//按卡号\账户名称查询 private void btnSelect_Click(object sender, EventArgs e) { string userInfoName = this.txtidno.Text; if (string.IsNullOrEmpty(this.txtidno.Text)) { this.dgvUser.DataSource = UserInfoManage.GetAllUserinfos(); } else { this.dgvUser.DataSource = UserInfoManage.GetSelectUserinfoByIDOrName(userInfoName); } }