[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.]
Ends an asynchronous operation to copy a blob's contents, properties, and metadata to a new blob.
Namespace: Microsoft.WindowsAzure.StorageClient
Assembly: Microsoft.WindowsAzure.StorageClient (in Microsoft.WindowsAzure.StorageClient.dll)
Usage
| Visual Basic |
|---|
Dim instance As CloudBlob
Dim asyncResult As IAsyncResult
instance.EndCopyFromBlob(asyncResult) |
Syntax
| Visual Basic |
|---|
Public Sub EndCopyFromBlob ( _
asyncResult As IAsyncResult _
) |
| C# |
|---|
public void EndCopyFromBlob (
IAsyncResult asyncResult
) |
| C++ |
|---|
public:
void EndCopyFromBlob (
IAsyncResult^ asyncResult
) |
Parameters
- asyncResult
Type: System.IAsyncResult
An IAsyncResult that references the pending asynchronous operation.
Example
The following code example copies a blob only if an access condition on the source blob is met.
| C# |  Copy Code |
|---|
static void CopyBlobConditionallyAsync(Uri blobEndpoint, string accountName, string accountKey)
{
// Create service client for credentialed access to the Blob service.
CloudBlobClient blobClient = new CloudBlobClient(blobEndpoint, accountName, accountKey);
// Create a new blob by uploading a file.
CloudBlob sourceBlob = blobClient.GetBlobReference("mycontainer/sourceblob.txt");
sourceBlob.UploadFile("C:\\somefile.txt");
// Get a reference to the destination blob.
CloudBlob destBlob = blobClient.GetBlobReference("mycontainer/destblob.txt");
// Establish an access condition, so that the blob will be copied if the source blob
// has not been changed in the past hour.
BlobRequestOptions options = new BlobRequestOptions();
options.CopySourceAccessCondition = AccessCondition.IfNotModifiedSince(DateTime.Now.AddHours(-1));
destBlob.BeginCopyFromBlob(sourceBlob, options, CopyBlobCallback, destBlob);
}
static void CopyBlobCallback(IAsyncResult result)
{
CloudBlob blobDest = (CloudBlob)result.AsyncState;
// End the operation, checking for the exception that indicates the condition was not met.
try
{
blobDest.EndCopyFromBlob(result);
}
catch (StorageClientException e)
{
if (e.StatusCode == HttpStatusCode.PreconditionFailed)
{
Console.WriteLine("Access condition on source blob not met for blob copy operation.");
}
else
{
Console.WriteLine("Error code: " + e.ErrorCode);
}
}
}
|
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Platforms
Change History
See Also
