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Visual Basic 2015 Unleashed
book

Visual Basic 2015 Unleashed

by Alessandro Del Sole
July 2015
Intermediate to advanced content levelIntermediate to advanced
1300 pages
87h 27m
English
Sams
Content preview from Visual Basic 2015 Unleashed

Implementing CRUD Operations

The next step is to implement CRUD operations. For queries, methods in the OData service must match HTTP verbs. Adding a new object through an OData service is done via the POST verb. So you need to replace the PostCustomer method with the following:

<ResponseType(GetType(Customer))>Async Function Post(ByVal customer As Customer) _      As Task(Of IHttpActionResult)    If Not ModelState.IsValid Then        Return BadRequest(ModelState)    End If    db.Customers.Add(customer)    Try        Await db.SaveChangesAsync()    Catch ex As DbUpdateException        If (CustomerExists(customer.CustomerID)) Then            Return Conflict()        Else            Throw        End If    End Try    Return ...

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Publisher Resources

ISBN: 9780134196664Purchase book