blocks|key|1210009|text|看看System.IO.Directory类和静态方法GetFiles。它有一个接受路径和搜索模式的重载。示例：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1210010|+string[]+files+=+System.IO.Directory.GetFiles(path,+"*.txt");|code-block|syntax|javascript|1210011|entityMap^0|2|J|R|8|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

Look at the <code>System.IO.Directory</code> class and the static method <code>GetFiles</code>. It has an overload that accepts a path and a search pattern. Example:

<pre><code> string[] files = System.IO.Directory.GetFiles(path, "*.txt");
</code></pre>

blocks|key|995839|text|您可以使用Directory类|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|995840|+Directory.GetFiles(path,+"*.txt",+SearchOption.AllDirectories)|code-block|syntax|javascript|995841|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.io.directory.aspx^0|5|9|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

You could use the <a href="http://msdn.microsoft.com/en-us/library/system.io.directory.aspx" rel="noreferrer">Directory</a> class

<pre><code> Directory.GetFiles(path, "*.txt", SearchOption.AllDirectories)
</code></pre>

blocks|key|995885|text|实际上，这很容易。您可以将System.IO.Directory类与System.IO.Path结合使用。类似于(使用LINQ使其更容易)：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|995886|var+allFilenames+=+Directory.EnumerateFiles(path).Select(p+=>+Path.GetFileName(p));

//+Get+all+filenames+that+have+a+.txt+extension,+excluding+the+extension
var+candidates+=+allFilenames.Where(fn+=>+Path.GetExtension(fn)+==+".txt")
+++++++++++++++++++++++++++++.Select(fn+=>+Path.GetFileNameWithoutExtension(fn));|code-block|syntax|javascript|995887|当然，这种技术也有很多不同的变体。如果你的过滤器更简单，其他一些答案也会更简单。这种方法的优点是延迟枚举(如果这很重要)和更灵活的过滤，但代价是需要更多的代码。|995888|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.io.directory.aspx|1|http://msdn.microsoft.com/en-us/library/system.io.path.aspx^0|D|J|Y|E|D|J|0|Y|E|1|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@$9|11|A|12|1|13]|$9|14|A|15|1|16]]|E|$]]|$1|F|3|G|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|18|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|19|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]]]

It's quite easy, actually. You can use the <a href="http://msdn.microsoft.com/en-us/library/system.io.directory.aspx" rel="noreferrer"><code>System.IO.Directory</code></a> class in conjunction with <a href="http://msdn.microsoft.com/en-us/library/system.io.path.aspx" rel="noreferrer"><code>System.IO.Path</code></a>. Something like (using LINQ makes it even easier):

<pre><code>var allFilenames = Directory.EnumerateFiles(path).Select(p =&gt; Path.GetFileName(p));

// Get all filenames that have a .txt extension, excluding the extension
var candidates = allFilenames.Where(fn =&gt; Path.GetExtension(fn) == ".txt")
 .Select(fn =&gt; Path.GetFileNameWithoutExtension(fn));
</code></pre>

There are many variations on this technique too, of course. Some of the other answers are simpler if your filter is simpler. This one has the advantage of the delayed enumeration (if that matters) and more flexible filtering at the expense of more code.

blocks|key|1210248|text|下面的方法只返回具有特定扩展名的文件(例如:带.txt但不带.txt1的文件)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1210249|public+static+IEnumerable<string>+GetFilesByExtension(string+directoryPath,+string+extension,+SearchOption+searchOption)
++++{
++++++++return
++++++++++++Directory.EnumerateFiles(directoryPath,+"*"+%2B+extension,+searchOption)
++++++++++++++++.Where(x+=>+string.Equals(Path.GetExtension(x),+extension,+StringComparison.InvariantCultureIgnoreCase));
++++}|code-block|syntax|javascript|1210250|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The method below returns only the files with certain extension (eg: file with .txt but not .txt1)

<pre><code>public static IEnumerable&lt;string&gt; GetFilesByExtension(string directoryPath, string extension, SearchOption searchOption)
 {
 return
 Directory.EnumerateFiles(directoryPath, "*" + extension, searchOption)
 .Where(x =&gt; string.Equals(Path.GetExtension(x), extension, StringComparison.InvariantCultureIgnoreCase));
 }
</code></pre>

blocks|key|995972|text|使用此代码读取具有所有类型扩展文件的文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|995973|string[]+sDirectoryInfo+=+Directory.GetFiles(SourcePath,+"*.*");|code-block|syntax|javascript|995974|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use this code for read file with all type of extension file. 

<pre><code>string[] sDirectoryInfo = Directory.GetFiles(SourcePath, "*.*");
</code></pre>

Given a folder path (like <code>C:\Random Folder</code>), how can I find a file in it that holds a certain extension, like <code>txt</code>? I assume I'll have to do a search for <code>*.txt</code> in the directory, but I'm not sure how I'm supposed to start this search in the first place.

Find a file with a certain extension in folder

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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给定文件夹路径(如C:\Random Folder)，如何在其中找到包含特定扩展名的文件(如txt )？我假设我必须在目录中搜索*.txt，但是我不确定首先应该如何开始搜索。

问在文件夹中查找具有特定扩展名的文件
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