连接sqlserver数据库

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();