protected void lstCompany_SelectedIndexChanged(object sender, EventArgs e)
    {
        DataTable dt = objCompBLL.Get_CompanyRelationships(UDFLib.ConvertToInteger(lstCompany.SelectedValue), GetSessionUserID());

        foreach (ListItem li in lstCompany1.Items)
        {
            DataRow[] dr = dt.Select("child_company_id = " + li.Value + " and relation =" + ddCompRelationshipType.SelectedValue);
            if (dr.Length > 0)
            {
                li.Selected = true;
            }
            else
            {
                li.Selected = false;
            }
        }
    }