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CloudBlob.FetchAttributes Method ()

Updated: April 24, 2013

[This topic is part of the Windows Azure Storage Client Library 1.7, which has been deprecated. The current recommended version is Storage Client Library 3.0.]

Populates a blob's properties and metadata.

Namespace: Microsoft.WindowsAzure.StorageClient
Assembly: Microsoft.WindowsAzure.StorageClient (in Microsoft.WindowsAzure.StorageClient.dll)

'Usage

'Declaration
Public Sub FetchAttributes

The following code example lists blob properties and metadata.


static void ListBlobPropertiesAndMetadata(Uri blobEndpoint, string accountName, string accountKey)
{
    // Create service client for credentialed access to the Blob service.
    CloudBlobClient blobClient = 
        new CloudBlobClient(blobEndpoint, new StorageCredentialsAccountAndKey(accountName, accountKey));

    // Get a reference to a blob.
    CloudBlob blob = blobClient.GetBlobReference("mycontainer/myblob.txt");

    // Populate the blob's attributes.
    blob.FetchAttributes();

    // List some blob properties.
    Console.WriteLine("Blob: " + blob.Attributes.Uri);
    Console.WriteLine();

    Console.WriteLine("Blob properties:");
    Console.WriteLine("\tBlobType: " + blob.Attributes.Properties.BlobType);
    Console.WriteLine("\tLastModifiedUTC: " + blob.Attributes.Properties.LastModifiedUtc);
    Console.WriteLine("\tETag: " + blob.Attributes.Properties.ETag);
    Console.WriteLine();

    // Enumerate the blob's metadata.
    foreach (var metadataKey in blob.Metadata.Keys)
    {
        Console.WriteLine("Metadata name: " + metadataKey.ToString());
        Console.WriteLine("Metadata value: " + blob.Metadata.Get(metadataKey.ToString()));
    }
}

The FetchAttributes method populates the blob's system properties and user-defined metadata. Before reading a blob's properties or metadata, you should always call this method or the BeginFetchAttributes method to retrieve the latest values for the blob's properties and metadata from the service.

In the event of an error, this method will raise a StorageClientException.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Development Platforms

Windows Vista, Windows 7 and Windows Server 2008

Target Platforms

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