C # file operations

C#追加文件
　　　　StreamWriter sw = File.AppendText(Server.MapPath(".")+"\\myText.txt");
　　　　sw.WriteLine("追逐理想");
　　　　sw.WriteLine("kzlll");
　　　　sw.WriteLine(".NET笔记");
　　　　sw.Flush();
　　　　sw.Close();
C#拷贝文件
　　　　string OrignFile,NewFile;
　　　　OrignFile = Server.MapPath(".")+"\\myText.txt";
　　　　NewFile = Server.MapPath(".")+"\\myTextCopy.txt";
　　　　File.Copy(OrignFile,NewFile,true);
C#删除文件
　　　　string delFile = Server.MapPath(".")+"\\myTextCopy.txt";
　　　　File.Delete(delFile);
C#移动文件
　　　　string OrignFile,NewFile;
　　　　OrignFile = Server.MapPath(".")+"\\myText.txt";
　　　　NewFile = Server.MapPath(".")+"\\myTextCopy.txt";
　　　　File.Move (OrignFile, NewFile);
C # Create a directory
// Create a directory c: \ sixAge
　　　　DirectoryInfo d = Directory.CreateDirectory ( "c: \\ sixAge");
// d1 point to c: \ sixAge \ sixAge1
　　　　DirectoryInfo d1 = d .CreateSubdirectory ( "sixAge1");
// D2 point to c: \ sixAge \ sixAge1 \ sixAge1_1
　　　　DirectoryInfo D2 = d1.CreateSubdirectory ( "sixAge1_1");
// set the current directory c: \ sixAge
　　　　Directory.SetCurrentDirectory ( "c: sixAge \\ ");
// create the directory c: \ sixAge \ sixAge2
　　　　Directory.CreateDirectory (" sixAge2 ");
// create the directory c: \ sixAge \ sixAge2 \ sixAge2_1
　　　　Directory.CreateDirectory (" sixAge2 \\ sixAge2_1 ");
recursion delete folders and files

<% @ PAGELANGUAGE = C #%>
〈%@Importnamespace="System.IO"%〉
〈Scriptrunat=server〉
publicvoidDeleteFolder(stringdir)
{
if (Directory.Exists (dir)) // if
The existence of this folder deleted
{
foreach(stringdinDirectory.
GetFileSystemEntries (dir))
{
if(File.Exists(d))
File.Delete (d); // delete the files
else
DeleteFolder (d); // delete subfolders recursively
}
Directory.Delete (dir); // delete empty folders
Response.Write (dir + "folder deleted successfully");
}
else
Response.Write (dir + "The folder does not exist"); // if
Folder does not exist then the prompt
}
protectedvoidPage_Load(Object
crosses, EventArgse)
{
stringDir="D:\\gbook\\11";
DeleteFolder (Dir); // call the function to delete a folder
}
//========================================
// static method to achieve a specified folder the following copy all the contents to the destination folder below
// If the destination folder is read-only attribute will throw an error.
//========================================
publicstaticvoidCopyDir(stringsrcPath,
stringaimPath)
{
try
{
// Check if the target directory to directory split word
Break ends, if not add it
if(aimPath[aimPath.Length-1]!= Path.DirectorySeparatorChar)
aimPath+=Path.DirectorySeparatorChar;
// determine the target directory exists, if it does not exist New
if(!Directory.Exists(aimPath))Directory.CreateDirectory(aimPath);
// get the source directory of the file list,
The inside is an array that contains the file and directory path
// If you point to copy the target file the following documents
Does not contain a directory Please use the following method
//string[]fileList=Directory.GetFiles(srcPath);
string[]fileList=Directory.GetFileSystemEntries(srcPath);
// loop through all files and directories
foreach(stringfileinfileList)
{
// If there are to deal with this as a directory
Copy directories recursively the directory file
if(Directory.Exists(file))
CopyDir(file,aimPath+Path.GetFileName(file));
// Copy the file directly otherwise
else
File.Copy(file,aimPath+Path.GetFileName(file),true);
}
}
catch (Exception)
{
MessageBox.Show(e.ToString());
}
}
//========================================
// implement a static method of the specified folder below all the contents Detele
// test of time to be careful, can not be recovered after deletion.
//========================================
publicstaticvoidDeleteDir(stringaimPath)
{
try
{
// Check if the target directory to directory split word
Break ends, if not add it
if(aimPath[aimPath.Length-1]!=
Path.DirectorySeparatorChar)
aimPath+=Path.DirectorySeparatorChar;
// get the source directory of the file list,
The inside is an array that contains the file and directory path
// If you point to Delete the target file the following
File does not contain directory please use the following method
//string[]fileList=
Directory.GetFiles(aimPath);
string[]fileList=
Directory.GetFileSystemEntries(aimPath);
// loop through all files and directories
foreach(stringfileinfileList)
{
// If there are to deal with this as a directory
Recursive directory to the directory Delete the following files
if(Directory.Exists(file))
{
DeleteDir(aimPath+Path.GetFileName(file));
}
// Delete the file directly otherwise
else
{
File.Delete(aimPath+Path.GetFileName(file));
}
}
// delete a folder
System.IO.Directory.Delete(aimPath,true);
}
catch (Exception)
{
MessageBox.Show(e.ToString());
}
}
You need to reference the namespace:
usingSystem.IO;
///〈summary〉
/// Copy the folder (including subfolders) to a specified folder,
Source folder and destination folder required absolute path.
Format: CopyFolder (source folder, destination folder);
///〈/summary〉
///〈paramname="strFromPath"〉〈/param〉
///〈paramname="strToPath"〉〈/param〉
//----------------------------------------
//----------------------------------------
publicstaticvoidCopyFolder(stringstrFromPath,
stringstrToPath)
{
// If the source folder does not exist, create
if(!Directory.Exists(strFromPath))
{
Directory.CreateDirectory(strFromPath);
}
// Get the name of the folder you want to copy
stringstrFolderName=strFromPath.Substring(
strFromPath.LastIndexOf("\")+1,strFromPath.
Length-strFromPath.LastIndexOf("\")-1);
// If the file does not target the source folder source folder is created in the destination folder
if(!Directory.Exists(strToPath+"\"
+strFolderName))
{
Directory.CreateDirectory(strToPath+"\"
+strFolderName);
}
// create an array to save the source folder under the file name
string[]strFiles=Directory.GetFiles(strFromPath);
// Loop copy files
for(inti=0;i〈strFiles.Length;i++)
{
// Get a copy of the file name, just take the file name, address amputated.
stringstrFileName=strFiles[i].Substring(
strFiles[i].LastIndexOf("\")+1,
strFiles[i].Length-strFiles[i].
LastIndexOf("\")-1);
// start copying files, true representation covering the same file
File.Copy(strFiles[i],strToPath+"\"
+strFolderName+"\"+strFileName,true);
}
// Create instance DirectoryInfo
DirectoryInfodirInfo = newDirectoryInfo (
strFromPath);
// get all subfolders of the source folder under the folder name
DirectoryInfo [] ZiPath = dirInfo.GetDirectories ();
for(intj=0;j〈ZiPath.Length;j++)
{
// Get all the sub-folder name
stringstrZiPath=strFromPath+"\"+
ZiPath[j].ToString();
// get the subfolders of the folder as a new source folder,
From the beginning of a new round of copy
CopyFolder(strZiPath,strToPath+"\"+
strFolderName);
}
}

C # file operations: reading text files
1/// 〈summary〉
2 /// read a text file
3/// 〈/summary〉
4private void ReadFromTxtFile()
5{
6 if(filePath.PostedFile.
FileName != "")
7 {
8 txtFilePath =
filePath.PostedFile.FileName;
9 fileExtName =
txtFilePath.Substring(txtFilePath.
LastIndexOf(".")+1,3);
10
11 if(fileExtName !="txt" &&
fileExtName != "TXT")
12 {
13 Response.Write ( "Select Text File");
14 }
15 else
16 {
17 StreamReader fileStream =
new StreamReader(txtFilePath,Encoding.Default);
18 txtContent.Text = fileStream.ReadToEnd();
19 fileStream.Close();
20 }
21 }
22 }
C # file: Obtain the file list
1/// 〈summary〉
2 /// Gets the file list
3/// 〈/summary〉
4private void GetFileList()
5{
6 string strCurDir,FileName,FileExt;
7
8 /// File Size
9 long FileSize;
10
11 /// last modified;
12 DateTime FileModify;
13
14 /// initialization
15 if(!IsPostBack)
16 {
17 /// initialization, the default is the directory where the current page
18 strCurDir = Server.MapPath(".");
19 lblCurDir.Text = strCurDir;
20 txtCurDir.Text = strCurDir;
21 }
22 else
23 {
24 strCurDir = txtCurDir.Text;
25 txtCurDir.Text = strCurDir;
26 lblCurDir.Text = strCurDir;
27 }
28 FileInfo fi;
29 Directory info you;
30 TableCell td;
31 TableRow tr;
32 tr = new TableRow();
33
34 /// cell contents dynamically added
35 td = new TableCell();
36 td.Controls.Add(new LiteralControl(
"file name"));
37 tr.Cells.Add(td);
38 td = new TableCell();
Td.Controls.Add 39 (new new LiteralControl ( "File Types"));
40 tr.Cells.Add(td);
41 td = new TableCell();
Td.Controls.Add 42 is (the LiteralControl new new ( "file size"));
43 tr.Cells.Add(td);
44 td = new TableCell();
Td.Controls.Add 45 (the LiteralControl new new ( "last modified time"));
46 tr.Cells.Add(td);
47
48 tableDirInfo.Rows.Add(tr);
49
50 /// establish reference objects for the current directory
51 DirectoryInfo dirInfo = new DirectoryInfo( txtCurDir.Text);
52
53 /// cycle to determine the current file and directory of
54 foreach(FileSystemInfo fsi in dirInfo.
GetFileSystemInfos())
55 {
56 FileName = "";
57 FileExt = "";
58 FileSize = 0;
59
If the file is 60 ///
61 if(fsi is FileInfo)
62 {
63 fi = (FileInfo)fsi;
64
65 /// Gets file name
66 FileName = fi.Name;
67
68 /// obtain the file extension
69 FileExt = fi.Extension;
70
71 /// Gets file size
72 FileSize = fi.Length;
73
Last modified 74 /// Gets file
75 FileModify = fi.LastWriteTime;
76 }
77
78 /// otherwise directory
79 else
80 {
81 dir = (Directory Information) fsi;
82
83 /// get directory name
84 FileName = dir.Name;
85
86 /// obtain the directory last modified
87 FileModify = dir.LastWriteTime;
88
89 /// extension settings file named "Folder"
90 FileExt = "folder";
91 }
92
93 /// add dynamic table of contents
94 tr = new TableRow();
95 td = new TableCell();
96 td.Controls.Add(new LiteralControl( FileName));
97 tr.Cells.Add(td);
98 td = new TableCell();
99 td.Controls.Add(new LiteralControl( FileExt));
100 tr.Cells.Add(td);
101 td = new TableCell();
102 td.Controls.Add(new LiteralControl( FileSize.ToString()+"字节"));
103 tr.Cells.Add(td);
104 td = new TableCell();
105 td.Controls.Add(new LiteralControl( FileModify.ToString("yyyy-mm-dd hh:mm:ss")));
106 tr.Cells.Add(td);
107 tableDirInfo.Rows.Add(tr);
108 }
109}
C # file operations: reading the log file
1/// 〈summary〉
2 /// read log files
3/// 〈/summary〉
4private void ReadLogFile()
5{
6 /// to play from the specified directory open or create a form read log files
7 FileStream fs =
new FileStream(Server.MapPath("upedFile"
)+"\\logfile.txt", FileMode.OpenOrCreate,
FileAccess.Read);
8
9 /// defined output string
10 StringBuilder output = new StringBuilder();
11
12 /// length of the string is initialized 0
13 output.Length = 0;
14
15 /// file is created above to read the data stream flow creation
16 StreamReader read = new StreamReader(fs);
17
18 /// set the starting point for the beginning of the current stream file stream
19 read.BaseStream.Seek(0, SeekOrigin.Begin);
20
21 /// read the file
22 while (read.Peek() 〉 -1)
23 {
24 /// the contents of his party to take the file and line feed
25 output.Append(read.ReadLine() + "\n");
26 }
27
28 /// Close release the read data stream
29 read.Close();
30
31 /// returns the contents of the log file read
32 return output.ToString();
}
C # file operations: write to the log file
1/// 〈summary〉
2 /// written to the log file
3/// 〈/summary〉
4/// 〈param name="input"〉〈/param〉
5private void WriteLogFile(string input)
6{
7 /// directory specified log file
8 string fname = Server.MapPath("upedFile") + "\\logfile.txt";
9 /// definition file information objects
10 FileInfo finfo = new FileInfo(fname);
11
/// 12 determines whether the file exists and is greater than 2K
13 if ( finfo.Exists && finfo.Length 〉 2048 )
14 {
15 /// delete the file
16 finfo.Delete();
17 }
18 /// create a write-only file stream
19 using(FileStream fs = finfo.OpenWrite())
20 {
21 /// stream to create a write data stream based on the file created above
22 StreamWriter w = new StreamWriter(fs);
23
/// 24 disposed at the end of the write start position of the data stream as a stream file
25 w.BaseStream.Seek(0, SeekOrigin.End);
26
27 /// write "Log Entry:"
28 w.Write("\nLog Entry : ");
29
30 /// write current system time and line
31 w.Write("{0} {1} \r\n", DateTime.Now.
ToLongTimeString ()
32 DateTime.Now.ToLongDateString());
33
/// content written to the log 34 and wrap
35 w.Write(input + "\n");
36
---------------- 37 /// write "and line
38 w.Write("------------------\n");
39
40 /// empty the buffer contents, and the contents of the buffer written to the underlying stream
41 w.Flush();
42
43 /// close the write data stream
44 w.Close();
45 }
46}
C # file: Create an HTML file
1/// 〈summary〉
2 // Create an HTML file
3/// 〈/summary〉
4private void CreateHtmlFile()
5{
/// The number of defined and consistent 6 html tag array
7 string[] newContent = new string[5];
8 StringBuilder strhtml =
new StringBuilder();
9 try
10 {
11 /// create StreamReader object
12 using (StreamReader sr =
new StreamReader(Server.MapPath("createHTML") + "\\template.html"))
13 {
14 String oneline;
15
16 /// read the specified HTML file template
17 while ((oneline = sr.ReadLine())
!= null)
18 {
19 strhtml.Append(oneline);
20 }
21 sr.Close();
22 }
23 }
24 catch(Exception err)
25 {
26 /// output abnormality information
27 Response.Write(err.ToString());
28 }
29 /// marked array assignment
30 newContent [0] = txtTitle.Text; // title
31 newContent [1] = "BackColor = '# cccfff'"; // background color
32 newContent [2] = "# ff0000"; // font color
33 newContent [3] = "100px"; // Font Size
34 newContent [4] = txtContent.Text; // main content
35
36 /// generated html file according to the new content of the above
37 try
38 {
39 /// Specifies the generated HTML file
40 string fname = Server.MapPath( "createHTML") +"\" + DateTime.Now.ToString(
"yyyymmddhhmmss") + ".html";
41
42 /// replace html template file is marked as new content
43 for(int i=0;i 〈 5;i++)
44 {
45 strhtml.Replace("$htmlkey["+i+"]",newContent[i]);
46 }
47 // create an object file information
48 FileInfo finfo = new FileInfo(fname);
49
50 // Create a file stream in the form of open or write
51 using(FileStream fs = finfo.OpenWrite())
52 {
53 /// stream to create a write data stream based on the file created above
54 StreamWriter sw = new StreamWriter(fs,System.
Text.Encoding.GetEncoding("GB2312"));
55
56 /// HTML pages to create new content written in
57 sw.WriteLine(strhtml);
58 sw.Flush();
59 sw.Close();
60 }
61
62 /// set the hyperlink property
63 hyCreateFile.Text = DateTime.Now.ToString("yyyymmddhhmmss")+".html";
64 hyCreateFile.NavigateUrl = "
createHTML/"+DateTime.Now.ToString(" yyyymmddhhmmss")+".html";65 }
66 catch(Exception err)
67 {
68 Response.Write (err.ToString());
69 }
}

CreateDirectory方法的使用
using System;
using System.IO;

class Test
{
　　public static void Main()
　　{
　　　　// Specify the directory you want to manipulate.
　　　　string path = @"c:\MyDir";

　　　　try
　　　　{
　　　　　　// Determine whether the directory exists.
　　　　　　if (Directory.Exists(path))
　　　　　　{
　　　　　　　　Console.WriteLine("That path exists already.");
　　　　　　　　return;
　　　　　　}

　　　　　　// Try to create the directory.
　　　　　　DirectoryInfo di = Directory.CreateDirectory(path);
　　　　　　Console.WriteLine("The directory was created successfully at {0}.", Directory.GetCreationTime(path));

　　　　　　// Delete the directory.
　　　　　　di.Delete();
　　　　　　Console.WriteLine("The directory was deleted successfully.");
　　　　}
　　　　catch (Exception e)
　　　　{
　　　　　　Console.WriteLine("The process failed: {0}", e.ToString());
　　　　}
　　　　finally {}
　　}
}

C # modify the file or folder name

Reference documentation, made a demo, move () method is actually renamed; In addition, the use of moveto DirectoryInfo is achievable.

sourceCode：

string srcFileName = @"D:/a.txt";
string destFileName = @"D:/b.txt";

string srcFolderPath = @"D:/1";
string destFolderPath = @"D:/6";

//方法一
if (System.IO.File.Exists(srcFileName))
{
System.IO.File.Move(srcFileName, destFileName);
}
if (System.IO.Directory.Exists(srcFolderPath))
{
System.IO.Directory.Move(srcFolderPath, destFolderPath);
}

//方法二
if (System.IO.File.Exists(srcFileName))
{
System.IO.FileInfo file = new System.IO.FileInfo(srcFileName);
file.MoveTo(destFileName);
}
if (System.IO.Directory.Exists(srcFolderPath))
{
System.IO.DirectoryInfo folder = new System.IO.DirectoryInfo(srcFolderPath);
folder.MoveTo(destFolderPath);
}

Transfer from https://www.cnblogs.com/Zero0602/p/6961656.html

C # modify the file or folder name

Reference documentation, made a demo, move () method is actually renamed; In addition, the use of moveto DirectoryInfo is achievable.

sourceCode：

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