delete a user based on id from my databse context - asp.net-mvc

Question

I am trying to implement the basic delete action method for a user:
private User_Manager_Interface.Models.ApplicationDbContext userDb = new User_Manager_Interface.Models.ApplicationDbContext();
// POST: /Users/Delete/5
[HttpPost]
public ActionResult Delete(int id, FormCollection collection)
{
try
{
// TODO: Add delete logic here
//.Remove(u => u.id == id);
return RedirectToAction("Index");
}
catch
{
return View();
}
}
I am not entirely sure how to delete a user.
This is what I have tried so far:
userDb.Users.Remove(); But now I don't know how to tell it to delete the user with a certain ID?
How do I do this?

Answer 1

Assuming that your userDb is DbContext (not an ObjectContext) there are a few ways to achieve your goal.
You can do this in the following way:
var user = userDb.Users.FirstOrDefault(u => u.UserId == id);
if(user != null)
{
userDb.Users.Remove(user);
}
Or you could do this:
var user = userDb.Users.FirstOrDefault(u => u.UserId == id);
if(user != null)
{
userDb.Entry(user).State= EntityState.Deleted;
userDb.SaveChanges();
}

Answer 2

Check out this tutorial - Remove Entity in Entity Framework
Sample code from tutorial -
using (var dbCtx = new SchoolDBEntities())
{
//if already loaded in existing DBContext then use Set().Remove(entity) to delete it.
var newtchr = dbCtx.Teachers.Where(t => t.TeacherName == "New teacher4")
.FirstOrDefault<Teacher>();
dbCtx.Set(Teacher).Remove(newtchr);
//Also, you can mark an entity as deleted
//dbCtx.Entry(tchr).State = System.Data.EntityState.Deleted;
//if not loaded in existing DBContext then use following.
//dbCtx.Teachers.Remove(newtchr);
dbCtx.SaveChanges();
}