/// <summary>
        /// Get Document Types for Import Document
        /// </summary>
        /// <param name="logonId"></param>
        /// <param name="criteria"></param>
        /// <param name="collectionRequest"></param>
        /// <returns></returns>
        public DocumentTypeReturnValue GetDocumentTypes(Guid logonId, DocumentTypeSearchCriteria criteria, CollectionRequest collectionRequest)
        {
            DocumentTypeReturnValue returnValue = new DocumentTypeReturnValue();

            try
            {
                // Get the logged on user from the current logons and add their
                // ApplicationSettings the list of concurrent sessions.
                Host.LoadLoggedOnUser(logonId);

                try
                {
                    Functions.RestrictRekoopIntegrationUser(UserInformation.Instance.DbUid);
                    switch (UserInformation.Instance.UserType)
                    {
                        case DataConstants.UserType.Staff:
                            // Can do everything
                            break;
                        case DataConstants.UserType.Client:
                        case DataConstants.UserType.ThirdParty:
                            throw new Exception("Access denied");
                        default:
                            throw new Exception("Access denied");
                    }

                    // Create a data list creator for a list of matters
                    DataListCreator<DocumentTypeSearchItem> dataListCreator = new DataListCreator<DocumentTypeSearchItem>();

                    // Declare an inline event (annonymous delegate) to read the
                    // dataset if it is required
                    dataListCreator.ReadDataSet += delegate(object sender, ReadDataSetEventArgs e)
                    {
                        e.DataSet = SrvDocumentLookup.GetDocumentTypes(criteria.DocTypeIDs);
                    };

                    // Create the data list
                    returnValue.DocumentType = dataListCreator.Create(logonId,
                        // Give the query a name so it can be cached
                        "DocumentTypeSearch",
                        // Tell it the query criteria used so if the cache is accessed
                        // again it knows if it is the same query
                        criteria.ToString(),
                        collectionRequest,
                        // Import mappings to map the dataset row fields to the data
                        // list entity properties
                        new ImportMapping[] {
                            new ImportMapping("Id", "DocTypeID"),
                            new ImportMapping("Description", "DocTypeDescription")
                            }
                        );
                }
                finally
                {
                    // Remove the logged on user's ApplicationSettings from the
                    // list of concurrent sessions
                    Host.UnloadLoggedOnUser();
                }
            }
            catch (System.Data.SqlClient.SqlException)
            {
                returnValue.Success = false;
                returnValue.Message = Functions.SQLErrorMessage;
            }
            catch (Exception ex)
            {
                returnValue.Success = false;
                returnValue.Message = ex.Message;
            }

            return returnValue;
        }