Question

我正在尝试使用C＃将图像文件从本地系统上传到Azure Blob存储。下面是我正在使用的代码：

string storageConnectionString = "<connection_string>";
CloudStorageAccount storageacc = CloudStorageAccount.Parse(storageConnectionString);

CloudBlobClient blobClient = storageacc.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference("myblob");
container.CreateIfNotExists();

CloudBlockBlob blockBlob = container.GetBlockBlobReference("images");

using (var filestream = System.IO.File.OpenRead(@"C:\\Users\\John\\Desktop\\11173.jpg"))
{
    blockBlob.UploadFromStream(filestream);
}

我正在尝试创建名称为myblob的容器，该容器可以看到。在其中，我创建了一个名称为images的Blob，然后在其中上传了图像文件。但是我看不到图像文件。上面的代码有什么问题。如何将图像文件上传到Blob存储中。请帮忙。谢谢

Answer 1

我认为您有两件事错了。

myblob 是您的容器吗？ GetContainerReference要求您传入容器的名称，而不是Blob名称。我猜容器名称是图片。
GetBlockBlobReference 在您尝试上传的图像（blob）的容器中需要包含文件名的路径。

应该是这样的：

string storageConnectionString = "<connection_string>";
CloudStorageAccount storageacc = CloudStorageAccount.Parse(storageConnectionString);

CloudBlobClient blobClient = storageacc.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference("images");
container.CreateIfNotExists();

CloudBlockBlob blockBlob = container.GetBlockBlobReference("11173.jpg");

using (var filestream = System.IO.File.OpenRead(@"C:\\Users\\John\\Desktop\\11173.jpg"))
{
    blockBlob.UploadFromStream(filestream);
}

Answer 2

请尝试以下操作：

string storageConnectionString = "<connection_string>";
CloudStorageAccount storageacc = CloudStorageAccount.Parse(storageConnectionString);

CloudBlobClient blobClient = storageacc.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference("myblob");
container.CreateIfNotExists();

CloudBlockBlob blockBlob = container.GetBlockBlobReference("images/11173.jpg");
blockBlob.Properties.ContentType = "image/jpg";
using (var filestream = System.IO.File.OpenRead(@"C:\\Users\\John\\Desktop\\11173.jpg"))
{
    blockBlob.UploadFromStream(filestream);
}

基本上，以上代码将11173.jpg保存为images/11173.jpg。 Blob名称实际上是images/11173.jpg。

或者您可以尝试以下方法：

string storageConnectionString = "<connection_string>";
CloudStorageAccount storageacc = CloudStorageAccount.Parse(storageConnectionString);

CloudBlobClient blobClient = storageacc.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference("myblob");
container.CreateIfNotExists();

CloudBlockBlob blockBlob = container.GetBlockBlobReference("11173.jpg");
blockBlob.Properties.ContentType = "image/jpg";
using (var filestream = System.IO.File.OpenRead(@"C:\\Users\\John\\Desktop\\11173.jpg"))
{
    blockBlob.UploadFromStream(filestream);
}

Answer 3

在安装推荐的nuget pkg“ Azure.Storage.Blobs”（https://www.nuget.org/packages/Azure.Storage.Blobs/）之后，以下代码在.NET Core中工作

       public void PersistPhoto(IFormFile fileToPersist, string saveAsFileName)
       {
            string connectionString= "Azure Storage Connection String";
            string containerName= "Azure Storage Container Name";
            BlobContainerClient container = new BlobContainerClient(connectionString, containerName);

            try
            {
                // Get a reference to a blob
                BlobClient blob = container.GetBlobClient(saveAsFileName);

                // Open the file and upload its data
                using (Stream file = fileToPersist.OpenReadStream())
                {
                    blob.Upload(file);                  
                }

                uri = blob.Uri.AbsoluteUri;
            }
            catch
            {
                // log error
            }
        }

根据Microsoft的规定，NuGet pkg“ Microsoft.Azure.Storage.Blob”现已弃用。

如何将图像从本地系统上传到C＃中的Azure Blob存储

3 个答案: