CloudAppendBlob.BeginOpenWrite Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Overloads
| BeginOpenWrite(Boolean, AccessCondition, BlobRequestOptions, OperationContext, AsyncCallback, Object) |
Begins an asynchronous operation to open a stream for writing to the blob. |
| BeginOpenWrite(Boolean, AsyncCallback, Object) |
Begins an asynchronous operation to open a stream for writing to the blob. |
BeginOpenWrite(Boolean, AccessCondition, BlobRequestOptions, OperationContext, AsyncCallback, Object)
Begins an asynchronous operation to open a stream for writing to the blob.
[Microsoft.Azure.Storage.DoesServiceRequest]
public virtual Microsoft.Azure.Storage.ICancellableAsyncResult BeginOpenWrite (bool createNew, Microsoft.Azure.Storage.AccessCondition accessCondition, Microsoft.Azure.Storage.Blob.BlobRequestOptions options, Microsoft.Azure.Storage.OperationContext operationContext, AsyncCallback callback, object state);[<Microsoft.Azure.Storage.DoesServiceRequest>]
abstract member BeginOpenWrite : bool * Microsoft.Azure.Storage.AccessCondition * Microsoft.Azure.Storage.Blob.BlobRequestOptions * Microsoft.Azure.Storage.OperationContext * AsyncCallback * obj -> Microsoft.Azure.Storage.ICancellableAsyncResult
override this.BeginOpenWrite : bool * Microsoft.Azure.Storage.AccessCondition * Microsoft.Azure.Storage.Blob.BlobRequestOptions * Microsoft.Azure.Storage.OperationContext * AsyncCallback * obj -> Microsoft.Azure.Storage.ICancellableAsyncResultPublic Overridable Function BeginOpenWrite (createNew As Boolean, accessCondition As AccessCondition, options As BlobRequestOptions, operationContext As OperationContext, callback As AsyncCallback, state As Object) As ICancellableAsyncResultParameters
- createNew
- Boolean
Use true to create a new append blob or overwrite an existing one, false to append to an existing blob.
- accessCondition
- AccessCondition
An AccessCondition object that represents the condition that must be met in order for the request to proceed. If null, no condition is used.
- options
- BlobRequestOptions
A BlobRequestOptions object that specifies additional options for the request.
- operationContext
- OperationContext
An OperationContext object that represents the context for the current operation.
- callback
- AsyncCallback
An AsyncCallback delegate that will receive notification when the asynchronous operation completes.
- state
- Object
A user-defined object that will be passed to the callback delegate.
Returns
An ICancellableAsyncResult that references the asynchronous operation.
- Attributes
Remarks
Note that this method always makes a call to the BeginFetchAttributes(AccessCondition, BlobRequestOptions, OperationContext, AsyncCallback, Object) method under the covers. Set the StreamWriteSizeInBytes property before calling this method to specify the block size to write, in bytes, ranging from between 16 KB and 4 MB inclusive. If you have a single-writer scenario, see AbsorbConditionalErrorsOnRetry to determine whether setting this flag to true is acceptable for your scenario.
Applies to
BeginOpenWrite(Boolean, AsyncCallback, Object)
Begins an asynchronous operation to open a stream for writing to the blob.
[Microsoft.Azure.Storage.DoesServiceRequest]
public virtual Microsoft.Azure.Storage.ICancellableAsyncResult BeginOpenWrite (bool createNew, AsyncCallback callback, object state);[<Microsoft.Azure.Storage.DoesServiceRequest>]
abstract member BeginOpenWrite : bool * AsyncCallback * obj -> Microsoft.Azure.Storage.ICancellableAsyncResult
override this.BeginOpenWrite : bool * AsyncCallback * obj -> Microsoft.Azure.Storage.ICancellableAsyncResultPublic Overridable Function BeginOpenWrite (createNew As Boolean, callback As AsyncCallback, state As Object) As ICancellableAsyncResultParameters
- createNew
- Boolean
Use true to create a new append blob or overwrite an existing one, false to append to an existing blob.
- callback
- AsyncCallback
An AsyncCallback delegate that will receive notification when the asynchronous operation completes.
- state
- Object
A user-defined object that will be passed to the callback delegate.
Returns
An ICancellableAsyncResult that references the asynchronous operation.
- Attributes
Remarks
Note that this method always makes a call to the BeginFetchAttributes(AccessCondition, BlobRequestOptions, OperationContext, AsyncCallback, Object) method under the covers. Set the StreamWriteSizeInBytes property before calling this method to specify the block size to write, in bytes, ranging from between 16 KB and 4 MB inclusive.
