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如何使用C#将文件上载到Azure Blob存储?

azure-blob-storage azure-storage-blobs azure-storage azure c#

Junior · 技术社区 · 7 年前

我想将我的存储从本地更改为Azure blob存储。我下载了 WindowsAzure.Storage

我有以下接口

public interface IStorage
{
    Task Create(Stream stram, string path);
}

public interface IBlobContainerFactory
{
    CloudBlobContainer Get();
}

这是我的Azure实现

public class AzureBlobStorage : IStorage
{
    private IBlobContainerFactory ContainerFactory

    public AzureBlobStorage(IBlobContainerFactory containerFactory)
    {
        ContainerFactory = containerFactory;
    }

    public async Task Create(Stream stream, string path)
    {
        CloudBlockBlob blockBlob = ContainerFactory.Get().GetBlockBlobReference(path);

        await blockBlob.UploadFromStreamAsync(stream);
    }
}

然后,在我的 program.cs 我尝试了以下方法

if (Configuration["Default:StorageType"].Equals("Azure", StringComparison.CurrentCultureIgnoreCase))
{
    services.AddSingleton(opts => new AzureBlobOptions
    {
        ConnectionString = Configuration["Storages:Azure:ConnectionString"],
        DocumentContainer = Configuration["Storages:Azure:DocumentContainer"]
    });

    services.AddSingleton<IBlobContainerFactory, DefaultBlobContainerFactory>();
    services.AddScoped<IStorage, AzureBlobStorage>();
}
else
{
    services.AddScoped<IStorage, LocalStorage>();
}

Container = services.BuildServiceProvider();

// Resolve the storage from the IoC container
IStorage storage = Container.GetService<IStorage>();

// Read a local file
using (FileStream file = File.Open(@"C:\Screenshot_4.png", FileMode.Open))
{
    try
    {
        // write it to the storeage
        storage.Create(file, "test/1.png");
    }
    catch (Exception e)
    {

    }
}

AzureBlobStorage 什么也没发生。文件不会写入存储,也不会引发异常!

请注意,当我在中更改配置时 Default:StorageType Local 该文件按预期在本地写入。但无法将其写入Azure博客。

2 回复 | 直到 7 年前

Random 7 年前

我关注了这篇文章: https://docs.microsoft.com/en-us/dotnet/api/overview/azure/storage?view=azure-dotnet

public interface IStorage
{
    Task Create(Stream stream, string path);
}

public class AzureBlobStorage : IStorage
{
    public async Task Create(Stream stream, string path)
    {
        // Initialise client in a different place if you like
        string storageConnectionString = "DefaultEndpointsProtocol=https;"
                    + "AccountName=[ACCOUNT]"
                    + ";AccountKey=[KEY]"
                    + ";EndpointSuffix=core.windows.net";

        CloudStorageAccount account = CloudStorageAccount.Parse(storageConnectionString);
        var blobClient = account.CreateCloudBlobClient();

        // Make sure container is there
        var blobContainer = blobClient.GetContainerReference("test");
        await blobContainer.CreateIfNotExistsAsync();

        CloudBlockBlob blockBlob = blobContainer.GetBlockBlobReference(path);
        await blockBlob.UploadFromStreamAsync(stream);
    }
}

class Program
{
    static void Main(string[] args)
    {
        // Put your DI here
        var storage = new AzureBlobStorage();

        // Read a local file
        using (FileStream file = File.Open(@"C:\cartoon.PNG", FileMode.Open))
        {
            try
            {
                // Pattern to run an async code from a sync method
                storage.Create(file, "1.png").ContinueWith(t =>
                {
                    if (t.IsCompletedSuccessfully)
                    {
                        Console.Out.WriteLine("Blob uploaded");
                    }
                }).Wait();
            }
            catch (Exception e)
            {
                // Omitted
            }
        }
    }
}

Rahul Ruikar 7 年前

您可能想看看这个线程。

ASP.NET Web API Azure Blob Storage Unstructured