public static String[] BuscarProveedores(string prefixText)
        {
            String[] sList = null;
            List<string> sProveedorList = new List<string>();
            clsProveedores lstProveedores = new clsProveedores();

            try
            {
                DataTable dtProveedores = lstProveedores.BuscarProveedores(prefixText);

                if (dtProveedores.Rows.Count > 0)
                {
                    sProveedorList.Add(AjaxControlToolkit.AutoCompleteExtender.
                          CreateAutoCompleteItem("[TODOS]", "9999"));

                    for (int i = 0; i < dtProveedores.Rows.Count; i++)
                    {
                        sProveedorList.Add(AjaxControlToolkit.AutoCompleteExtender.
                          CreateAutoCompleteItem(dtProveedores.Rows[i]["PrvRazon"].ToString(), dtProveedores.Rows[i]["PrvCod"].ToString()));
                    }
                    sList = new String[10];
                    sList = sProveedorList.ToArray();
                }
                else
                {
                    sProveedorList.Add(AjaxControlToolkit.AutoCompleteExtender.
                          CreateAutoCompleteItem("<< SIN RESULTADOS >>", "8888"));
                    sList = new String[1];
                    sList = sProveedorList.ToArray();
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                lstProveedores = null;
            }
            return sList;
        }