ArrayList and ViewState in C#

[Guest]

Hi

I have a listbox with multiple values. I want to store those selected values in an arraylist. I am not sure how to write the arraylist with ViewState in C#. The following code is the string datatype, not arraylist.

My questions ar

1. How to modify string SelectedDeptIDs to be an arraylist with ',' to be delimiter to store all selected listitems
2. How can I retrieve those values in arraylist (splite with ',' to be delimiter) when postback? Do I use Items.Clear() and Items.Add()

[code
protected string SelectedDeptID

ge

return ViewState["SelectedDeptIDs"] == null? ""string)ViewState["SelectedDeptIDs"]

se

ViewState["SelectedDeptIDs"] = value



foreach (System.Web.UI.WebControls.ListItem li in listDept.Items

if (li.Selected

SelectedDeptIDs = li.Value


[/code

Thanks for help.