查询文件夹中的文件的内容 (LINQ)代码,CSharp代码库,德仔网

代码语言

代码分类

【CSharp】查询文件夹中的文件的内容 (LINQ)

作者:DDT / 发布于2012/10/8/ 480

查询指定目录树中的所有文件、打开每个文件并检查其内容。

<div>using System.IO;
class QueryContents
{
 public static void Main()
 {
 // Modify this path as necessary.
 string startFolder = @"c:\program files\Microsoft Visual Studio 9.0\";</div>
<div> // Take a snapshot of the file system.
 DirectoryInfo dir = new DirectoryInfo(startFolder);</div>
<div> // This method assumes that the application has discovery permissions
 // for all folders under the specified path.
 IEnumerable<System.IO.FileInfo> fileList = dir.GetFiles("*.*", SearchOption.AllDirectories);</div>
<div> string searchTerm = @"Visual Studio";</div>
<div> // Search the contents of each file.
 // A regular expression created with the RegEx class
 // could be used instead of the Contains method.
 // queryMatchingFiles is an IEnumerable<string>.
 var queryMatchingFiles =
 from file in fileList
 where file.Extension == ".htm"
 let fileText = GetFileText(file.FullName)
 where fileText.Contains(searchTerm)
 select file.FullName;</div>
<div> // Execute the query.
 Console.WriteLine("The term \"{0}\" was found in:", searchTerm);
 foreach (string filename in queryMatchingFiles)
 {
 Console.WriteLine(filename);
 }
<div> // Keep the console window open in debug mode.
 Console.WriteLine("Press any key to exit");
 Console.ReadKey();
 }
<div> // Read the contents of the file.
 static string GetFileText(string name)
 {
 string fileContents = String.Empty;</div>
<div> // If the file has been deleted since we took 
 // the snapshot, ignore it and return the empty string.
 if (File.Exists(name))
 {
 fileContents = System.IO.File.ReadAllText(name);
 }
 return fileContents;
 }
}

试试其它关键字

　查询文件内容　

同语言下

可能有用的

DDT贡献的其它代码(160)