sliverlight: The remote server returned an error: NotFound.

.Background 

 

I want to use the session in sliverlight, so I create wcf set Session and get Session. 

why use the wcf operate the session? because the sliverlight don't support the session .

 

.phenomenon

I create the wcf

1)add the" <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/>" in web.config.

 

2) modify the services class " [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]"

 

 

3)add namespace "System.web" to project. Now you can use the httpcontext.current.seesion .

 

4) I add two method in service class (getSession and setSession) ,  code is here:

[ServiceContract(Namespace = "")] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class LoginService { [OperationContract] public Member Login(string UserName, string Passwrod) { Hashtable ht = new Hashtable(); ht.Add("@Login_Name", UserName); ht.Add("@PWD", Passwrod); DataTable dt = SQLHelper.getDataTable("sp_Login", ht); if (dt != null && dt.Rows.Count > 0) { Member m = new Member(); m.UserName = dt.Rows[0]["Login_Name"].ToString(); m.ID = dt.Rows[0]["Ref_No"].ToString(); m.TeamID = dt.Rows[0]["Team_ID"].ToString(); m.Role = dt.Rows[0]["Role_ID"].ToString(); SetObjectToSession("User", m as object); return m; } return null; } [OperationContract] public void SetObjectToSession(string name,object value) { HttpContext.Current.Session.Add(name, value); } [OperationContract] [ServiceKnownType(typeof(Member))] public object GetSessionObject(string key) { return HttpContext.Current.Session[key]; }  

 

when I call login function ,I will save the member data to the session. this logic is right.

but another page getSession that throw the "The remote server returned an error: NotFound".

I am so grief, I search the resources that explain the server side or client side have error setting.

I think this error it is the client side don't know what type return.  because I return object don't member data.

but I set the session is member data. 

 

.solution

I modify the getSession function return the member data ,this problem have fixed. 

why the wcf don't know convert the object to member ? my function cann't hardcode member type.

I think use the serviceknowtype will fix this problem ,so I try is ok.