LINQ Query ForEach无法使用 [英] LINQ Query ForEach cannot use

问题描述

我有一个AnonymuosType的LINQ结果"，它的内部有一些实体对象，这些实体对象由LINQ从EF查询.

I have a LINQ "result" of anonymuosType, inside it, it have some entity object which query by LINQ from EF.

我想利用结果"来过滤实体对象并为"newResult"设置一些新值.

I would like to make used of the "result" to filter and set some new value on the entity object for the "newResult".

但是在"newResult"上的.Where()之后，我无法使用ForEach().

But I not able to use the ForEach(), after the .Where() on "newResult".

我可以知道我做错了什么吗?使用LINQ有其他替代解决方案吗? (我可以通过简单的foreach循环来实现它，但是我想通过LINQ来学习更多.)

May I know what I did wrong? Any alternative solution by using LINQ? (I can do simple foreach looping to achieve it, But I would like to learn more by using LINQ.)

var result = (from e in unmatch_epay_details
                                   join w in DB.WatReconDetails
                                   on e.RetTransRef equals w.RetTransRef
                                   into a
                                   from b in a.DefaultIfEmpty()
                                   select new
                                   {
                                       ePayDetailID = e.ePayReconDetailID,
                                       WATStatus = (b == default(WatReconDetail)) ? 0 : 1,//** if default return 0.
                                       EpayInfo = e,
                                       WATinfo = b
                                   })
                                   .OrderBy(a => a.ServerTransDateTime)
                                  .ToList();


var newResult = result
        .Where(a => a.EpayInfo.condition =="condition")
        .ForEach(b => b.EpayInfo.result=="result");//I not able to use the foreach at here.

推荐答案

ForEach()不是linq，它是List<T>上的一个函数(并且您正在使用IEnumerable<T>). 因此，请使用普通的foreach.

ForEach() is not linq, it is a function on List<T> (and you are working with IEnumerable<T>). So use normal foreach instead.

这篇关于LINQ Query ForEach无法使用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！