[RESOLVED]databinding dropdown problem

I have a dropdown that is populated through a stored procedire triggered from the chnage of a different drop down.

I am getting the message

Specified argument was out of the range of valid values.
Parameter name: value

does any know what this means so i can start to investigate, I cannot get debug working so I dont knwo where to start looking

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I Have changed code too:

Code:

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ddSectorName.SelectedIndex = 0

ddSectorName.DataSource = dsSectorName
ddSectorName.DataTextField = "SECT_NM"
ddSectorName.DataValueField = "SECT_ID"
ddSectorName.DataBind()

ddSectorName.Items.Insert(0, "All")
ddSectorName.Items(0).Value = "%"

ddSectorName.SelectedIndex = 0

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it seems that the dropdown was stroing the indexnumber for the currently selected item in viewstate, and when databinding if the new list of items was not as big as the previous then it couldnt find the index and it would fall over.

The code to generate the dropdowns would help. HTML and C# or VB.Net script.

DJ

Drop down change

Code:

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    Private Sub ddChannelName_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ddChannelName.SelectedIndexChanged
        Dim dsSectorName As New DataSet
        Dim cmpData As New dataaccess
        Dim strChannelID As String = ddChannelName.SelectedItem.Value
        dsSectorName = cmpData.getSectNm(strChannelID)
        ddSectorName.Items.Clear()
        ddSectorName.DataSource = dsSectorName
        ddSectorName.DataTextField = "SECT_NM"
        ddSectorName.DataValueField = "SECT_ID"
        ddSectorName.DataBind()
        ddSectorName.Items.Insert(0, "All")
        ddSectorName.Items(0).Value = "%"
    End Sub

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Instead of:

Code:

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ddSectorName.Items.Insert(0, "All")
ddSectorName.Items(0).Value = "%"

---

Try:

Code:

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Dim newItem As ListItem
newItem.Text = "All"
newItem.Value = "%"

ddSectorName.Items.Insert(0, newItem)

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DJ

thanks DJ, but this didn't help. The error occurs when the event fires and ddSectorName index was not currently on 'All'.

Any ideas, or an english translation of the error message