数据库轿车销售信息管理系统基于C#和SQLserver

s.OK, MessageBoxIcon.Exclamation);Р }Р finallyР {Р conn.Close();Р Р }Р }Р private void button2_Click(object sender, EventArgs e)Р {Р this.Visible = false;Р }Р }Р}Р2.主界面如图11所示:Р 图11Р4.点击轿车信息,双击查询按钮,编写程序代码如下:Р private void button2_Click(object sender, EventArgs e)Р {Р string connString = "Data Source=WIN-LH5EK84HEPR;Initial Catalog=大学生就业咨询系统;Integrated Security=True;Pooling=False;";Р SqlConnection connection = new SqlConnection(connString);Р mand = new mand();Р string sql = String.Format("select * FROM 学生信息表 WHERE 学号='{0}'", textBox2.Text);Р tryР {Р int i = 0;Р connection.Open(); // 打开数据库连接Р command.Connection = connection;Р mandText = sql;?//mand 对象要执行的SQL语句Р SqlDataReader dataReader = command.ExecuteReader();Р while (dataReader.Read())Р {Р i++;Р textBox8.Text = dataReader["学号"].ToString();