You enumerate an operating system deployment task sequence, in System Center 2012 R2 Configuration Manager, by using a recursive method to scan through the task sequence steps and groups.

To enumerate the steps in a task sequence

  1. Set up a connection to the SMS Provider. For more information, see About the SMS Provider in Configuration Manager.

  2. Obtain a valid task sequence SMS_TaskSequence object. For more information, see How to Create an Operating System Deployment Task Sequence

  3. Enumerate through the steps to display any action (SMS_TaskSequence_Actions names. Use recursion to access any groups (SMS_TaskSequence_Group) that are found and display their actions.

Example

The following example displays the actions and groups within a task sequence.

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

Visual Basic Script  Copy Code
Sub RecurseTaskSequenceSteps(taskSequence, indent)

	Dim osdStep 
	Dim i
	
	' Indent each new group.
	for each osdStep in taskSequence.Steps

		for i=0 to indent
			WScript.StdOut.Write " "
		next
	
		If osdStep.SystemProperties_("__CLASS")="SMS_TaskSequence_Group" Then
			wscript.StdOut.Write "Group: " 
		End If
	
		WScript.Echo osdStep.Name

		' Recurse into each group found.
		If osdStep.SystemProperties_("__CLASS")="SMS_TaskSequence_Group" Then
			If IsNull(osdStep.Steps) Then
				Wscript.Echo "No steps"
			Else
				Call RecurseTaskSequenceSteps (osdStep, indent+3)
			End If
		End If
	 Next   
End Sub	
C#  Copy Code
public void RecurseTaskSequenceSteps(
	IResultObject taskSequence,
	int indent)
{
	try
	{
		// The array of SMS_TaskSequence_Steps.
		List<IResultObject> steps = taskSequence.GetArrayItems("Steps");

		foreach (IResultObject ro in steps)
		{
			for (int i = 0; i < indent; i++)
			{
				Console.Write(" ");
		}

			if (ro["__CLASS"].StringValue == "SMS_TaskSequence_Group")
			{
				Console.Write("Group: ");
		}

			Console.WriteLine(ro["Name"].StringValue);

			// Child groups that are found. Use recursion to view them.
			if (ro["__CLASS"].StringValue == "SMS_TaskSequence_Group")
			{
				this.RecurseTaskSequenceSteps(ro, indent + 3);
		}
	}
}
	catch (SmsException e)
	{
		Console.WriteLine("Failed To enumerate task sequence items: " + e.Message);
		throw;
}
}

The example method has the following parameters:

Parameter Type Description

taskSequence

  • Managed: IResultObject

  • VBScript: SWbemObject

A valid task sequence (SMS_TaskSequence). The group is added to this task sequence.

indent

  • Managed: Integer

  • VBScript: Integer

Indent is used to space console output for child groups.

Compiling the Code

This C# example requires:

Namespaces

System

System.Collections.Generic

System.Text

Microsoft.ConfigurationManagement.ManagementProvider

Microsoft.ConfigurationManagement.ManagementProvider.WqlQueryEngine

Assembly

microsoft.configurationmanagement.managementprovider

adminui.wqlqueryengine

Robust Programming

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

Security

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

See Also