.net core dapper (2)

0.0  今天还是简单的更一篇(在睡梦中被叫醒强迫更新的一篇)

  　　人生得意须尽欢,莫使金樽空对月

  1. 简单的插入数据,然后查询整个表

 public static void Main(string[] args)
        {
            var connectionString = "Server=.;Database=Demo;User Id=sa;Password = keno;";

            //02 insert 
            var customerModel = new Customer { CustomerName = "张三", Address = "北京", City = "北京", Country = "中国", PostalCode = "121212" };
            using (var connection = new SqlConnection(connectionString))
            {
                string sql = "insert into [dbo].[Customer]([CustomerName],[Address],[City],[PostalCode],[Country]) values(@CustomerName,@Address,@City,@PostalCode,@Country)";
                var addRow = connection.Execute(sql, customerModel);
                Console.WriteLine(addRow);

                var customers = connection.Query<Customer>("select * from [dbo].[Customer]").ToList();

                foreach (var customer in customers)
                {
                    Console.WriteLine("id: " + customer.CustomerID + " CustomerName:  " + customer.CustomerName + " Address: " + customer.Address + " City: " + customer.City + " PostalCode: " + customer.PostalCode);
                }
            }

            Console.ReadKey();
        }

显示结果

2.如果将强类型去掉,他的结果会变成一个动态类型

var customers = connection.Query("select * from [dbo].[Customer]").ToList();

3.删除

 //03 delete
            using (var connection = new SqlConnection(connectionString))
            {
                var count = connection.Execute("delete from customer where customerid=@customerId", new { @customerId = 1 });
                if (count > 0)
                {
                    Console.WriteLine("Delete Success" + count);
                }
                else
                {
                    Console.WriteLine("Delete Failed" + count);
                }
            }

insert  update delete 使用同一个方法 excuate 返回数据的执行结果

好了今天的内容就写到这儿了,我们都知道在一个复杂的项目中不仅仅是单条数据的 CRUD ,那么我接着下来研究将会是数据的批量执行及数据的复杂查询

see you tomorrow!