从Azure Blob c#下载图像

Question

我正在尝试使用:

从Azure存储blob下载图像(.jpg):

public static async Task DownloadToTemp(string path, string fileName)
{
string storageAccount_connectionString = "CONNECTION STRING";
CloudStorageAccount mycloudStorageAccount = CloudStorageAccount.Parse(storageAccount_connectionString);
CloudBlobClient blobClient = mycloudStorageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference(CONTAINER);
CloudBlockBlob cloudBlockBlob = container.GetBlockBlobReference(fileName);
// provide the file download location below            
Stream file = File.OpenWrite(path);    

await cloudBlockBlob.DownloadToStreamAsync(file);
file.Close();
return;
}

但是当我尝试打开图像作为位图Bitmap image = new Bitmap(path)时，我得到错误System.ArgumentException: 'Parameter is not valid.'。我正在使用呼叫BlobHandler.DownloadToTemp(path, file).GetAwaiter()来确保文件已下载。

Answer 1

所以问题在于没有完全等待图像被存储:添加:

await BlobHandler.DownloadToTemp(path, file);

确保文件被完全下载(这意味着callerfunction必须是异步的)。