Silverlight 2 - Simple Editing of Web Service Data in a DataGrid

核心提示：Somebody asked how you use the DataGrid in Silverlight 2 in order to load data from a web service, modify it and submit it back so I thought I'd spend 5 min

Somebody asked how you use the DataGrid in Silverlight 2 in order to load data from a web service, modify it and submit it back so I thought I'd spend 5 minutes experimenting with that.

I wrote a very simple web service with WCF;

[DataContract]
public class Person
{
　[DataMember]
　public int Id { get; set; }
　[DataMember]
　public string FirstName { get; set; }
　[DataMember]
　public string LastName { get; set; }
　[DataMember]
　public int Age { get; set; }
}
[ServiceContract]
public interface IPeopleService
{
　[OperationContract]
　List<Person> GetPeople();
　[OperationContract]
　void UpdatePeople(List<Person> inserts, List<Person> updates,
　　List<Person> deletes);
}

and implemented it in the simplest possible way ( no thread-safety, no concurrency );

public class PeopleService : IPeopleService
{
　static PeopleService()
　{
　　people = new Dictionary<int, Person>();
　　people.Add(1, new Person() { Id = 1, FirstName = "Mike", LastName = "Taulty", Age = 18 });
　　people.Add(2, new Person() { Id = 2, FirstName = "Mike", LastName = "Ormond", Age = 78 });
　　people.Add(3, new Person() { Id = 3, FirstName = "Daniel", LastName = "Moth", Age = 101});
　}
　public List<Person> GetPeople()
　{
　　return (people.Values.ToList());
　}
　public void UpdatePeople(List<Person> inserts, List<Person> updates, List<Person> deletes)
　{
　　if (inserts != null)
　　{
　　　foreach (Person p in inserts)
　　　{
　　　　p.Id = nextId++;
　　　　people.Add(p.Id, p);
　　　}
　　}
　　if (deletes != null)
　　{
　　　foreach (Person p in deletes)
　　　{
　　　　people.Remove(p.Id);
　　　}
　　}
　　if (updates != null)
　　{
　　　foreach (Person p in updates)
　　　{
　　　　Person updateEntry = people[p.Id];
　　　　updateEntry.FirstName = p.FirstName;
　　　　updateEntry.LastName = p.LastName;
　　　　updateEntry.Age = p.Age;
　　　}
　　}
　}
　private static Dictionary<int, Person> people;
　private static int nextId = 4;
}

and I made sure that the web.config file that had been edited by the tool when I inserted the WCF service had basicHttpBinding rather than the wsHttpBinding you get by default.