using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
namespace Example
{
class Program
{
static void Main(string[] args)
{
//////////////// File open The following code opens D:\wang.txt File, and write to the file "hello"
FileStream textFile = File.Open(@"D:\wang.txt", FileMode.Append);// In order to Append Mode to open the file (if it does not exist, it will be created)
byte[] info = { (byte)'h', (byte)'e', (byte)'l', (byte)'l', (byte)'o' };// The information to write
textFile.Write(info, 0, info.Length);//Write Method can only write byte An array of
textFile.Close();// Close file stream
////////////////////// File creation
FileStream newText = File.Create(@"D:\newText.txt");// Create a file
newText.Close();// Close the file
//////////////////// Delete the file
File.Delete(@"d:\newText.txt");
////////////////// Copying files If the target file exists, replication is not allowed )
//File.Copy(@"d:\wang.txt", @"d:\CopyWang.txt");
//////////////// Move files Only in the same 1 Intraday movement If the target path is incorrect, it cannot be moved
// File.Move(@"d:\CopyWang.txt", @"D:\A\movewang.txt");
//////////////////////// Set the file property to Read only, hide
//File.SetAttributes(@"D:\copywang.txt", FileAttributes.ReadOnly | FileAttributes.Hidden);// Satisfy more than one property at a time, must use bit or (|).
/////////////// Determine if the file exists
if (File.Exists(@"D:\copywang.txt"))// If there is Even hidden files can be found
{
File.SetAttributes(@"D:\copywang.txt", FileAttributes.ReadOnly);// After resetting the properties, the hidden files will also be displayed, as long as they are not added Hidden attribute
Console.WriteLine(" Find the file copywang.txt");
}
else
{
Console.WriteLine(" No file found CopyWang.txt");
}
/*
In addition, File Class for Text The text provides more support.
?AppendText : appends text to an existing file
?CreateText : creates or opens a new file for writing text
?OpenText : opens an existing text file for reading
But the above method is mainly correct UTF-8 Is not flexible enough to manipulate the encoded text. The following code pairs are recommended for the reader here txt The file is manipulated.
? right txt File to "read" operation, sample code as follows:
*/
StreamReader textReader = new StreamReader(@"D:\wang.txt", System.Text.Encoding.Default);// Open the file with the default encoding
string str = textReader.ReadToEnd();// Read the file
Console.WriteLine(" use StreamReader Read the text content :" + str);
textReader.Close();
////////////////// right txt File write content
StreamWriter textWriter = new StreamWriter(@"D:\wang.txt");
str = "Learn .Net";
textWriter.Write(str);
textWriter.Close();
/*
System.IO.Directory Classes and System.DirectoryInfo class
It mainly provides various operations about the directory, which need to be referenced when used System.IO Namespace. The main properties and methods are described below through a program example.
*/
Directory.CreateDirectory(@"D:\wang1\wang");// Create a directory (folder) if it already exists, keep it ; You can also 1 Create multiple levels of directories
///////////////////////////////// Directory property setting method
DirectoryInfo dirInfo = new DirectoryInfo(@"D:\wang1\wang");//
dirInfo.Attributes = FileAttributes.Hidden;// | FileAttributes.ReadOnly;// Set folder properties
/////////////////Delete Methods the first 2 The parameters for bool Type, which can decide whether to delete a non-empty directory.
// If the parameter value is true , will delete the entire directory, even if there are files or subdirectories under the directory; if false , can be deleted only if the directory is empty.
//Directory.Delete(@"D:\wang1", true);// If the file is set to ReadOnly, You can't delete it
//Directory.Move(@"d:\wang1", @"d:\wang3");// The folder wang1 Move to folder wang3 In the , Is equivalent to wang1 Delete, create 1 a wang3 And then move the content to wang3
string[] Directories = Directory.GetDirectories(@"D:\wang3");// Get folder wang3 The directory where the
foreach (string var in Directories)
Console.WriteLine(var);
string[] Files = Directory.GetFiles(@"D:\wang1");// Get folder wang1 All the files below
foreach (string var in Files)
Console.WriteLine(var);
if (Directory.Exists(@"D:\wang1"))
Console.WriteLine(" folder wang1 There are ");
/*
in C# In the " \ "Is a special character that needs to be used to represent it." \\ ". Because it's not a convenient way to write it, C# Language provides @ Let's simplify it. Just put it in front of the string @ Can be used directly." \ ".
So the path up here is C# Where should be expressed as" Book ", @ " \Tmp\Book ", @ " C:\Tmp\Book ".
*/
Console.ReadLine();
}
}
}