Storage Client Library for Windows Phone (Version 7.0)

Begins an asynchronous operation to open a stream for writing to the blob.

Namespace:   Microsoft.WindowsAzure.Storage.Blob
Assembly:  Microsoft.WindowsAzure.Storage (in Microsoft.WindowsAzure.Storage.dll)

Syntax

C#

Copy Code

 

[DoesServiceRequestAttribute]
public virtual ICancellableAsyncResult BeginOpenWrite(
	bool createNew,
	AsyncCallback callback,
	object state
)

C++

Copy Code

 

public:
[DoesServiceRequestAttribute]
virtual ICancellableAsyncResult^ BeginOpenWrite(
	bool createNew,
	AsyncCallback^ callback,
	Object^ state
)

F#

Copy Code

 

[<DoesServiceRequestAttribute>]
abstract BeginOpenWrite : 
        createNew:bool *
        callback:AsyncCallback *
        state:Object -> ICancellableAsyncResult
[<DoesServiceRequestAttribute>]
override BeginOpenWrite : 
        createNew:bool *
        callback:AsyncCallback *
        state:Object -> ICancellableAsyncResult

VB

Copy Code

 

<DoesServiceRequestAttribute>
Public Overridable Function BeginOpenWrite (
	createNew As Boolean,
	callback As AsyncCallback,
	state As Object
) As ICancellableAsyncResult

Parameters

createNew

Type: System.BooleanSystem::BooleanSystem.BooleanSystem.Boolean

Use true to create a new append blob or overwrite an existing one, false to append to an existing blob.

callback

Type: System.AsyncCallbackSystem::AsyncCallback^System.AsyncCallbackSystem.AsyncCallback

An AsyncCallback delegate that will receive notification when the asynchronous operation completes.

state

Type: System.ObjectSystem::Object^System.ObjectSystem.Object

A user-defined object that will be passed to the callback delegate.

Return Value

Type: Microsoft.WindowsAzure.Storage.ICancellableAsyncResultMicrosoft.WindowsAzure.Storage::ICancellableAsyncResult^Microsoft.WindowsAzure.Storage.ICancellableAsyncResultMicrosoft.WindowsAzure.Storage.ICancellableAsyncResult

An ICancellableAsyncResult that references the asynchronous operation.

Remarks

Note that this method always makes a call to the BeginFetchAttributes method under the covers. Set the StreamWriteSizeInBytesStreamWriteSizeInBytesStreamWriteSizeInBytesStreamWriteSizeInBytes property before calling this method to specify the block size to write, in bytes, ranging from between 16 KB and 4 MB inclusive.

See Also

BeginOpenWrite Overload
CloudAppendBlob Class
Microsoft.WindowsAzure.Storage.Blob Namespace

Return to top