Hi,

I wrote some code to email a list of specific chatter groups that do not have full license users in the groups.  It works like a charm.  Then I wanted to get fancy and have the same list show on the visualforce page but what I thought would be a simple addition has had me spinning my wheels for over an hour now.  Any ideas would be appreciated.  Below is the error that I am receiving along with the VF page and the controller.

The error started when I added the datatable tag additon to the VF page and the getUsersChatterGroups method to the controller.  When I comment this line out in the VF page I can save the page and controller.  <apex:outputtext value="{!ug.ChatterGroupName}"/>

Please help!

Error: Unknown property 'CFCT_UsersNotInChatterGroups_Controller.HelperClass.ChatterGroupName'

<apex:page Controller="CFCT_UsersNotInChatterGroups_Controller" action="{!startProcess}">
    <apex:pagemessages escape="false"/>
    <apex:dataTable value="{!UsersChatterGroups}" var="ug" id="theTable" rowClasses="odd,even" styleClass="tableClass">
        <apex:facet name="option">table option</apex:facet>
        <apex:facet name="header">table header</apex:facet>
        <apex:facet name="footer">table footer</apex:facet>
        <apex:column >
            <apex:facet name="header">Chatter Group</apex:facet>
            <apex:facet name="footer">column footer</apex:facet>
            <apex:outputtext value="{!ug.ChatterGroupName}"/>
        </apex:column>
    </apex:dataTable>
</apex:page>

public class CFCT_UsersNotInChatterGroups_Controller {

    private List<User> userList;
    private List<CollaborationGroupMember> chatterGroupList;
    private List<HelperClass> UsersMissingInChatterGroups = new List<HelperClass>();
   
    private Map<id, String> userMap = new Map<id, String>();
    private Map<id, String> ChatterGroupUserMap = new Map<id, String>();
    private String htmlBody = '<table border="1"><tr><th>Chatter Group</th><th>User Name</th></tr>';
    private String plainTextBody = ''; 
        
    public void startProcess() {
         // Get user Information
         userList = [ SELECT id, Name
                      FROM User
                      WHERE isActive = TRUE AND
                            User.Profile.UserLicense.Name = 'Salesforce' ]; 
                                            
        for ( User u : userList ) {
            userMap.put(u.id,u.Name);
        }

        // Build List of Full License Users that do not exist in each Chatter Group
        BuildList('Group1');
        BuildList('Group2');
        BuildList('Group3');
        BuildAndSendEmail();
      
        
        String msg = 'Please check your email inbox for the list of users that need to be added to Chatter Groups.';
        ApexPages.Message myMsg = new ApexPages.Message(ApexPages.Severity.CONFIRM, msg);  
        ApexPages.addMessage(myMsg);     
    }
    
    public List<HelperClass> getUsersChatterGroups() {
        return  UsersMissingInChatterGroups;
    }
    
    // Get Chatter Group List
    // Interate through the User List while building the UsersMissingChatterGroup list
    private void BuildList( String ChatterGroupName ) {           
        chatterGroupList = [ SELECT MemberId, collaborationGroup.Name 
                             FROM CollaborationGroupMember
                             WHERE collaborationGroup.Name = :ChatterGroupName                     
                             ORDER BY collaborationGroup.Name ];                             
        
        for ( CollaborationGroupMember cg : chatterGroupList ) {            
            ChatterGroupUserMap.put(cg.MemberId, cg.collaborationGroup.Name);
        }                
        
        for ( User u : userList) {
            if ( !chatterGroupUserMap.ContainsKey(u.Id) ) {                                                              
                HelperClass UserMissingInChatterGroup = new HelperClass();
                UserMissingInChatterGroup.UserName = u.Name;
                UserMissingInChatterGroup.ChatterGroupName = ChatterGroupName;
                UsersMissingInChatterGroups.add(UserMissingInChatterGroup);
            }            
        }         
    }  
    
    private void BuildAndSendEmail() {
        String priorCGN = '';
        for ( HelperClass hc : UsersMissingInChatterGroups ) {
            if ( priorCGN !='' && priorCGN !=hc.ChatterGroupName ) { 
                htmlBody += '<tr><td align="center">====================</td><td align="center">===========</td></tr>';
            }
            htmlBody += '<tr><td>' + hc.ChatterGroupName + '</td><td>' + hc.UserName + '</td></tr>';
            plainTextBody += hc.ChatterGroupName + '\t' + hc.UserName + '\n';
            priorCGN = hc.ChatterGroupName;
        } 
        htmlBody += '</table>';
        sendEmail();
    }      
    
    private void sendEmail() {
        User currentUser = new User();
        currentUser = QueryBase.getCurrentUser();
        List<String> toAddresses = new List<String> {currentUser.Email};
        String replyToAddress = currentUser.Email;        
        Utils.EmailUtil email = new Utils.EmailUtil(toAddresses);
        email.plainTextBody(plainTextBody);
        email.htmlBody(htmlBody);
        email.senderDisplayName(currentUser.Name);
        email.subject('Users Not In Chatter Groups');
        email.replyTo(replyToAddress);
        email.sendEmail();
    }    
    
           
    // Helper Class
    private class HelperClass {         
        public String UserName;
        public String ChatterGroupName;
    }
}