DropDownList Selecting item

[Guest]

Using Visual Studio.net 2003 to create an aspx web form I am having a
problem selecting an item from DropDownListBox with id= ListBoxStudies.
I can see the items from the bound database table but when I click on an item
the selected item stays at itemindex 0. What must I do to have the
itemindex change when I click on an item. What's missing from the following
code?


ListBoxStudies.DataSource = BICDataSet.Tables("protocols")
ListBoxStudies.DataTextField = "Study_name"
ListBoxStudies.DataValueField = "irb_number"
ListBoxStudies.DataBind()


I have tested this using a submit button and the _SelectedIndexchanged event
and I still always get selectedindex = 0.

Private Sub DropDownListStudies_SelectedIndexChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs)
Dim study_name As String = Session("study_name")
study_name = ListboxStudies.SelectedItem.Text
End Sub

 

[Steve C. Orr [MVP, MCSD]]

You may want to ensure you're binding only on the initial page load and not
on each postback, which could effectively overwrite the user's selection.
Here's an example:

'Page_Load event...
If Not Page.IsPostBack() Then
ListBoxStudies.DataSource = BICDataSet.Tables("protocols")
ListBoxStudies.DataTextField = "Study_name"
ListBoxStudies.DataValueField = "irb_number"
ListBoxStudies.DataBind()
End If

 

[Guest]

Wow! That was great; I gave you a direct question and you gave me a direct
and effective response. The application works: All is love; all is peace;
all is harmony.
--
Derek V. Taylor
UCI Brain Imaging Center

You may want to ensure you're binding only on the initial page load and not
on each postback, which could effectively overwrite the user's selection.
Here's an example:

'Page_Load event...
If Not Page.IsPostBack() Then
ListBoxStudies.DataSource = BICDataSet.Tables("protocols")
ListBoxStudies.DataTextField = "Study_name"
ListBoxStudies.DataValueField = "irb_number"
ListBoxStudies.DataBind()
End If