无法将类型'System.Collections.Generic.IEnumerable <AnonymousType#1>'隐式转换为'System.Collections.Generic.List <string>

Question

我有以下代码:

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

但是关于

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

编译时收到错误

无法隐式转换'System.Collections.Generic.List<AnonymousType#1>'为'System.Collections.Generic.List<string>'

需要帮忙.

Answer 1

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());

然后你可以打电话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();

Answer 2

如果你想要它List<string>,摆脱匿名类型并添加一个.ToList()电话:

List<string> list = (from char c in source
                     select c.ToString()).ToList();