如何获取在目录中创建的特定模式的最新文件 [英] How to get the latest file of certain pattern created in a directory

问题描述

我可以使用下面的代码获取最新的内容；但是我想要以特定模式创建的最新版本，而不仅仅是最新创建的

I could get the latest created by using this below; but I want the latest created with certain pattern, not just the latest created

 var directory = new DirectoryInfo("D:\\my_dir\\dir_1\\dir_2\\");
        var smf_log_name = directory.GetFiles().OrderByDescending(f => f.LastWriteTime).First();

推荐答案

好，

Well, DirectoryInfo.GetFiles has an overload that takes a pattern argument

var directory = new DirectoryInfo("D:\\my_dir\\dir_1\\dir_2");
var smf_log_name = directory.GetFiles("*.txt").OrderByDescending(f => f.LastWriteTime).First();

请注意传递的模式，如果没有指定模式的文件，则序列将抛出InvalidOperationException

Pay attention to the pattern passed, if there are no files with the pattern specified the sequence will throw an InvalidOperationException

FileInfo result = null;
var directory = new DirectoryInfo("D:\\my_dir\\dir_1\\dir_2");
var list = directory.GetFiles("*.txt");
if(list.Count() > 0)
{
    result = list.OrderByDescending(f => f.LastWriteTime).First();
}

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