DropDownList SelectedIndex not changing

I have a webform with a databound DropDownList on it. After selecting an entry from the list and submitting the form, the SelectedIndex property still contains the default value rather than the value that I selected from the list. I have other similary configured webforms with databound DropDownLists and they all work as expected. The only differences are that the form that doesn't work contains a UserControl and the pull their data from different tables. Any Ideas?

The first thing that comes to mind is the possibility of re-binding the control when your page is reloaded. Where are you binding the DropDownList? And are you verifying that property "Page.IsPostBack = False" before executing the code to bind the control?

I have the same problem.
I did the binding in control's properties window. can somebody tell how to make it work?

hi,demtet,
can you tell how you made your other forms work? thanks.

Only bind your data to the dropdownlist if Not page.ispostback=true. From then on the viewstate if the control will retain the list and it should highlight your chosen item.

i.e.

'Page Load event
If not page.ispostback then
BindData()
End If

Private Sub BindData
'code to bind data to dropdownlist
End Sub

thanks.

another question:

How to populate date to datagrid programly? I want to fill the grid by a query result.

VB Code:

Dim sql As String = "SELECT * FROM DPSlisting"
        Dim ConnStr As String = "xxxxconn string xxxxx"
        Dim mySQLconn As New SqlConnection(ConnStr)
        mySQLconn.Open()
        Dim mysqladapter As New SqlDataAdapter()
        mysqladapter.SelectCommand = New SqlCommand(sql, mySQLconn)
        Dim myDS As New DataSet()
        mysqladapter.Fill(myDS)
        mySQLconn.Close()
 
        ddlListing.DataSource = myDS
        ddlListing.DataTextField = ("ReportDate")
        ddlListing.DataBind()

hope that helped?