ASP.NET MVC TASK MANAGER one-to-many relationship -

i trying learn asp.net mvc have started build small application - task manager based on tutorials on internet (mvc music store, nerd dinner, etc ...). ive got stuck while trying define actionresult method in controller.

i have model, defining activities. each activity can have several tasks.

activity 1 (each activiy has got several tasks (task 1, task 2, etc)) activity 2 activity 3 activity n

question:

i ask definition of actionresult method, return view list of tasks related selected activity.

picture here: http://sdrv.ms/z46nze

the problém is, not able define method one-to-many relationship.

whole project here in skydrive folder: http://sdrv.ms/zicbqi

please help.

in model, have following classes , context class generated mvcscaffolding:

using system; using system.collections.generic; using system.linq; using system.web; using system.componentmodel.dataannotations; using system.componentmodel.dataannotations.schema;   namespace task3.models { public class task {     public int taskid { get; set; }     public string name { get; set; }     public int activityid { get; set; }     public datetime? createdon { get; set; }     public datetime? modifiedon { get; set; }     public string pn { get; set; }     public string result { get; set; }     public string todo { get; set; }     public string responsibleperson { get; set; }     public datetime? duedate { get; set; }     public int? taskpriority { get; set; }     public string taskstatus { get; set; }      public virtual activity activity { get; set; } }  public class activity {     public int activityid { get; set; }     [required] public string name { get; set; }     public string activitytype { get; set; }     public int? activitypriority { get; set; }     public string activitystatus { get; set; }      public virtual icollection<task> tasks { get; set; } }  } 

thank much!

best regards

jaroslav plavec

change

public virtual icollection<task> tasks { get; set; } 

to

public list<task> tasks { get; set; } 

remember has serializable, icollection not, list is.