在ASP .NET Web API中使用部分更新时出现错误

Question

I am following this tutorial( What's the currently recommended way of performing partial updates with Web API? ) to implement partial updates in my web api. But doing so i am getting an error:

  Cannot convert lambda expression to type 'object[]' because it is not a delegate type 

This is my code for partial updates/patch :

   [AcceptVerbs("PATCH")]
    public user PatchDocument(int id, Delta <user> user)
    {
        var serverUser =db.users.Find(u => u.iduser = id); // This is where i get error Find(u => u.iduser = id)
        user.Patch(serverUser);

    }

Answer 1

you could try

var serverUser =db.users.FirstOrDefault(u => u.iduser == id);
if(serverUser != null)
{
    user.Patch(serverUser);
}

Edit Whoops needed ==

Answer 2

尝试这个：

var serverUser = db.users.Find(u => u.iduser == id);  // == instead of =