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DropDownList, ListBox Core Methods
by Charles Carroll

DropDown Lists and Listboxes are easy to fill but unless one learns a few of the core methods they can be frustrating.

  • Add An Item To End:

dropWhatever.Items.Insert(0, New ListItem(" --please choose state--", -1))

  • Select an Item In Multi-select List:

dropWhatever.Items.FindByValue("MD").Selected=true

  • Find The Value via the corresponding text

drpP1.SelectedIndex = drpP1.Items.IndexOf(drpP1.Items.FindByValue("MD"))

  • Act only on Selected Items

dim listitem1 as listItem
For Each listItem1 In listboxWhatever.Items
    If oItem.Selected = true then
       ' do something with selected items
    END IF
NEXT

System.Web.UI.WebControls.ListItem is fully qualified name.

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