IObserver<T>.OnError Method

Although error is an object that is derived from System.Exception, it does not necessarily represent an exception that is thrown by the provider. It can also represent a routine or expected error condition, such as data that is missing or unavailable. The OnError method should be seen as informational, and the provider should not expect the observer to provide error handling.

The following example provides an implementation of the OnError method in a latitude/longitude tracking application. The method simply reports that data is currently unavailable; it does not make use of the Exception object passed to it as a parameter. See the Example section of the IObserver<T> topic for the complete example.

public virtual void OnError(Exception e)
{
   Console.WriteLine("{0}: The location cannot be determined.", this.Name);
}

.NET Framework

.NET Framework Client Profile

Portable Class Library

.NET for Windows Store apps

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

Other Resources