How to merge similar IList<T> objects in C# asp.net MVC

I have a class:

public class Data {

 public Ilist<Prod> Product;

 public Data() {}
  public Data(List<Prod> prod)
  {
      this.Product = prod
  }
}

No I try to use this class in my controller to bind values to my model

public ActionResult Index(string username)
  {
     data.Prod =  GetProductByUser(username); // this is the base user

     IList<AdditionalUsers> add_usrs = GetAddUsersForBaseUsers(username);

     // now to the data.prod (product list I need to add the prod for the base users
     //so I loop through the add users and try to get the products for each base use

     for(AdditionalUsers aid in add_usrs)
     {
            //now data.prod has products for base users. So now I need to add produts 
            //for add users using same method

     } 

}

Now in the for loop I need to call the same method GetAddUsersForBaseUsers(username); to add product for all the additional users and add it to the data.Product 开发者_Python百科list. How will I be able to do this?

You can use the Concat function, like this:

List<int> lst = new List<int>();
List<int> lst2 = new List<int>();
List<int> lst3 = new List<int>();

lst.Concat(lst2).Concat(lst3);

Ok, your constructor is wrong. You're trying to set data.Prop where Prop is a type, not a public field/property. Also, where are you declaring your data variable?

You could use the following instead: Data data = new Data(GetProductByUser(username));

Make your Product field as a publicly accessible property as well. To do this, replace public Ilist<Prod> Product; with public IList<Prod> Product { get; set;}

To Add the users, you can use the following.

foreach(AdditionalUsers aid in add_usrs)
{
   //add users
   data.Product.Add(aid);
} 

Alternatively you can just replace the property Product which is of type IList with a List and then do the following: data.Product.AddRange(add_usrs);

data.Prod = GetProductByUser(username);
IList<AdditionalUsers> add_usrs = GetAddUsersForBaseUsers(username);
List<List<Prod>> productsForAdditional = new List<List<Prod>>();
foreach(AdditionalUsers aid in add_usrs)
{
  //get all of those lists.
  productsForAdditional.Add(GetProductByUser(aid.UserName);
}
//add all of the items from all of those lists to the primary list
data.Prod.AddRange(productsForAdditional.SelectMany(list => list));