private void textBox1_TextChanged(object sender, EventArgs e) { if (string.IsNullOrEmpty(txtSearch.Text)) { LoadMemberInfoByDelFlag(0); return; } var temp = 0; if (char.IsDigit(txtSearch.Text[0])) { temp = 2; } else { temp = 1; } var bll = new MemberInfoBLL(); dgvMemmber.AutoGenerateColumns = false; dgvMemmber.DataSource = bll.GetMemberInfoBySerach(txtSearch.Text, temp); dgvMemmber.SelectedRows[0].Selected = false; }