（常用）C# 连接数据库进行增删查改的基本模板

string conn_str = @"Server=(local); database = YJ_Database; User id = sa; Password = 123456";
            SqlConnection conn = new SqlConnection(conn_str);
            conn.Open();
            string sql = "insert into t_Organization values('"+_FNumber+"','"+_FName+"')";
            SqlCommand cmd = new SqlCommand(sql, conn);
            int n=cmd.ExecuteNonQuery();
            conn.Close();