Set selected values in asp ListBox with one line

Question

I'm trying to set the selected values in an asp ListBox webcontrol from a string[] but I'm getting the error

Only assignment, call, decrement, increment and new object expressions can be used as a statement Here's what I have so far...

string[] pageRoles = new string[] {"Admin", "Users", "Publisher"};
pageRoles.ToList().ForEach(r => rolesListBox.Items.FindByValue(r).Selected == true);

Answer 1

I believe the problem is you were using a comparison operator instead of assignment.

string[] pageRoles = new string[] {"Admin", "Users", "Publisher"};
pageRoles.ToList().ForEach(r => rolesListBox.Items.FindByValue(r).Selected = true);