js_html_input中autocomplete="off"在chrom中失效的解决办法 使用JS模拟锚点跳转 js如何获取url参数 C#模拟httpwebrequest请求_向服务器模拟cookie发送 实习期学到的技术（一） LinqPad的变量比较功能 ASP.NET EF 使用LinqPad 快速学习Linq

js_html_input中autocomplete="off"在chrom中失效的解决办法

分享网上的2种办法：

1-可以在不需要默认填写的input框中设置 autocomplete="new-password"（已实测，有效）

网上咱没有找到对其详细解释，但是发现163邮箱的登录注册是这么用的，

 --create SQL 安装完毕linqPad之后，打开软件 --Add Connection-->Build data context automatically(Default(LINQ to SQL))

我们在linqPad的query标签里把Language 选择为c# Expression ，把Connection 选择数据MyFirstEF 

1：Linq left join(left join 是Left outer join 简写)

在面板中输入Linq，点击运行或者直接按F5【注意CustomerInfo/OrderInfo及字段 都需要按照EF中的格式写(不能按照数据库格式)】

from c in CustomerInfo
join o in OrderInfo
on c.Id equals o.CustomerId
into MyLeftJoin
from tt in MyLeftJoin.DefaultIfEmpty()
select new
{
cname=c.CustomerName,
//这里主要第二个集合有可能为空。需要判断
//oname=tt==null?"":tt.OrderName
oname=tt.OrderName
}

对应SQL为：

SELECT [t0].[customerName] AS [cname], [t1].[orderName] AS [oname]
FROM [CustomerInfo] AS [t0]
LEFT OUTER JOIN [OrderInfo] AS [t1] ON ([t0].[id]) = [t1].[customerId]

对应lambda表达式为：

CustomerInfo
.GroupJoin (
OrderInfo,
c => (Int32?)(c.Id),
o => o.CustomerId,
(c, MyLeftJoin) =>
new
{
c = c,
MyLeftJoin = MyLeftJoin
}
)
.SelectMany (
temp0 => temp0.MyLeftJoin.DefaultIfEmpty (),
(temp0, tt) =>
new
{
cname = temp0.c.CustomerName,
oname = tt.OrderName
}
)

2:Linq right join(right join 是Right outer join 简写)[最后生成SQL还是left join]

 在面板中输入Linq，点击运行或者直接按F5

from o in OrderInfo
join c in CustomerInfo
on o.CustomerId equals c.Id
into MyRightJoin
from tt in MyRightJoin.DefaultIfEmpty()
select new
{
//这里集合有可能为空。需要判断
//cname=tt==null?"":tt.CustomerName,
cname=tt.CustomerName,
oname=o.OrderName
}

对应SQL为：

SELECT [t1].[customerName] AS [cname], [t0].[orderName] AS [oname]
FROM [OrderInfo] AS [t0]
LEFT OUTER JOIN [CustomerInfo] AS [t1] ON [t0].[customerId] = ([t1].[id])

对应lambda表达式为：

OrderInfo
.GroupJoin (
CustomerInfo,
o => o.CustomerId,
c => (Int32?)(c.Id),
(o, MyRightJoin) =>
new
{
o = o,
MyRightJoin = MyRightJoin
}
)
.SelectMany (
temp0 => temp0.MyRightJoin.DefaultIfEmpty (),
(temp0, tt) =>
new
{
cname = tt.CustomerName,
oname = temp0.o.OrderName
}
)

3：Linq inner join

在面板中输入Linq，点击运行或者直接按F5

from c in CustomerInfo
join o in OrderInfo
on c.Id equals o.CustomerId
select new
{
cname=c.CustomerName,
oname=o.OrderName
}

对应SQL为：

SELECT [t0].[customerName] AS [cname], [t1].[orderName] AS [oname]
FROM [CustomerInfo] AS [t0]
INNER JOIN [OrderInfo] AS [t1] ON ([t0].[id]) = [t1].[customerId]

对应lambda表达式为：

CustomerInfo
.Join (
OrderInfo,
c => (Int32?)(c.Id),
o => o.CustomerId,
(c, o) =>
new
{
cname = c.CustomerName,
oname = o.OrderName
}
)

暂时就到这里，其他的参考官方文档。 

 参考链接：

ASP.NET MVC EF直接更新数据(不需查询)：http://www.cnblogs.com/Dr-Hao/p/5255630.html

ASP.NET EF(LINQ/Lambda查询)：http://www.cnblogs.com/Dr-Hao/p/5356928.html