Example of Provider interface changes in Q3 2010

[Sudha]

Is there an example showing how to implement the recent provider changes for sending additional information to the provider? I'm working on a custom provider that does NOT use an XML data source and I'm looking mainly at the Implementing A Provider That Supports Multi-valued Resources example, but it is still using the old implementation. I understand what the changes are, but I'm having trouble converting the old "GetResourceTypes" and "GetResourceByType" methods to the new "GetResources" method.

Basically I need help converting the following code to the new "GetResources" implementation. Any help would be greatly appreciated.

public override IEnumerable<ResourceType> GetResourceTypes(RadScheduler owner)
{
  ResourceType[] resourceTypes = new ResourceType[2];
  resourceTypes[0] = new ResourceType("Teacher", false);
  resourceTypes[1] = new ResourceType("Student", true);
  return resourceTypes;
}
public override IEnumerable<Resource> GetResourcesByType(RadScheduler owner, string resourceType)
{
  switch (resourceType)
  {
     case "Teacher" :
         return Teachers.Values;
     case "Student" :
         return Students.Values;
     default:
         throw new InvalidOperationException( "Unknown resource type: " + resourceType);
  }
}
private IDictionary<int, Resource> Teachers
{
   get
   {
       if (_teachers == null)
       {
           _teachers = new Dictionary<int, Resource>();
           foreach (Resource teacher in LoadTeachers())
           {
               _teachers.Add((int)teacher.Key, teacher);
           }
       }
       return _teachers;
   }
}
private IDictionary<int, Resource> Students
{
   get
   {
       _students = new Dictionary<int, Resource>();
       foreach (Resource student in LoadStudents())
       {
           _students.Add((int)student.Key, student);
       }
       return _students;
   }
}
private IEnumerable<Resource> LoadTeachers()
{
  List<Resource> resources = new List<Resource>();
  using (DbConnection conn = OpenConnection())
  {
      DbCommand cmd = DbFactory.CreateCommand();
      cmd.Connection = conn;
      cmd.CommandText = "SELECT [TeacherID], [Name], [Phone] FROM [DbProvider_Teachers]";
      using (DbDataReader reader = cmd.ExecuteReader())
      {
         while (reader.Read())
         {
            Resource res = new Resource();
            res.Type = "Teacher";
            res.Key = reader["TeacherID"];
            res.Text = Convert.ToString(reader[ "Name" ]);
            res.Attributes["Phone"] = Convert.ToString(reader["Phone"]);
            resources.Add(res);
         }
      }
  }
  return resources;
}

private IEnumerable<Resource> LoadStudents()
{
  List<Resource> resources = new List<Resource>();
  using (DbConnection conn = OpenConnection())
  {
      DbCommand cmd = DbFactory.CreateCommand();
      cmd.Connection = conn;
      cmd.CommandText = "SELECT [StudentID], [Name] FROM [DbProvider_Students]";
      using (DbDataReader reader = cmd.ExecuteReader())
      {
          while (reader.Read())
          {
              Resource res = new Resource();
              res.Type = "Student";
              res.Key = reader["StudentID"];
              res.Text = Convert.ToString(reader[ "Name" ]);
              resources.Add(res);
          }
      }
  }
  return resources;
}

[Peter]

Hello Josh,

The GetResources method could look like this:

public override IDictionary<ResourceType, IEnumerable<Resource>> GetResources(ISchedulerInfo schedulerInfo)
   {
       Dictionary<ResourceType, IEnumerable<Resource>> resCollection = new Dictionary<ResourceType, IEnumerable<Resource>>();
       resCollection.Add(new ResourceType("Teacher", false), Teachers.Values);
       resCollection.Add(new ResourceType("Student", true), Students.Values);
       return resCollection;
   }

Attached is a sample for reference.


Greetings,
Peter
the Telerik team