public ActionResult Create(Task task)
{
if (ModelState.IsValid)
{
task.ID = Guid.NewGuid();
context.Tasks.Add(task);
context.SaveChanges();
return RedirectToAction("Index");
}
ViewBag.PossibleTaskLists = context.TaskLists;
ViewBag.PossiblePriorities = context.Priorities;
return View(task);
}
public ActionResult Edit(Task task)
{
if (ModelState.IsValid)
{
context.Entry(task).State = EntityState.Modified;
context.SaveChanges();
return RedirectToAction("Index");
}
ViewBag.PossibleTaskLists = context.TaskLists;
ViewBag.PossiblePriorities = context.Priorities;
return View(task);
}
private bool Update(Task requestedTask, Task originalTask, Task newTask)
{
bool updated = false;
// timestamps!!
Type t = requestedTask.GetType();
foreach (PropertyInfo pi in t.GetProperties())
{
object serverValue = pi.GetValue(requestedTask, null);
object origValue = pi.GetValue(originalTask, null);
object newValue = pi.GetValue(newTask, null);
// if this is the TasgTags field make it simple - if this update is the last one, it wins
if (pi.Name == "TaskTags")
{
if (newTask.LastModified > requestedTask.LastModified)
{
pi.SetValue(requestedTask, newValue, null);
updated = true;
}
continue;
}
// if the value has changed, process further
if (!Object.Equals(origValue, newValue))
{
// if the server has the original value, or the new task has a later timestamp than the server, then make the update
if (Object.Equals(serverValue, origValue) || newTask.LastModified > requestedTask.LastModified)
{
pi.SetValue(requestedTask, newValue, null);
updated = true;
}
}
}
return updated;
}
