protected void gwvUsuario_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            if (e.CommandName == "Eliminar")
            {
                int    index        = Convert.ToInt32(e.CommandArgument);
                string s_idItem     = gwvUsuario.DataKeys[index].Values["idUsuario"].ToString();
                int    countArtAsig = 0;
                countArtAsig = objUsuario.EliminaUsuario(Convert.ToInt32(s_idItem));

                if (countArtAsig == 0)
                {
                    string cleanMessage = "El Usuario fué eliminado correctamente.";
                    var    sb           = new System.Text.StringBuilder();
                    sb.Append(@"<script language='javascript'>");
                    sb.Append(@"alert('" + cleanMessage + "');");
                    sb.Append(@"</script>");
                    ScriptManager.RegisterClientScriptBlock(this.Page, this.Page.GetType(), "alert", sb.ToString(), false);
                }
                else
                {
                    string cleanMessage = "El usuario que requiere eliminar aun tiene articulos asignados";
                    var    sb           = new System.Text.StringBuilder();
                    sb.Append(@"<script language='javascript'>");
                    sb.Append(@"alert('" + cleanMessage + "');");
                    sb.Append(@"</script>");
                    ScriptManager.RegisterClientScriptBlock(this.Page, this.Page.GetType(), "alert", sb.ToString(), false);
                }
            }
            ActualizaGrid();
        }