tmarkou:

Σε  ευχαριστώ πολύ για την απάντηση.

Να σαι καλά.

Σε συνέχεια του προηγούμενου εχω τα εξής :

Χρησιμοποιώ αυτη την ρουτινα για να γεμίσω ενα radcombobox στο οποίο μπορώ να κανω πολλαπλές επιλογές
μιας και καθε επιλογή έχει και checkbox.

Protected Sub RadComboBox1_ItemsRequested(ByVal o As Object, ByVal e As RadComboBoxItemsRequestedEventArgs)

        Dim data As DataTable = GetData(e.Text)
        Dim comboBox As RadComboBox = DirectCast(o, RadComboBox)
        ' Clear the default Item that has been re-created from ViewState at this point.
        comboBox.Items.Clear()

        Dim text As String = e.Text

        If text <> "" Then
            If Len(text) >= 3 Then

                Dim rows As DataRow() = data.[Select]("newprd LIKE '" + "%" + text + "%'")

                Dim itemsPerRequest As Integer = 20
                Dim itemOffset As Integer = e.NumberOfItems
                Dim endOffset As Integer = itemOffset + itemsPerRequest
                If endOffset > rows.Length Then
                    endOffset = rows.Length
                End If

                Dim i As Integer = itemOffset
                While i < endOffset
                    comboBox.Items.Add(New RadComboBoxItem(rows(i)("newprd").ToString()))
                    System.Math.Max(System.Threading.Interlocked.Increment(i), i - 1)
                End While

                e.Message = [String].Format("Items <b>1</b>-<b>{0}</b> out of <b>{1}</b>", endOffset, rows.Length)

            End If
        End If
    End Sub


    Private Function GetData(ByVal text As String) As DataTable

        If text <> "" Then

            If Len(text) >= 3 Then

                Dim seq As String = " SELECT prdcode,prdtext " + _
                                    " FROM Products " + _
                                    " where " + _
                                    " prdtext like '" + "%" + Trim(text) + "%" + "'" + _
                                    " order by prdcode "

                Dim adapter As New SqlDataAdapter(seq, ConfigurationManager.ConnectionStrings("P2OPubConnectionString").ConnectionString)

                Dim data As New DataTable()
                adapter.Fill(data)

                Return data

            End If

        End If

    End Function

Στην aspx εχω το radcombobox μέσα σε form template ως εξής :

                <FormTemplate>
                                    <td class="style29">
                                        <telerik:RadComboBox
                                            ID="RadComboBox1" runat="server" Filter="Contains" ItemsPerRequest="20" EnableVirtualScrolling="true" CheckBoxes="true"
                                            Width="350px" Height="200px"  Font-Size="X-Small" Font-Names="verdana"
                                            ShowMoreResultsBox="True" EnableLoadOnDemand="True"
                                            OnItemsRequested="RadComboBox1_ItemsRequested"
                                            style="margin: 20px auto; display:block !important;" />
               
                                        <asp:Button ID="Button1" runat="server" Text="Get Checked Items" CssClass="qsfButtonBigger" commandname="Button1Action" />
                                            <br />
                                        <asp:Label ID="itemsClientSide" runat="server" BorderStyle="None" CssClass="text" />
                                    </td>
                <Formtemplate />

Στο code behind στο commandname = "Button1Action" πρεπει να δημιουργηθει η ρουτίνα που θα διαβάσει τις τιμές από το combobox.


    Protected Sub radKOMPASS_ItemCommand(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridCommandEventArgs) Handles radKOMPASS.ItemCommand
        Select Case e.CommandName

            Case "Button1Action"

                Dim cb As RadComboBox = e.Item.FindControl("RadComboBox1")
       
        --------------------------------------------------------------

        End Select
    End Sub


Αυτό που προσπαθώ είναι να φτιάξω μια ρουτίνα (φαντάζομαι loop) που να διαβάζει τις επιλογές που έχω κλικαρει.

Σας  παρακαλώ για βοήθεια.

Ευχαριστώ εκ των προτέρων.