protected void BtnReturnRental_ServerClick(object sender, EventArgs e)
 {
     SourceRentals.Delete();
     GvwRentals.DataBind();
     ScriptManager.RegisterStartupScript(BtnReturnRental, GetType(), "ReturnRentalModal",
                                         @"$('#ReturnRentalModal').modal('hide');", true);
 }
 protected void BtnConfirmRequest_ServerClick(object sender, EventArgs e)
 {
     SourceRentals.Insert();
     LvwBooks.DataBind();
     BtnRequestRentV.DataBind();
     ScriptManager.RegisterStartupScript(BtnConfirmRequest, GetType(), "ConfirmRequestModal",
                                         @"$('#ConfirmRequestModal').modal('hide');", true);
 }