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.NET Forum / .NET Framework / ADO.NET / March 2008

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Loading a generic collection from a SqlReader?

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Dave - 27 Mar 2008 21:35 GMT
Hi, is there any underlying difference between loading a generic collection
from a reader using the two methods:

List<User> colUsers = new List<Users>();

           while (reader.Read())
           {
               User user = new User();
               user.FirstName      = (string)reader["FirstName"];
               user.LastName       = (string)reader["LastName"];
               colUsers .Add(user);
           }

----vs----

           while (reader.Read())
           {
               colUsers.Add(new User
                   (
                    (string)reader["FirstName"],
                    (string)reader["LastName"]
                    ));
           }

Creating the object first and then adding values worked fine.  But using the
second method by loading the values in the constructor, the colUsers.Count
was correct based on the query, but each of the object's properties in the
collection were null.  it's as if the object's weren't retaining their values
or state when added to the collection.
Dave - 28 Mar 2008 14:09 GMT
nevermind...

> Hi, is there any underlying difference between loading a generic collection
> from a reader using the two methods:
[quoted text clipped - 25 lines]
> collection were null.  it's as if the object's weren't retaining their values
> or state when added to the collection.

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