Databases
StackOverflow2013
Postsdbo
POSilverlight Domain Service - How to have a single [Invoke] operation
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POSilverlight Domain Service - How to have a single [Invoke] operation
    primarykey
    data
    text
    <p>I have a custom domain service with a single [Invoke] operation that returns a List of User objects. </p> <p>In order to get it to compile, I have to stump out the User object in a property (highlighted as 'DONOTUSE' below) or method outside of the [Invoke] operation otherwise I am met with the following compile time error:</p> <blockquote> <p>Operation named 'GetUsers' does not conform to the required signature. Return types must be an entity or complex type, a collection of entities or complex types, or one of the predefined serializable types.</p> </blockquote> <p>Once I stump out the property it compiles and executes as intended, but the hack annoys the heck out of me.</p> <p>I do <strong>not</strong> wish to use the [Query] attribute so please do not suggest that I do. I say this because if I do switch to [Query] it compiles fine, however, I do not want to deal with the EntityQuery result set or its deferred execution.</p> <p>Due to the way I have the designed the architecture, the needs of the use case in this example and MSDN documentation, [Invoke] is the most appropriate means.</p> <pre><code>[EnableClientAccess()] public class UserDomainService : DomainService { private IUserService userService; public UserDomainService(IUserService service) { userService = service; } [Invoke, RequiresAuthentication] public List&lt;User&gt; GetUsers() { return userService.GetUsers(); } //HOW CAN I REMOVE THE FOLLOWING AND STILL COMPILE? public User DONOTUSE() { return null; } } </code></pre> <p>I'll leave you with this... I have another project that has custom DomainServices with single [Invoke] operations and <em>it</em> compiles fine. I cannot, for the life of me, figure out why one would compile over the other.</p> <p><strong>UPDATE</strong></p> <p>See comments in the selected answer below.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USJ.C.
    1. USJ.C.
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POSilverlight Domain Service - How to have a single [Invoke] operation
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POSilverlight Domain Service - How to have a single [Invoke] operation
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POSilverlight Domain Service - How to have a single [Invoke] operation
      1. USRadek Stromský
      1. VTFavorite
    1. CODoes your domain service that compiles return an entity datatype, or a simple datatype like string or List<string>?
      singulars
      1. POSilverlight Domain Service - How to have a single [Invoke] operation
      1. USNoel
    2. CODo you have a [Key] on your User object? If not this may be the problem. When RIA generates the client-side proxy it needs a field marked [Key] in order to uniquely identify instances. Also, what is User a subclass of? If it uses a namespace that is not supported by Silverlight that could also be a problem
      singulars
      1. POSilverlight Domain Service - How to have a single [Invoke] operation
      1. USKeith Adler
    3. CO@Noel: No it does not - very similar to the above except no service DI. @Nissan Fan: User is a POCO object and it does have a [Key] attribute on it.
      singulars
      1. POSilverlight Domain Service - How to have a single [Invoke] operation
      1. USJ.C.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload