Question

In Delphi Prism, I need to assign objectcollection from ListBox to an ArrayList in a single statement. So far I have not found any solution.

In Delphi, this is how I did it.

theUser.Groups.Assign(ListBox1.Items);

Groups is a TList in Delphi and ArrayList in Delphi Prism. When I tried to do the same in delphi prism, it gives me the following errors.

“Groups.TGroupList” does not contain a definition for “Assign” in expression “theUser.groups.Assign”

If ArrayList doesn’t have method that accepts objectcollection, then I will have to loop through each objects in the ListBox items and add it to ArrayList.

How would you do it?

Thanks in advance.

Answer 1

You should use the AddRange() method of ArrayList.

The equivalent to your Delphi code is:

theUser.Groups.Clear();
theUser.Groups.AddRange(ListBox1.Items);