我正在使用Azure Blob存储来保存一些文件。我在下载此视频流时遇到问题,不确定为什么。我没有任何错误,只是一个空流。我已验证文件在容器中存在,甚至运行了列出容器中所有文件的代码。任何帮助将不胜感激。
private async Task<MemoryStream> GetMemoryStreamAsync(string fileName)
{
var storageAccountName = Environment.GetEnvironmentVariable("storage_account_name");
var storageAccountKey = Environment.GetEnvironmentVariable("storage_access_key");
var storageContainerName = Environment.GetEnvironmentVariable("storage_container_name");
CloudStorageAccount storageAccount = new CloudStorageAccount(new Microsoft.WindowsAzure.Storage.Auth.StorageCredentials(storageAccountName, storageAccountKey), true);
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference(storageContainerName);
CloudBlockBlob blockBlob = container.GetBlockBlobReference(fileName);
MemoryStream stream = new MemoryStream();
await blockBlob.DownloadToStreamAsync(stream);
return stream;
}
答案 0 :(得分:1)
您需要在返回流之前将位置设置为零,以便流的使用者从头开始读取它。
MemoryStream stream = new MemoryStream();
await blockBlob.DownloadToStreamAsync(stream);
stream.Position = 0;
return stream;