c#LINQ:根据文件大小过滤文件列表 [英] c# LINQ: Filter List of Files based on File Size

问题描述

我需要一些使用LINQ来根据文件大小提交文件列表的帮助.我有一些代码，但它使用的是file.length而不是FileInfo(file).length.我不知道如何在表达式中实现对象'FileInfo'.帮助吗?

I need some help using LINQ to filer a list of files based on the file size. I have some code but it's using file.length instead of FileInfo(file).length. I don't know how to implement an object 'FileInfo' in the expression. HELP?

        {            
            IEnumerable<string> result = "*.ini,*.log,*.txt"
            .SelectMany(x => Directory.GetFiles("c:\logs", x, SearchOption.TopDirectoryOnly))
                            ;

            result = result
                .Where(x => (x.Length) > "500000")

               ;

       }

推荐答案

您应该可以执行以下操作.

You should be able to do something like this.

使用DirectoryInfo，GetFiles将返回FileInfo的集合，而不是字符串.

Using a DirectoryInfo, the GetFiles will return a collection of FileInfo instead of strings.

new DirectoryInfo(@"c:\logs")
    .GetFiles("*.ini,*.log,*.txt", SearchOption.TopDirectoryOnly)
    .Where(f => f.Length > 500000);

当然，如果愿意，您总是会内联创建FileInfo.

Of course you would always create FileInfo inline if you wanted to.

如果您只想返回文件名.

If you just wanted the filenames back..

IEnumerable<string> results = new DirectoryInfo(@"c:\logs")
    .GetFiles("*.ini,*.log,*.txt", SearchOption.TopDirectoryOnly)
    .Where(f => f.Length > 500000)
    .Select(f => f.FullName);

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