1.连接服务器：本地；账户：sa；密码：***；数据库：saier；
string strConnect = "server =.;uid = sa; pwd = ***;database = saier";
2.执行sql语句对数据库进行操作
SqlConnection conConnection = new SqlConnection(strConnect);
conConnection.Open();
string cmd="insert into zhanghao values('"+textBox1.Text+"',"+"'"+textBox2.Text+"'"+")";
SqlCommand com=new SqlCommand(cmd,conConnection);
com.ExecuteNonQuery();//执行sql
conConnection.Close();
