WCF Service and WebViewer Addin Assemblies

The source code for the medical web viewer is included with the installation.

The default location for the project file is here:

• C:\LEADTOOLS 19\Examples\PACSFramework\MedicalWebViewer 

The Medical Web Viewer consists of eight assemblies with source code. 

For the tutorial, you will modify and recompile two of the assemblies:

• Leadtools.Medical.WebViewer.WCF Implements the following web services:

  • class AuthenticationService : IAuthenticationService
  • class ObjectQueryService : IObjectQueryService
  • class ObjectRetrieveService : IObjectRetrieveService
  • class PacsQueryService : IPACSQueryService
  • class PACSRetrieveService : IPACSRetrieveService
  • class PatientAccessRightsService : IPatientAccessRightsService
  • class StoreService : IStoreService

• Leadtools.Medical.WebViewer.Addins Implements the following addins:

  • class AuthenticationAddin : IAuthenticationAddin
  • class DatabaseQueryAddin : IQueryAddin
  • class DownloadAddin : IPacsDownloadAddin
  • class ObjectRetrieveAddin : IObjectRetrieveAddin
  • class PACSQueryAddin : IPACSQueryAddin
  • class PatientAccessRightsAddin : IPatientAccessRightsAddin
  • class StoreAddin : IStoreAddin

The web services in Leadtools.Medical.WebViewer.WCF assembly each make use of more of the addins in the Leadtools.Medical.WebViewer.Addins assembly.  The addins read the database (using a data access layer) to achieve a specific task, like authenticate a user or retrieve information about a DICOM object. The table below lists each web service, its function, and the addins it uses: 

Each web service uses the AddinsFactory class to create any of the addins that it requires.  The AddinsFactory constructor calls a RegisterInterfaces() method as part of its initialization.  The default implementation of RegisterInterfaces() does nothing. 

For the HTML5 Medical Web Viewer to use a custom database, you must add code to RegisterInterfaces() to register the necessary components, including:

• Register the MyStorageSqlDbDataAccessAgent and MyStorageDataAccessConfigurationView classes used for accessing the custom database

• Register the _MyPatientInfo_, _MyStudyInfo_, _MySeriesInfo_, and MyInstanceInfo classes that are used for extracting DICOM data from a _System.Data.DataRow_. 

• Register ICatalogEntity classes (_MyPatient_, _MyStudy_, _MySeries_, and _MyInstance_) which are used with the MatchingParameterCollection to generate the WHERE statement of the database query. 

• For a detailed discussion of classes, see the LEAD Medical Storage Server Custom Database tutorial. 

• The RegisterInterfaces() method has the following implementation for this tutorial:

   public static void RegisterInterfaces() 
   { 
      if (!DataAccessServiceLocator.IsRegistered<IPatientInfo>()) 
      { 
         DataAccessServiceLocator.Register<IPatientInfo>(new MyPatientInfo()); 
      } 
 
      if (!DataAccessServiceLocator.IsRegistered<IStudyInfo>()) 
      { 
         DataAccessServiceLocator.Register<IStudyInfo>(new MyStudyInfo()); 
      } 
 
      if (!DataAccessServiceLocator.IsRegistered<ISeriesInfo>()) 
      { 
         DataAccessServiceLocator.Register<ISeriesInfo>(new MySeriesInfo()); 
      } 
 
      if (!DataAccessServiceLocator.IsRegistered<IInstanceInfo>()) 
      { 
         DataAccessServiceLocator.Register<IInstanceInfo>(new MyInstanceInfo()); 
      } 
 
      if (!DataAccessServices.IsDataAccessServiceRegistered<IStorageDataAccessAgent>()) 
      { 
         System.Configuration.Configuration configuration = ServiceUtils.GetGlobalPacsConfig(); 
 
         IStorageDataAccessAgent storageDataAccess = DataAccessFactory.GetInstance( 
            new MyStorageDataAccessConfigurationView( 
               configuration, 
               ServiceUtils.ProductNameStorageServer, null)) 
            .CreateDataAccessAgent<IStorageDataAccessAgent>(); 
 
         DataAccessServices.RegisterDataAccessService<IStorageDataAccessAgent>(storageDataAccess); 
      } 
 
 
      RegisteredEntities.AddItem(RegisteredEntities.PatientEntityName, typeof(MyPatient)); 
      RegisteredEntities.AddItem(RegisteredEntities.StudyEntityName, typeof(MyStudy)); 
      RegisteredEntities.AddItem(RegisteredEntities.SeriesEntityName, typeof(MySeries)); 
      RegisteredEntities.AddItem(RegisteredEntities.InstanceEntityName, typeof(MyInstance)); 
   }