IWMSEventNotificationPlugin.OnEvent (C#)
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IWMSEventNotificationPlugin.OnEvent (C#)
The server calls the OnEvent method when an event subscribed to by the plug-in occurs.
Syntax
void
Parameters
pEvent
[in] Reference to a WMS_EVENT structure containing the event.
pUserCtx
[in] IWMSContext object containing the user context.
pPresentationCtx
[in] IWMSContext object containing the presentation context.
pCommandCtx
[in] IWMSCommandContext object containing the command context.
Return Values
This method does not return a value. To report an error, the plug-in can throw a COMException object to the server. If the plug-in uses the IWMSEventLog object to log error information, it is recommended that it throw NS_E_PLUGIN_ERROR_REPORTED (0xC00D157D). Typically, the server attempts to make plug-in error information available to the server object model, the Windows Event Viewer, and the troubleshooting list in the details pane of the Windows Media Services MMC. However, if the plug-in uses the IWMSEventLog object to send custom error information to the Windows Event Viewer, throwing NS_E_PLUGIN_ERROR_REPORTED stops the server from also logging to the event viewer. For more information about plug-in error information, see Identifying Plug-in Errors.
Example Code
public void OnEvent( ref WMS_EVENT pEvent, IWMSContext pUserCtx, IWMSContext pPresentationCtx, IWMSCommandContext pCommandCtx) { IWMSContext CmdRequest; int iSubEvent; try { pCommandCtx.GetCommandRequest(out CmdRequest); CmdRequest.GetLongValue(WMSDefines.WMS_COMMAND_CONTEXT_EVENT, WMSDefines.WMS_COMMAND_CONTEXT_EVENT_ID, out iSubEvent, 0); switch( pEvent.Type ) { case WMS_EVENT_TYPE.WMS_EVENT_PLUGIN: // TODO: Handle plug-in events. break; case WMS_EVENT_TYPE.WMS_EVENT_PUBLISHING_POINT: // TODO: Handle publishing point events. break; case WMS_EVENT_TYPE.WMS_EVENT_SERVER: // TODO: Handle server events. break; case WMS_EVENT_TYPE.WMS_EVENT_LIMIT_CHANGE: int iOldValue; int iNewValue; CmdRequest.GetLongValue( WMSDefines.WMS_COMMAND_CONTEXT_LIMIT_OLD_VALUE, WMSDefines.WMS_COMMAND_CONTEXT_LIMIT_OLD_VALUE_ID, out iOldValue, 0); CmdRequest.GetLongValue( WMSDefines.WMS_COMMAND_CONTEXT_LIMIT_NEW_VALUE, WMSDefines.WMS_COMMAND_CONTEXT_LIMIT_NEW_VALUE_ID, out iNewValue, 0); if( iSubEvent == (int)WMS_LIMIT_CHANGE_EVENT_TYPE.WMS_EVENT_LIMIT_CHANGE_CONNECTED_PLAYERS ) // TODO: Handle connected players limit change event. else if( iSubEvent == (int)WMS_LIMIT_CHANGE_EVENT_TYPE.WMS_EVENT_LIMIT_CHANGE_CONNECTION_RATE ) // TODO: Handle connection rate limit change event. else // TODO: Handle other limit change events. break; } } catch( Exception e ) { // TODO: Handle exceptions. } }
Requirements
Reference: Add a reference to Microsoft.WindowsMediaServices.
Namespace: Microsoft.WindowsMediaServices.Interop.
Assembly: Microsoft.WindowsMediaServices.dll.
Library: WMSServerTypeLib.dll.
Platform: Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition; Windows Server 2008.
See Also
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