ADO.NET Data Services – 1.5 CTP1

 

Finally got a chance to try out this new preview. Here is a snippet that puts a simplified customers list in an atom feed. This was really quick. The only thing I had to do was to update internet explorer because I was using a XP virtual machine :).

   1: namespace DemoServerSite

   2: {

   3:     public class Customer

   4:     {

   5:         public int ID { get; set; }

   6:         public string Name {get;set;}

   7:         public string Code {get;set;}

   8:         public string Street {get;set;}

   9:         public string Country {get;set;}

  10:         public string PostalCode {get;set;}

  11:         public string FiscalId {get;set;}

  12:     }

  13:  

  14:  

  15:     public class CustomersDataContext

  16:     {

  17:         private List<Customer> source;

  18:  

  19:         public CustomersDataContext()

  20:         {

  21:             source = new List<Customer>();

  22:             source.Add(new Customer {ID=0, Name = "Jose", Code = "C0001" });

  23:             source.Add(new Customer {ID =1, Name = "Maria", Code = "C0002" });

  24:         }

  25:  

  26:         public IQueryable<Customer> Customers

  27:         {

  28:             get

  29:             {

  30:                 return this.source.AsQueryable();

  31:             }

  32:         }

  33:     }

  34:  

  35:     public class WebDataService1 : DataService<CustomersDataContext>

  36:     {        

  37:         // This method is called only once to initialize service-wide policies.

  38:         public static void InitializeService(IDataServiceConfiguration2 config)

  39:         {

  40:             // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc.

  41:             // Examples:

  42:             config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);

  43:             config.SetServiceOperationAccessRule("*", ServiceOperationRights.All);

  44:         }

  45:     }

  46: }

This new technology seems to promise because it is really lightweight. Integrates nicely with entity framework and we can tune the behavior by using interceptors. I’ll try to publish some examples of that soon.

Have fun,

Building WCF Custom Channels – A channel project template

 

I am in the process of learning in-depth how to write channels for WCF. One of the hard things was getting an idea of the parts we have to build to achieve this goal.

In this process I built this simple template that contains the major parts and a getting started client/server example to debug it and get it running. If you hit F5 you will get a NotImplementedException and my process is to implement each method as it get called and throws. This seams like a good way of learning how the stack is organized and in what sequence things happen.

This was built by stripping out all the code of the NullTransport project here by Roman Kiss. So all credits go to him :).

Download it here.

Have fun,