage.Blobs;

BlobServiceClient blobServiceClient = new BlobServiceClient(azStorageConnString);
var containerList = blobServiceClient.GetBlobContainers();

foreach (var container in containerList)
  // doImportantWork

Answer 4

CloudStorageAccount account =
    CloudStorageAccount.FromConfigurationSetting("DataConnectionString");

// We need to access blobs now, so create a CloudBlobClient
var blobClient = account.CreateCloudBlobClient();

IEnumerable<CloudBlobContainer> containers = blobClient.ListContainers();

// This will return you list of containers
var containerList = containers.Select(e => e.Name).Tolist();