无法解析类型：当我在c＃中投射自定义类时发生问题 [英] Could not resolve type: Issue while I am casting a custom class in c#

问题描述

这是非常奇怪的问题。

It is very weird problem.

我有ProfileBase类并从中创建了一个列表

I have ProfileBase class and created a list from it

List<ProfileBase> profileLists = ....

是QuickSearchProfile也来自ProfileBase。

well after i add items to this list from another list name is QuickSearchProfile which is derived from ProfileBase also.

var _list = new List<ProfileBase>();

_list.AddRange((IEnumerable<QuickSearchProfile>)list);

但我不能这样投入

var item = (profileLists[indexPath.Row] as QuickSearchProfile);

或类似

var item = (QuickSearchProfile)profileLists[indexPath.Row]; 

在这两种情况下，项目返回null。事实上，当我放一个断点，我可以看到profileLists [indexPath.Row]的类型是QuickSearchProfile

in both situation, item returns null. Actually when I put a breakpoint, I can see that profileLists[indexPath.Row]'s type is QuickSearchProfile

我的错误在哪里？

推荐答案

保存项目uncasted，并获取其完整的typename并输出，然后获取typeof（QuickSearchProfile），并做同样的。 CLR是说他们不一样 - 我相信它

save item uncasted and get its full typename and output it, then get typeof(QuickSearchProfile) and do the same. THe CLR is sayin they arent the same - I believe it

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