Provides data for the OpenReadCompleted event.
Assembly: System (in System.dll)
Gets a value indicating whether an asynchronous operation has been canceled.(Inherited from AsyncCompletedEventArgs.)
Gets a value indicating which error occurred during an asynchronous operation.(Inherited from AsyncCompletedEventArgs.)
Gets a readable stream that contains data downloaded by a DownloadDataAsync method.
Gets the unique identifier for the asynchronous task.(Inherited from AsyncCompletedEventArgs.)
Determines whether the specified object is equal to the current object.(Inherited from Object.)
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)
Serves as the default hash function. (Inherited from Object.)
Raises a user-supplied exception if an asynchronous operation failed.(Inherited from AsyncCompletedEventArgs.)
Returns a string that represents the current object.(Inherited from Object.)
Legacy Code Example
The following code example demonstrates downloading a resource for reading.
Public Shared Sub OpenResourceForReading2(ByVal address As String) Dim client As WebClient = New WebClient() AddHandler client.OpenReadCompleted, AddressOf OpenReadCallback2 Dim uri as Uri = New Uri(address) client.OpenReadAsync(uri) End Sub
The following method is called when the download completes.
Private Shared Sub OpenReadCallback2(ByVal sender As Object, ByVal e As OpenReadCompletedEventArgs) Dim reply As Stream = Nothing Dim s As StreamReader = Nothing Try reply = CType(e.Result, Stream) s = New StreamReader(reply) Console.WriteLine(s.ReadToEnd()) Finally If Not s Is Nothing Then s.Close() End If If Not reply Is Nothing Then reply.Close() End If End Try End Sub
Available since 2.0
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.