linq里这日期怎么处理？

var strSQL1 = from x in edm.VDetailSet
               where DATEADD(month, CAST(x.usefullife AS int), x.Update) >= GETDATE()select x

 DataList1.DataSource = strSQL1;
 DataList1.DataBind();

怎么把sql里的DATEADD(month, CAST(x.usefullife AS int), x.Update) >= GETDATE()用到linq里？？？
[解决办法]
lINQ to sql
var strSQL1 = from x in edm.VDetailSet
where SqlFunctions.DateAdd(month, CAST(x.usefullife AS int), x.Update) >= GETDATE()
select x;

DataList1.DataSource = strSQL1;
DataList1.DataBind();

LINQ to ef
var strSQL1 = from x in edm.VDetailSet
where SqlMethods.DateDiffMonth(month, CAST(x.usefullife AS int), x.Update) >= GETDATE()
select x;

[解决办法]

引用:

用的是vs2008

不好意思写反了，更正一下
你如果是LINQ to ef

var strSQL1 = from x in edm.VDetailSet
               where SqlFunctions.DateAdd(month, CAST(x.usefullife AS int), x.Update) >= GETDATE()
select x;

 DataList1.DataSource = strSQL1;
 DataList1.DataBind();

你如果是lINQ to sql

var strSQL1 = from x in edm.VDetailSet
               where SqlMethods.DateDiffMonth(month, CAST(x.usefullife AS int), x.Update) >= GETDATE()
select x;

------解决方案--------------------

引用:

是LINQ to ef
找不到SqlFunctions.DateAdd是不是版本问题

是的，要NET4.0以上
[解决办法]

引用:

Quote: 引用:

是LINQ to ef
找不到SqlFunctions.DateAdd是不是版本问题

是的，要NET4.0以上

版主，请教一个问题，SqlFunctions不是VS2010自带的dll吧？