LINQ:如何在select期间转换查询结果？

Question

这将返回以下列表strings:

var filesizes = from fd in files
                from tag in fd.Tags
                where tag.Id == ID.FILESIZE
                select tag.Value;

下面是不行的,但有可能的方式做同样的事情来转换string到int在查询期间？

var filesizes = from fd in files
                from tag in fd.Tags
                where tag.Id == ID.FILESIZE
                select new { int.Parse(tag.Value) };

或者我应该像这里建议的那样使用ConvertAll？

Answer 1

你可以这样做:

var filesizes = from fd in files
                from tag in fd.Tags
                where tag.Id == ID.FILESIZE
                select new { FileSize = int.Parse(tag.Value) };

要么

var filesizes = from fd in files
                from tag in fd.Tags
                where tag.Id == ID.FILESIZE
                select int.Parse(tag.Value);