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CloudBlob.FetchAttributes Method ()

Updated: April 24, 2013

[This topic is part of the Microsoft Azure Storage Client Library 1.7, which has been deprecated. See Storage Client Library for the latest version.]

Populates a blob's properties and metadata.

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

'Usage
Dim instance As CloudBlob

instance.FetchAttributes

public void 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, Windows Server 2008, Windows 8.1, Windows Server 2012 R2, Windows 8 and Windows Server 2012

 

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