OpenWriteCompletedEventArgs Class
Provides data for the OpenWriteCompleted event.
Assembly: System (in System.dll)
System::EventArgs
System.ComponentModel::AsyncCompletedEventArgs
System.Net::OpenWriteCompletedEventArgs
| Name | Description | |
|---|---|---|
![]() | Cancelled | Gets a value indicating whether an asynchronous operation has been canceled.(Inherited from AsyncCompletedEventArgs.) |
![]() | Error | Gets a value indicating which error occurred during an asynchronous operation.(Inherited from AsyncCompletedEventArgs.) |
![]() | Result | Gets a writable stream that is used to send data to a server. |
![]() | UserState | Gets the unique identifier for the asynchronous task.(Inherited from AsyncCompletedEventArgs.) |
| Name | Description | |
|---|---|---|
![]() | Equals(Object^) | Determines whether the specified object is equal to the current object.(Inherited from Object.) |
![]() | Finalize() | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.) |
![]() | GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
![]() | GetType() | |
![]() | MemberwiseClone() | |
![]() | RaiseExceptionIfNecessary() | Raises a user-supplied exception if an asynchronous operation failed.(Inherited from AsyncCompletedEventArgs.) |
![]() | ToString() | Returns a string that represents the current object.(Inherited from Object.) |
Instances of this class are passed to OpenWriteCompletedEventHandler methods.
The following code example demonstrates opening a stream to write data to be uploaded.
void OpenResourceForPosting( String^ address ) { WebClient^ client = gcnew WebClient; Uri ^uri = gcnew Uri(address); // Specify that the OpenWriteCallback method gets called // when the writeable stream is available. client->OpenWriteCompleted += gcnew OpenWriteCompletedEventHandler( OpenWriteCallback2 ); client->OpenWriteAsync( uri ); // Applications can perform other tasks // while waiting for the upload to complete. }
The following method is called when the stream is available.
void OpenWriteCallback2( Object^ /*sender*/, OpenWriteCompletedEventArgs^ e ) { Stream^ body = nullptr; StreamWriter^ s = nullptr; try { body = dynamic_cast<Stream^>(e->Result); s = gcnew StreamWriter( body ); s->AutoFlush = true; s->Write( "This is content data to be sent to the server." ); } finally { if ( s != nullptr ) { s->Close(); } if ( body != nullptr ) { body->Close(); } } }
Available since 2.0
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.


