private void toolStripButton1_Click(object sender, EventArgs e) { radCheckBoxElement1.Checked = true; this.filter = "where username='******' "; Filter.FrmFilterHistoriLogin frmFilterHistoryLogin = new Filter.FrmFilterHistoriLogin(this, this.username); frmFilterHistoryLogin.ShowDialog(); if (this.filter == "where username='******' ") { radCheckBoxElement1.Checked = false; return; } this.count_no_limit = UserQuery.CountNoLimitHistoryLoginUser(this.filter); RefreshData(); }