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.
Public Shared Sub OpenResourceForPosting(ByVal address As String) Dim client As WebClient = New WebClient() ' Specify that the OpenWriteCallback method gets called ' when the writeable stream is available. AddHandler client.OpenWriteCompleted, AddressOf OpenWriteCallback2 Dim uri as Uri = New Uri(address) client.OpenWriteAsync(uri) ' Applications can perform other tasks ' while waiting for the upload to complete. End Sub
The following method is called when the stream is available.
Private Shared Sub OpenWriteCallback2(ByVal sender As Object, ByVal e As OpenWriteCompletedEventArgs) Dim body As Stream = Nothing Dim s As StreamWriter = Nothing Try body = CType(e.Result, Stream) s = New StreamWriter(body) s.AutoFlush = True s.Write("This is content data to be sent to the server.") Finally If Not s Is Nothing Then s.Close() End If If Not body Is Nothing Then body.Close() End If End Try End Sub
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.


