How to Handle Configuration Manager Synchronous Errors by Using Managed Code

發行項
05/03/2011

Applies To: System Center Configuration Manager 2007, System Center Configuration Manager 2007 R2, System Center Configuration Manager 2007 R3, System Center Configuration Manager 2007 SP1, System Center Configuration Manager 2007 SP2

To handle a Microsoft System Center Configuration Manager 2007 error that is raised in a synchronous query, you catch the SMSQueryException exception. Because this exception is also caught by SMS_Exception, you can catch it and the SmsConnection exception in the same catch block.

If the exception that is caught in an SMS_Exception 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.

Note

For clarity, most examples in this documentation simply re-throw exceptions. You can replace them with the following example if you want more informative exception information.

To handle a synchronous query error

Write code to access the SMS Provider For more information, see How to Use Configuration Manager Objects with Managed Code.
Use the following example code to catch the SMSQueryException and SMSConnectionException exceptions.

Example

The following C# example function attempts to open a nonexistent SMS_Package package. In the exception handler, the code determines what type of error has been raised and displays its information.

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

public void ExerciseException(WqlConnectionManager connection)
{
    try
    {

        IResultObject package = connection.GetInstance(@"SMS_Package.PackageID='UNKNOWN'");
        Console.WriteLine("Package Name: " + package["Name"].StringValue);
        Console.WriteLine("Package Description: " + package["Description"].StringValue);

    }
    catch (SmsException e)
    {
        if (e is SmsQueryException)
        {
            SmsQueryException queryException = (SmsQueryException)e;
            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 is SmsConnectionException)
        {
            Console.WriteLine("There was a connection error :" + ((SmsConnectionException)e).Message);
            Console.WriteLine(((SmsConnectionException)e).ErrorCode);
        }
    }
}

The example method has the following parameters:

Parameter	Type	Description
connection	WqlConnectionManager	A valid connection to the provider. For more information, see How to Connect to an SMS Provider in Configuration Manager by Using Managed Code

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.

Security

For more information about securing Configuration Manager applications, see About Securing Configuration Manager Applications.

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