Hi,

I have a webdropdown with loadondemand enabled and enableautofiltering set to server. The datasource for the control is a datatable with 4000+ items.

I assign the datasource on every postback but i only do a databind when the page loads for the first time.

Load on demand works fine, but when i select an item that's further in the list, the selection is lost after a postback and jumps to the first visible item in the list. Is there a workaround for this behaviour?

I use netadvantage v2010.3

Sample code to reproduce the behaviour

<form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="True">
    </asp:ScriptManager>
    <ig:WebDropDown ID="WebDropDown1" runat="server" EnableLoadOnDemand="True"
        Width="200px" EnableAutoCompleteFirstMatch="False"
        EnableAutoFiltering="Server" PageSize="10">
    </ig:WebDropDown>
    <asp:Button ID="Button1" runat="server" Text="Button" />
    </form>

Partial Public Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim dt As DataTable
        If Session("dt") Is Nothing Then
            dt = New DataTable("personen")
            dt.Columns.Add("userid", GetType(System.String))

            Dim dr As DataRow
            Dim j As Integer = 100
            For i As Integer = 1 To 4000
                dr = dt.NewRow
                dr.Item("userid") = i
                dt.Rows.Add(dr)
            Next
        Else
            dt = CType(Session("dt"), DataTable)
        End If

        Me.WebDropDown1.DataSource = dt
        Me.WebDropDown1.TextField = "userid"
        Me.WebDropDown1.ValueField = "userid"

        If Not Me.IsPostBack() Then
            Me.WebDropDown1.DataBind()
        End If

    End Sub

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
        Dim test As String = Me.WebDropDown1.SelectedItem.Text
    End Sub

End Class

Before postback:

After postback:

Any tips?

Thanks in advance!!