操作文件夹的类：Directory，需要引用的命名空间：using System.IO;
例：
class Program
{
static void Main(string[] args)
{
String str=@"D:\temp";
Directory.CreateDirectory(str);//创建文件夹
if (Directory.Exists(str))//判断是否存在
{
Console.WriteLine("存在temp文件夹");
}
Directory.Delete(str);//删除文件夹
}
}
获取文件夹下的所有文件：
static void Main(string[] args)
{
string[] files = Directory.GetFiles("D:\\360驱动大师目录\\驱动备份目录");
foreach (string file in files)//去除文件的路径
{
int idx = file.LastIndexOf(@"\");
string temp = file.Substring(idx + 1, file.Length - idx - 1);
Console.WriteLine(temp);
}
foreach (string file in files)//显示文件的路径
{
Console.WriteLine(file);
}
}
使用FileInfo类获取文件信息：
string[] files = Directory.GetFiles("D:\\360驱动大师目录\\驱动备份目录");
foreach (string file in files)//去除文件的路径
{
FileInfo info = new FileInfo(file);
string tmp = info.Name;
Console.WriteLine(tmp+" "+info.Length/1024);
}
获取文件夹中子目录的名字：
string[] dirs = Directory.GetDirectories("D:\\360驱动大师目录");
foreach (string dir in dirs)
{
Console.WriteLine(dir);
}
File文件类。
创建文件用：File.Create(@"D:\ite.txt");
复制文件：File.Copy(@"D:\ite.txt", @"E:\aa.txt");
删除文件：File.Delete；
剪贴文件：File.More;
判断文件是否存在：File.Exists;
创建一个文件并向里面填写内容：
FileStream fs = new FileStream(@"D:\ite.txt", FileMode.OpenOrCreate);
StreamWriter writer = new StreamWriter(fs);
writer.WriteLine("uhuirhiuheriuhiuerhiu");
writer.Close();
fs.Close();
读取文件的内容：
FileStream fs = new FileStream(@"D:\ite.txt", FileMode.OpenOrCreate);
StreamReader reader = new StreamReader(fs);
string line = "";
while ((line = reader.ReadLine()) != null)
{
Console.WriteLine(line);
}
reader.Close();
fs.Close();
对二进制文件的写操作：
FileStream fs = new FileStream(@"D:\it.txt", FileMode.OpenOrCreate|FileMode.Append);//打开创建或追加
BinaryWriter writer = new BinaryWriter(fs);
writer.Write("asgdiufhdsaiuhfoiuahss");
writer.Close();
fs.Close();
对二进制文件的读操作：
FileStream fs = new FileStream(@"D:\it.txt", FileMode.OpenOrCreate|FileMode.Append);//打开创建或追加
BinaryReader reader = new BinaryReader(fs);
char[] bt = new char[fs.Length];
reader.Read(bt, 0, (int)fs.Length);
string aa = new string(bt);
Console.WriteLine(aa);
reader.Close();
fs.Close();
例：多线程删除文件和文件夹（使用于大数量的文件和文件夹）
using System;
转存失败重新上传取消using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Threading;
namespace DeleteDir
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
/// <summary>
/// 选择按钮 选择要删除的文件夹
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnSelect_Click(object sender, EventArgs e)
{
FolderBrowserDialog fbdDialog = new FolderBrowserDialog();//创建FolderBrowserDialog对象
if (fbdDialog.ShowDialog() == DialogResult.OK)
{
txtPath.Text = fbdDialog.SelectedPath;
}
}
private void btnDel_Click(object sender, EventArgs e)
{
DirectoryInfo dirInfo = new DirectoryInfo(txtPath.Text.Trim());
DirectoryInfo[] dirAtt = dirInfo.GetDirectories();//获取文件夹下所有的文件夹
int dirAttLength = dirAtt.Length;
for (int i = 0; i < dirAttLength; i++)
{
Thread[] that = new Thread[dirAttLength];
DirDelete dt = new DirDelete();
dt.DicInfo = dirAtt[i];
that[i] = new Thread(dt.Delete);
that[i].Name = "th" + i;
that[i].IsBackground = true;
that[i].Start();
}
if (dirAtt.Length == 0)
{
DirDelete dt = new DirDelete();
dt.DicInfo = dirInfo;
Thread that = new Thread(dt.Delete);
that.IsBackground = true;
that.Start();
}
}
}
public class DirDelete {
public DirectoryInfo DicInfo { get; set; }
public void Delete()
{
DeleteFileAndDirectory(DicInfo);
}
private void DeleteFileAndDirectory(DirectoryInfo info)
{
if (info.Exists == false){return;}
DirectoryInfo[] childDir=info.GetDirectories();
foreach (DirectoryInfo newInfo in childDir)
{
DeleteFileAndDirectory(newInfo);
}
foreach (FileInfo file in info.GetFiles())
{
if (file.Exists)
{
file.Attributes = FileAttributes.Normal;//防止文件受保护不能删除
file.Delete();
}
}
if (info.Exists)
{
info.Attributes = FileAttributes.Normal;
info.Delete();
}
}
}
}
