To handle a System Center 2012 Configuration Manager error that is raised during an asynchronous query, you test the RunWorkerCompletedEventArgs parameter Error Exception property that is passed to the QueryProcessorCompleted event handler. If Error is not null, an exception has occurred and you use Error to discover the cause.

If Error is an SmsQueryException, you can use it to get to the underlying __ExtendedException or SMS_ExtendedException. Because the managed SMS Provider library does not wrap these exceptions you will need to use the System.Management namespace ManagementException object to access them.

To handle an asynchronous query error

  1. Create an asynchronous query.

  2. In the asynchronous query QueryProcessorCompleted event handler, implement the code in the following example.

  3. Run the asynchronous query. To test the exception handler, pass a badly formed query string such as Select & from &&& to the ProcessQuery method.

Example

The following example implements a QueryProcessorCompleted event handler.

For information about calling the sample code, see Calling Configuration Manager Code Snippets.

C#  Copy Code
void bw1_QueryProcessorCompleted(object sender, RunWorkerCompletedEventArgs e)
{
	if (e.Error != null)
	{
		Console.WriteLine("There was an Error");
		if (e.Error is SmsQueryException)
		{
			SmsQueryException queryException = (SmsQueryException)e.Error;
			Console.WriteLine(queryException.Message);
		
			// Get either the __ExtendedStatus or SMS_ExtendedStatus object and display various properties.
			ManagementException mgmtExcept = queryException.InnerException as ManagementException;

			if (mgmtExcept != null)
			{
				if (string.Equals(mgmtExcept.ErrorInformation.ClassPath.ToString(), "SMS_ExtendedStatus", StringComparison.OrdinalIgnoreCase) == true)
				{
					Console.WriteLine("Configuration Manager provider exception");
			}

				else if (string.Equals(mgmtExcept.ErrorInformation.ClassPath.ToString(), "__ExtendedStatus", StringComparison.OrdinalIgnoreCase) == true)
				{
					Console.WriteLine("WMI exception");
			}
				Console.WriteLine(mgmtExcept.ErrorCode.ToString());
				Console.WriteLine(mgmtExcept.ErrorInformation["ParameterInfo"].ToString());
				Console.WriteLine(mgmtExcept.ErrorInformation["Operation"].ToString());
				Console.WriteLine(mgmtExcept.ErrorInformation["ProviderName"].ToString());
		}
	 
	}
		if (e.Error is SmsConnectionException)
		{
			Console.WriteLine("There was a connection error :" + ((SmsConnectionException)e.Error).Message);
			Console.WriteLine(((SmsConnectionException)e.Error).ErrorCode);
	}
}


	Console.WriteLine("Done...");
}

The example method has the following parameters:

Parameter Type Description

sender

  • Object

The source of the event.

e

  • RunWorkerCompletedEventArgs

The event data.

For more information, see (RunWorkerCompletedEventArgs Class).

Compiling the Code

This C# example requires:

Namespaces

System

System.Collections.Generic

System.Text

Microsoft.ConfigurationManagement.ManagementProvider

Microsoft.ConfigurationManagement.ManagementProvider.WqlQueryEngine

System.Management

System.ComponentModel

Assembly

microsoft.configurationmanagement.managementprovider

adminui.wqlqueryengine

System.Management

Robust Programming

For more information about error handling, see About Configuration Manager Errors.

See Also