C# Modify objects in a list of objects

Question

I have a list of objects returning from a function. How I can traverse the list and modify some objects, like append a specific string to all cells (integers) of a specific column? I could also add 2 more string columns: sid_s and num_s if its easier...

List<object> data = (from q in dc.Queries
                                 join ss in dc.Sites on q.SiteId equals ss.Siteid
                                 where q.CTid == 100
                                 select new
                                 {
                                     s.id, //integer to string
                                     q.name,
                                     q.num
                                 }).ToList<object>();

Here is my list:

sid | name | num

100 | a | 2001

101 | b | 2002

I want to change it to:

sid | name | num

100qq | a | 2001zz

101qq | b | 2002zz

OR

sid | name | num | sid_s | num_s

100 | a | 2001| 100qq |2001zz

101 | b | 2002| 101qq |2002zz

You can use `for` or `foreach` loop. :) – Jenish Rabadiya Jun 09 '17 at 08:33 — Jenish Rabadiya, Jun 09 '17 at 08:33

score 1 · Answer 1 · answered Jun 09 '17 at 08:33

1

Use foreach and loop through the list :

foreach(MyObject obj in myList)
{
   obj.yourProp1 = "newValue";       
}

answered Jun 09 '17 at 08:33

Sajeetharan

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please see my example – aggelos Jun 09 '17 at 08:47
post how you generate the list – Sajeetharan Jun 09 '17 at 09:11
I edited my question – aggelos Jun 09 '17 at 09:19
IMO the solution of @Sajeetharan will not work since foreach generates a copy of the original object (MyObject) and the code is manipulating the copy, not the original instance. – d00d May 29 '20 at 14:23

C# Modify objects in a list of objects

1 Answers1