CloudBlobContainer.SetPermissions (Método) (BlobContainerPermissions)

static void CreateSAS()
{
    //Retrieve storage account information from an app.config file.
    //This is one way to store and retrieve a connection string if you are writing an application 
    //that will run locally, rather than in Windows Azure.
    CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConfigurationManager.AppSettings["StorageAccountConnectionString"]);

    //Create the blob client object.
    CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

    //Get a reference to the container for which the shared access signature will be created.
    CloudBlobContainer container = blobClient.GetContainerReference("mysascontainer");
    container.CreateIfNotExist();

    //Create a permission policy to set the public access setting for the container. 
    BlobContainerPermissions containerPermissions = new BlobContainerPermissions();

    //The public access setting explicitly specifies that the container is private, so that it can't be accessed anonymously.
    containerPermissions.PublicAccess = BlobContainerPublicAccessType.Off;

    //Set the permission policy on the container.
    container.SetPermissions(containerPermissions);

    // Get the shared access signature to share with users, specifying a signature-level access policy.
    string sas = container.GetSharedAccessSignature(new SharedAccessPolicy()
    {
        SharedAccessStartTime = DateTime.Now,
        SharedAccessExpiryTime = DateTime.Now.AddHours(10),
        Permissions = SharedAccessPermissions.Write | SharedAccessPermissions.Read
    });

    //The shared access signature then can be used to create a service client. 
    //This code would likely be run from a different client, but is included here to 
    //demonstrate how to consume the shared access signature.

    //Create the blob client directly, using the shared access signature
    CloudBlobClient sasBlobClient = new CloudBlobClient(storageAccount.BlobEndpoint,
        new StorageCredentialsSharedAccessSignature(sas));

    //Return a reference to a blob.
    CloudBlob blob = sasBlobClient.GetBlobReference("mysascontainer/myblob.txt");

    //Upload text to the blob. If the blob does not yet exist, it will be created. If the blob does exist, its existing
    //content will be overwritten.
    blob.UploadText("Write to a blob using shared access credentials.");
}