過濾器文件通過使用C＃

Question

用下面的代碼創建日期，我可以合併存在於一個目錄

var allLines = Directory.GetFiles(directory, "*.txt") 
         .SelectMany(f => File.ReadLines(f)); 
File.WriteAllLines(outputFileName, allLines); 

如何修改它來合併文件，其最新創作是今天的文本文件？

DirectoryInfo info = new DirectoryInfo(""); 
FileInfo[] files = info.GetFiles().OrderBy(p => p.CreationTime).ToArray(); 

我該如何組合這段代碼？

Answer 1

DirectoryInfo info = new DirectoryInfo(directory); 

var allLines = info.GetFiles("*.txt") 
        .Where(p => p.CreationTime.Date == DateTime.Today) 
        .OrderBy(p => p.CreationTime) 
        .SelectMany(p => File.ReadAllLines(p.FullName)); 

File.WriteAllLines(outputFileName, allLines); 

Answer 2

試試這個：

var allLines = Directory.GetFiles(directory, "*.txt") 
    .Where(x => new FileInfo(x).CreationTime.Date == DateTime.Today.Date) 
    .SelectMany(f => File.ReadLines(f)); 

Answer 3

使用File.GetCreationTime方法：

var allLines = Directory.EnumerateFiles(directory, "*.txt", SearchOption.TopDirectoryOnly) 
         .Where(path => File.GetCreationTime(path).Date == DateTime.Today) 
         .SelectMany(f => File.ReadLines(f));