将 byte[] 上传到 Azure 文件存储的建议代码

Question

我无法从Microsoft中找到有关正确使用 CloudFile 类从 MVC 应用程序中将文件上传到 Azure 文件存储的示例。 Microsoft的文档显示了 CloudFile。UploadFromByteArrayAsync 方法。由于我将文件内容作为字节[]，因此UploadFromByteArrayAsync似乎是将文件内容保存到Azure共享上的文件位置的正确方法。

但是 CloudFile 类也有开始上传和结束上传方法。在什么情况下我需要使用这些方法？

Answer 1

使用这些

方法的正确方法是什么？

据我所知，UploadFromByteArrayAsync 方法将返回一个执行异步操作的任务，将字节数组的内容上传到文件。

它会将数据异步传输到 can 文件。

更多详细信息，您可以参考以下代码：

CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
"connectionstring");
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
CloudFileShare share = fileClient.GetShareReference("filesharename");
CloudFileDirectory rootDir = share.GetRootDirectoryReference();

int size = 5 * 1024 * 1024;
byte[] buffer = new byte[size];
Random rand = new Random();
rand.NextBytes(buffer);
CloudFile file = rootDir.GetFileReference("Log3.txt");
file.UploadFromByteArrayAsync(buffer, 0, buffer.Length);

方法开始异步操作，将字节数组的内容上载到文件。

通过使用此方法，程序会将数据异步传输到 can 文件作为 UploadFromByteArrayAsync。

如果要使用方法，则需要创建一个回调方法，以便在异步操作完成时接收通知。

更多详细信息，您可以参考以下代码：

static void Main(string[] args)
{
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
"connectionstring");
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
CloudFileShare share = fileClient.GetShareReference("fileshare");
CloudFileDirectory rootDir = share.GetRootDirectoryReference();

int size = 5 * 1024 * 1024;
byte[] buffer = new byte[size];
Random rand = new Random();
rand.NextBytes(buffer);
CloudFile file = rootDir.GetFileReference("Log3.txt");
//This string will pass to the callback function
string result = "aa";
//Begins an asynchronous operation to upload the contents of a byte array to a file. If the file already exists on the service, it will be overwritten.
var res = file.BeginUploadFromByteArray(buffer, 0, buffer.Length, ProcessInformation, result);

}
static void ProcessInformation(IAsyncResult result)
{
//The callback delegate that will receive notification when the asynchronous operation completes.
string Name = (string)result.AsyncState;
//this Name is aa
Console.WriteLine(Name);
Console.WriteLine("Complete");
}

EndUploadFromByteArray 方法将等待 BeginUploadFromByteArray 方法完全执行。

关于如何使用它，您可以参考以下代码：

static void Main(string[] args)
{
// TableTest();
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
"connectionstring");
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
CloudFileShare share = fileClient.GetShareReference("fileshare");
CloudFileDirectory rootDir = share.GetRootDirectoryReference();

int size = 5 * 1024 * 1024;
byte[] buffer = new byte[size];
Random rand = new Random();
rand.NextBytes(buffer);
CloudFile file = rootDir.GetFileReference("Log3.txt");
file.UploadFromByteArrayAsync(buffer, 0, buffer.Length);
string result = "aa";
//Begins an asynchronous operation to upload the contents of a byte array to a file. If the file already exists on the service, it will be overwritten.
var res = file.BeginUploadFromByteArray(buffer, 0, buffer.Length, ProcessInformation, result);
//Ends an asynchronous operation to upload the contents of a byte array to a file.
//wait for the BeginUploadFromByteArray method execute completely then continue run the codes
file.EndUploadFromByteArray(res);
Console.ReadLine();
}
static void ProcessInformation(IAsyncResult result)
{
//The callback delegate that will receive notification when the asynchronous operation completes.
string Name = (string)result.AsyncState;
//this Name is aa
Console.WriteLine(Name);
Console.WriteLine("Complete");

}

Answer 2

试试这个：

CloudStorageAccount storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("StorageConnectionString"));
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference(containerName.ToString().ToLower());
await container.CreateIfNotExistsAsync();
// Retrieve reference to blob
CloudBlockBlob blockBlob = container.GetBlockBlobReference(blobRef);
// Upload the file
await blockBlob.UploadFromByteArrayAsync(myByteArray, 0, myByteArray.Length);