【OData】Odata能做什么？

在我看来OData就是一个实现Rest full的框架。你可以使用它对server的资源进行操作。那么它能做什么？

1. 获取资源

var context = new DefaultContainer(new Uri("https://services.odata.org/v4/TripPinServiceRW/"));
var people = context.People.Execute();

2.获取特定的资源

var context = new DefaultContainer(new Uri("https://services.odata.org/v4/(S(34wtn2c0hkuk5ekg0pjr513b))/TripPinServiceRW/"));
var person = context.People.ByKey(userName: "russellwhyte").GetValue();

3.查询

var context = new DefaultContainer(new Uri("https://services.odata.org/v4/(S(34wtn2c0hkuk5ekg0pjr513b))/TripPinServiceRW/"));
var people = context.People.Where(c => c.Trips.Any(d => d.Budget > 3000)).Take(2).Select(c => new {c.FirstName, c.LastName});

4.创建资源

var context = new DefaultContainer(new Uri("https://services.odata.org/v4/(S(34wtn2c0hkuk5ekg0pjr513b))/TripPinServiceRW/"));
var lewis = new Person()
{
    UserName = "lewisblack",
    FirstName = "Lewis",
    LastName = "Black",
    Emails = new ObservableCollection<string>() {"lewisblack@example.com"},
    AddressInfo =
        new ObservableCollection<Location>()
        {
            new Location()
            {
Address = "187 Suffolk Ln.",
City = new City() {CountryRegion = "United States", Name = "Boise", Region = "ID"}
            }
        },
    Gender = PersonGender.Male,
    Concurrency = 635519729375200400
};
context.AddObject("People", lewis);
context.SaveChanges();

5.关联资源

var context = new DefaultContainer(new Uri("https://services.odata.org/v4/(S(34wtn2c0hkuk5ekg0pjr513b))/TripPinServiceRW/"));
var trip = context.People.ByKey(userName: "russellwhyte").Trips.ByKey(tripId: 0).GetValue();
var dsc = new DataServiceCollection<Person>(context)
{
    context.People.ByKey(userName: "lewisblack").GetValue()
};
dsc[0].Trips.Add(trip);</p>
<p>context.SaveChanges();

6.调用函数

In RESTful APIs, there can be some custom operations that contain complicated logic and can be frequently used. For that purpose, OData supports defining functions and actions to represent such operations. They are also resources themselves and can be bound to existing resources.

var context = new DefaultContainer(new
Uri("https://services.odata.org/v4/(S(34wtn2c0hkuk5ekg0pjr513b))/TripPinServiceRW/"));
var trip = context.People.ByKey(userName: "russellwhyte").Trips.ByKey(tripId: 0).GetValue();
var people = trip.GetInvolvedPeople().Execute();