C file and folder input / output stream code

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1、 Create a text file

 1 public class FileClass
 2 {
 3     public static void Main()
 4     {
 5         WriteToFile();
 6     }
 7     static void WriteToFile()
 8     {
 9         StreamWriter SW;
10         SW = File.CreateText(@"c:\MyTextFile.txt");
11         SW.WriteLine("God is greatest of them all");
12         SW.WriteLine("This is second line");
13         SW.Close();
14         Console.WriteLine("File Created SucacessFully");
15     }
16 } 

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2、 Reading documents

 1 public class FileClass
 2 {
 3     public static void Main()
 4     {
 5         ReadFromFile(@"c:\MyTextFile.txt");
 6     }
 7     static void ReadFromFile(string filename)
 8     {
 9         StreamReader SR;
10         string S;
11         SR = File.OpenText(filename);
12         S = SR.ReadLine();
13         while (S != null)
14         {
15             Console.WriteLine(S);
16             S = SR.ReadLine();
17         }
18         SR.Close();
19     }
20 }
21 
22  
23 
24 public class FileClass
25 {
26     public static void Main()
27     {
28         AppendToFile();
29     }
30     static void AppendToFile()
31     {
32         StreamWriter SW;
33         SW = File.AppendText(@"C:\MyTextFile.txt");
34         SW.WriteLine("This Line Is Appended");
35         SW.Close();
36         Console.WriteLine("Text Appended Successfully");
37     }
38 }

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3、 Additional operations

C# Additional documents

1 StreamWriter sw = File.AppendText(Server.MapPath(".")+"\\myText.txt");
2 sw.WriteLine(" Pursue ideals "); 
3 sw.WriteLine("http://www.cnblogs.com/roucheng/"); 
4 sw.WriteLine(".NET note "); 
5 sw.Flush(); 
6 sw.Close();

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C# Copy files

1 string OrignFile,NewFile; 
2 OrignFile = Server.MapPath(".")+"\\myText.txt"; 
3 NewFile = Server.MapPath(".")+"\\myTextCopy.txt";
4 File.Copy(OrignFile,NewFile,true);

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C# Delete file string delFile = Server.MapPath(“.”)+”\\myTextCopy.txt”; File.Delete(delFile);

C# Moving files

1 string OrignFile,NewFile; 
2 OrignFile = Server.MapPath(".")+"\\myText.txt"; 
3 NewFile = Server.MapPath(".")+"\\myTextCopy.txt";
4 File.Move(OrignFile,NewFile);

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C# Create directory

 1 //  Create directory c:\sixAge 
 2 DirectoryInfo d=Directory.CreateDirectory("c:\\sixAge"); 
 3 // d1 Point to c:\sixAge\sixAge1 
 4 DirectoryInfo d1=d.CreateSubdirectory("sixAge1"); 
 5 // d2 Point to c:\sixAge\sixAge1\sixAge1_1 
 6 DirectoryInfo d2=d1.CreateSubdirectory("sixAge1_1"); 
 7 //  Set the current directory to c:\sixAge 
 8 Directory.SetCurrentDirectory("c:\\sixAge"); 
 9 //  Create directory c:\sixAge\sixAge2 
10 Directory.CreateDirectory("sixAge2"); 
11 //  Create directory c:\sixAge\sixAge2\sixAge2_1 
12 Directory.CreateDirectory("sixAge2\\sixAge2_1");

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Delete folder and file recursively <%@ Page Language=C#%> <%@ Import namespace=”System.IO”%> <Script runat=server> public void DeleteFolder(string dir) { if (Directory.Exists(dir)) // If this folder exists, delete it { foreach(string d in Directory.GetFileSystemEntries(dir)) { if(File.Exists(d)) File.Delete(d); // Delete the files directly else DeleteFolder(d); // Recursively delete subfolders } Directory.Delete(dir); // Delete empty folder Response.Write(dir+” Folder deleted successfully ”); } else Response.Write(dir+” The folder does not exist ”); // If the folder does not exist, you will be prompted }

protected void Page_Load (Object sender ,EventArgs e) { string Dir=”D:\\gbook\\11″; DeleteFolder(Dir); // Call the function to delete the folder }

// ====================================================== // Implement a static method that will specify all the contents under the folder copy Go to the destination folder // If the target folder is read-only, an error will be reported . // April 18April2005 In STU // ====================================================== public static void CopyDir(string srcPath,string aimPath) { try { // Check whether the target directory ends with a directory split character. If not, add if(aimPath[aimPath.Length-1] != Path.DirectorySeparatorChar) aimPath += Path.DirectorySeparatorChar; // Determine whether the target directory exists. If not, create a new one if(!Directory.Exists(aimPath)) Directory.CreateDirectory(aimPath); // Get the file list of the source directory , It contains an array of files and directory paths // If you point to copy The file below the target file does not contain the directory. Please use the following method // string[] fileList = Directory.GetFiles(srcPath); string[] fileList = Directory.GetFileSystemEntries(srcPath); // Traverse all files and directories foreach(string file in fileList) { // First, treat it as a directory. If there is a directory, it will be recursive Copy Files under this directory if(Directory.Exists(file)) CopyDir(file,aimPath+Path.GetFileName(file)); // Otherwise directly Copy file else File.Copy(file,aimPath+Path.GetFileName(file),true); } } catch (Exception e) { MessageBox.Show (e.ToString()); } }

// ====================================================== // Implement a static method that will specify all the contents under the folder Detele // Be careful when testing , Can't recover after deleting . // April 18April2005 In STU // ====================================================== public static void DeleteDir(string aimPath) { try { // Check whether the target directory ends with a directory split character. If not, add if(aimPath[aimPath.Length-1] != Path.DirectorySeparatorChar) aimPath += Path.DirectorySeparatorChar; // Get the file list of the source directory , It contains an array of files and directory paths // If you point to Delete The file below the target file does not contain the directory. Please use the following method // string[] fileList = Directory.GetFiles(aimPath); string[] fileList = Directory.GetFileSystemEntries(aimPath); // Traverse all files and directories foreach(string file in fileList) { // First, treat it as a directory. If there is a directory, it will be recursive Delete Files under this directory if(Directory.Exists(file)) { DeleteDir(aimPath+Path.GetFileName(file)); } // Otherwise directly Delete file else { File.Delete (aimPath+Path.GetFileName(file)); } } // Delete folder System.IO .Directory .Delete (aimPath,true); } catch (Exception e) { MessageBox.Show (e.ToString()); } }

You need to reference a namespace ： using System.IO;

 1 //// <summary>
 2   ///  Copy folder ( Include subfolders ) To the specified folder , Both source and destination folders need absolute paths .  Format : CopyFolder( Source folder , Destination folder );
 3   /// </summary>
 4   /// <param name="strFromPath"></param>
 5   /// <param name="strToPath"></param>
 6 
 7   //--------------------------------------------------
 8   //http://www.cnblogs.com/roucheng/
 9  //---------------------------------------------------
10 
11   public static void CopyFolder(string strFromPath,string strToPath)
12   {
13    // If the source folder does not exist , Create 
14    if (!Directory.Exists(strFromPath))
15    {    
16     Directory.CreateDirectory(strFromPath);
17    }  
18 
19    // Get the folder name to copy 
20    string strFolderName = strFromPath.Substring(strFromPath.LastIndexOf("\\") + 1,strFromPath.Length - strFromPath.LastIndexOf("\\") - 1);  
21 
22    // If there is no source folder in the destination folder, create the source folder in the destination folder 
23    if (!Directory.Exists(strToPath + "\\" + strFolderName))
24    {    
25     Directory.CreateDirectory(strToPath + "\\" + strFolderName);
26    }
27    // Create an array to save the file name in the source folder 
28    string[] strFiles = Directory.GetFiles(strFromPath);
29 
30    // Copy the file in a loop 
31    for(int i = 0;i < strFiles.Length;i++)
32    {
33     // Get the file name of the copy , Just take the file name , Address cut off .
34     string strFileName = strFiles[i].Substring(strFiles[i].LastIndexOf("\\") + 1,strFiles[i].Length - strFiles[i].LastIndexOf("\\") - 1);
35     // Start copying files ,true Indicates overwriting a file with the same name 
36     File.Copy(strFiles[i],strToPath + "\\" + strFolderName + "\\" + strFileName,true);
37    }
38   
39    // establish DirectoryInfo example 
40    DirectoryInfo dirInfo = new DirectoryInfo(strFromPath);
41    // Get the names of all subfolders under the source folder 
42    DirectoryInfo[] ZiPath = dirInfo.GetDirectories();
43    for (int j = 0;j < ZiPath.Length;j++)
44    {
45     // Get all subfolder names 
46     string strZiPath = strFromPath + "\\" + ZiPath[j].ToString();   
47     // Treat the obtained subfolder as a new source folder , Start a new round of copies from scratch 
48     CopyFolder(strZiPath,strToPath + "\\" + strFolderName);
49    }
50   }

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