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CloudBlob.UploadText Method (String, Encoding, BlobRequestOptions)

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.]

Uploads a string of text to a block blob, with the specified encoding, and using a conditional request based on the BlobRequestOptions that you specify.

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

'用途
Dim instance As CloudBlob
Dim content As String
Dim encoding As Encoding
Dim options As BlobRequestOptions

instance.UploadText(content, encoding, options)

public:
virtual void UploadText (
	String^ content, 
	Encoding^ encoding, 
	BlobRequestOptions^ options
)

Parameters

content

Type: System.String

The text to upload.

encoding

Type: System.Text.Encoding

An object that indicates the text encoding to use.

options

Type: Microsoft.WindowsAzure.StorageClient.BlobRequestOptions

An object that specifies any additional options for the request.

The following code example writes to a blob using two different service clients.

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

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

    // Specify the if-none-match condition.
    BlobRequestOptions options = new BlobRequestOptions();

    options.AccessCondition = AccessCondition.IfNoneMatch("*");

    try
    {
        // Upload the blob only if it does not already exist.
        blob.UploadText("Upload this blob if it does not already exist.", Encoding.UTF8, options);
    }
    catch (StorageClientException e)
    {
        if (e.ErrorCode == StorageErrorCode.BlobAlreadyExists)
        {
            Console.WriteLine("Blob was not uploaded because it already exists.");
        }
        else
        {
            Console.WriteLine(e.Message);
        }
    }
}

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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