Question

var query = rep.GetIp()  // in this line i have the error
           .Where(x => x.CITY == CITY)
           .GroupBy(y => o.Fam)
           .Select(z => new IpDTO
                        {
                            IId = z.Key.Id,
                            IP = z.Select(x => x.IP).Distinct()
                        })
           .ToList().ForEach(IpObj => IpObj.IP.ToList().ForEach(ip => PAINTIP(ip)));

在我管理该法典时,我有错误:

不能将真空划给一种隐含的当地变量

I googled and found that it is a type issue because foreach is not a LINQ function? I cannot understand where the void is!

Answer 1

。
<代码>Select( ReturnIE amountable<T>,ToList( ReturnList<T>等

so:

List<X> x = ...Select(x => x).ToList(); // List<T>

或

x.F或Each(x => x); // void

由于您可以指定<代码> 撤销至,List<T>。

var query = rep.GetIp()  // in this line i have the err或
           .Where(x => x.CITY == CITY)
           .GroupBy(y => o.Fam)
           .Select(z => new IpDTO
                        {
                            IId = z.Key.Id,
                            IP = z.Select(x => x.IP).Distinct()
                        });

f或each (var dto in query)
{
    f或each (var ip in dto.IP)
    {
        PAINTIP(ip);
    }
}

或

var query = ....
           .SelectMany(z => z.Select(x => x.IP).Distinct());

f或each (var ip in query)
{
    PAINTIP(ip);
}

Answer 2

<>ForEach(>>>不退还任何款项。其类型无效。

http://msdn.microsoft.com/en-us/library/bwabdf9z.aspx”

Answer 3

I saw your other questions, wherein you have asked similar question for the same query. The code partially looks like this :

var Q = rep.GetIp()
        .Where(x => x.CITY == CITY)
        .GroupBy(y => o.Fam)
        .Select(z => new IpDTO
        {
          IId = z.Key.Id,
          IP = z.Select(x => x.IP).Distinct()
       });

Looks like you have used the answer as such and you are trying to assign the returned value from the query to the variable "Q". Check out your previous post : syntax in LINQ IEnumerable<string>

正如其他人所说的那样,每个回归类型都是“避免”。一旦“Q”变量开始收集,你应称“ForEach”。

友情链接