无法隐式转换类型“System.Collections.Generic.IEnumerable<AnonymousType#1>"到“System.Collections.Generic.List<string>" [英] Cannot implicitly convert type &#39;System.Collections.Generic.IEnumerable&lt;AnonymousType#1&gt;&#39; to &#39;System.Collections.Generic.List&lt;string&gt;

问题描述

我有以下代码:

List<string> aa = (from char c in source
                   select new { Data = c.ToString() }).ToList();

但是呢

List<string> aa = (from char c1 in source
                   from char c2 in source
                   select new { Data = string.Concat(c1, ".", c2)).ToList<string>();

编译时报错

无法将类型 'System.Collections.Generic.List' 隐式转换为 'System.Collections.Generic.List'

Cannot implicitly convert type 'System.Collections.Generic.List<AnonymousType#1>' to 'System.Collections.Generic.List<string>'

需要帮助.

推荐答案

IEnumerable<string> e = (from char c in source
                        select new { Data = c.ToString() }).Select(t = > t.Data);
// or
IEnumerable<string> e = from char c in source
                        select c.ToString();
// or
IEnumerable<string> e = source.Select(c = > c.ToString());

<小时>

然后你可以调用ToList():

List<string> l = (from char c in source
                  select new { Data = c.ToString() }).Select(t = > t.Data).ToList();
// or
List<string> l = (from char c in source
                  select c.ToString()).ToList();
// or
List<string> l = source.Select(c = > c.ToString()).ToList();

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