private void WON_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        DesignNo.IsEnabled = true;
        MessageBox.Show("Selection Changed!!!");
        string contentStr = (WON.SelectedItem ?? string.Empty).ToString();
        //If AK89 is selected then the WONItem numbers have to change to 14
        if (string.Equals("AK89", contentStr, StringComparison.OrdinalIgnoreCase))
        {
            MessageBox.Show("IN AK89!!!");
            this.WONitem.Items.Clear();
            WONitem.Items.Add("-1");
            WONitem.Items.Add("-2");
            WONitem.Items.Add("-3");
            WONitem.Items.Add("-4");
            WONitem.Items.Add("-5");
            WONitem.Items.Add("-6");
            WONitem.Items.Add("-7");
            WONitem.Items.Add("-8");
            WONitem.Items.Add("-9");
            WONitem.Items.Add("-10");
            WONitem.Items.Add("-11");
            WONitem.Items.Add("-12");
            WONitem.Items.Add("-13");
            WONitem.Items.Add("-14");
            WONitem.SelectedIndex = WONitem.Items.Count - 14;

        }
        // Disable the ones done.
        //
        //contentStr = (this.WON.SelectedItem ?? string.Empty).ToString();
        //MessageBox.Show("IN AK85!!!" + contentStr);
        if (string.Equals("AK85", contentStr, StringComparison.OrdinalIgnoreCase))
        {

            contentStr = (this.DesignNo.SelectedItem ?? string.Empty).ToString();
            MessageBox.Show("IN AK85!!!" + contentStr);
            if (string.Equals(" 100019646-2", contentStr, StringComparison.OrdinalIgnoreCase))
            {
                MessageBox.Show("IN the drawingNo 100019646-2!!!");
                DesignNo.Items.Clear();
                WONitem.Items.Clear();
                MessageBox.Show("should be cleared now!!!");
                WONitem.Items.Add("-9");
                WONitem.Items.Add("-10");
                WONitem.Items.Add("-11");
                WONitem.Items.Add("-12");
                WONitem.Items.Add("-13");
                WONitem.Items.Add("-14");
                WONitem.Items.Add("-15");
                WONitem.Items.Add("-16");
                WONitem.SelectedIndex = WONitem.Items.Count - 8;
            }
            else if (string.Equals(" 100019646-1", contentStr, StringComparison.OrdinalIgnoreCase))
            {
                //contentStr = (this.DesignNo.SelectedItem ?? string.Empty).ToString();
                //if (string.Equals(" 100019646-1", contentStr, StringComparison.OrdinalIgnoreCase))

                    MessageBox.Show("IN the drawingNo 100019646-1!!!");
                    this.WONitem.Items.Clear();
                    WONitem.Items.Add("-9");
                    WONitem.Items.Add("-10");
                    WONitem.Items.Add("-11");
                    WONitem.Items.Add("-12");
                    WONitem.Items.Add("-13");
                    WONitem.Items.Add("-14");
                    WONitem.Items.Add("-15");
                    WONitem.Items.Add("-16");
                    WONitem.SelectedIndex = WONitem.Items.Count - 8;
            }
            else
                {

                }

        }


        DesignNo.IsEnabled = false;