从文件夹'喜欢'搜索文件 [英] Search file from a Folder 'Like'

问题描述

DearSir，



我需要上传创建的文件而不传递文件名的完整路径。







Ex.Stanly.doc

Stanly1.doc

stanly2.doc



我可以像C：//Project//EMP//Stanly.doc那样从前端传来。



我要求的输出是：stanly2.doc



问候

Stanly

解决方案

这有点复杂，因为你想找到一组基于字符串的数字的最高数值

 stanly1.doc 
 stanly2.doc 
 stanly10.doc 

字符串比较会说stanly2.doc的值最高。您可以通过一些LINQ方法的司法应用程序和正则表达式来提取数字：

  string  [] files = Directory.GetFiles（ @  D：\ Temp，  stanly * .doc，SearchOption.AllDirectories）; 
正则表达式编号= 新正则表达式（ @  （小于？？= *）\d +（= \.doc 

？））;
var highest = files.OrderByDescending（f = > INT .Parse（number.Match（F）。价值））首先（）;
Console.WriteLine（最高）;

您可以获得与该模式匹配的文件数量：

 int Number = Directory.GetFiles（path，pattern）。Length; 

然后使用这个用于创建新文件的编号ex：

 int Number = Directory.GetFiles（C：\\ myfolder，Stanly *。 TXT）长度。 
 File.WriteAllText（C：\\myfolder \\Stanly+ Number + 1 +。txt，some text）; 
 

DearSir,

I need to last created file without passing fullpath of file name.



Ex.Stanly.doc
Stanly1.doc
stanly2.doc

I can able to pass from the fron end like "C://Project//EMP//Stanly.doc"

My Required Output is:stanly2.doc

Regards
Stanly

解决方案

This is a little complex, because you want to find the highest numeric value of a group of string based numbers

stanly1.doc
stanly2.doc
stanly10.doc

And the string comparison will say that stanly2.doc has the highest value. You can do it with a little judicial application of LINQ methods and a regex to extract the number:

string[] files = Directory.GetFiles(@"D:\Temp", "stanly*.doc", SearchOption.AllDirectories);
Regex number = new Regex(@"(?<=.*?)\d+(?=\.doc

)"); var highest = files.OrderByDescending(f => int.Parse(number.Match(f).Value)).First(); Console.WriteLine(highest);

You can get the number of files matching the pattern :

int Number=  Directory.GetFiles("path", "pattern").Length;

And then use this number for creating new file ex :

int Number=  Directory.GetFiles("C:\\myfolder", "Stanly*.txt").Length;
File.WriteAllText("C:\\myfolder\\Stanly"+Number+1+".txt","some text");

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