在文件信息列表中获取文件名列表

Question

How can i get file name list from

List<FileInfo> FileInfoList;

by using LINQ? I want all file names in

List<string> FileNames;

list. I don't want to construct a foreach loop and don't want to add file names iteratively.

Answer 1

You can use the Select extension method:

List<string> FileNames = FileInfoList.Select(x => x.Name).ToList();

However, if you don't really need it to be a List<T> , you can probably take advantage of Linq's lazy-execution ability by simply omitting the ToList method:

IEnumerable<string> FileNames = FileInfoList.Select(x => x.Name);

Or if you prefer query syntax:

IEnumerable<string> FileNames = from x in FileInfoList select x.Name;

Answer 2

If you only want the FileNames in FileNames list, try:

FileInfoList.ForEach(x => 
            FileNames.Add(Path.GetFileName(x.FullName)));

If you want complete file paths in FileNames try

FileInfoList.ForEach(x => 
            FileNames.Add(x.FullName));