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IObserver(T).OnError Method

Notifies the observer that the provider has experienced an error condition.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

abstract OnError : 
        error:Exception -> unit

Parameters

error
Type: System.Exception

An object that provides additional information about the error.

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.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

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