.NET Core 文件 文件夾操作
/// <summary>
/// 文件夾 文件管理
///
/// 會有一些在開發環境/測試環境/生產環境 不同，
/// 數據庫連接--路徑--開關
/// 配置文件：不用改代碼編譯
///
/// 配置路徑：絕對路徑
/// 相對路徑 / 然后拼裝
/// 相當於應用程序所在路徑
///
/// 配置文件最好有個集中管理的類，因為在線項目中，肯定多人合作
///
///
/// </summary>
public class MyIO
{
/// <summary>
/// 配置絕對路徑
/// </summary>
private static string LogPath = ConfigurationManager.GetConfig("LogPath");
private static string LogMovePath = ConfigurationManager.GetConfig("LogMovePath");
/// <summary>
/// 獲取當前程序路徑
/// </summary>
private static string LogPath2 = AppDomain.CurrentDomain.BaseDirectory;
/// <summary>
/// 讀取文件夾 文件信息
/// </summary>
public static void Show()
{
{//check
//這是操作文件、文件夾必備
if (!Directory.Exists(LogPath))//檢測文件夾是否存在
{
}
DirectoryInfo directory = new DirectoryInfo(LogPath);//對文件夾、文件的描述對象、不存在不報錯 注意exists屬性
Console.WriteLine(string.Format("{0} {1} {2}", directory.FullName, directory.CreationTime, directory.LastWriteTime));
//路徑拼接，得到一個完整的路徑
if (!File.Exists(Path.Combine(LogPath, "info.txt")))
{
}
FileInfo fileInfo = new FileInfo(Path.Combine(LogPath, "info.txt"));
Console.WriteLine(string.Format("{0} {1} {2}", fileInfo.FullName, fileInfo.CreationTime, fileInfo.LastWriteTime));
}
{//Directory
if (!Directory.Exists(LogPath))
{
DirectoryInfo directoryInfo = Directory.CreateDirectory(LogPath);//一次性創建全部的子路徑
Directory.Move(LogPath, LogMovePath);//移動 原文件夾就不在了
Directory.Delete(LogMovePath);//刪除
}
}
{//File
string fileName = Path.Combine(LogPath, "log.txt");
string fileNameCopy = Path.Combine(LogPath, "logCopy.txt");
string fileNameMove = Path.Combine(LogPath, "logMove.txt");
bool isExists = File.Exists(fileName);
if (!isExists)
{
Directory.CreateDirectory(LogPath);//創建了文件夾之后，才能創建里面的文件
using (FileStream fileStream = File.Create(fileName))//打開文件流 （創建文件並寫入）
{
string name = "12345567778890";
byte[] bytes = Encoding.Default.GetBytes(name);
fileStream.Write(bytes, 0, bytes.Length);
fileStream.Flush();
}
using (FileStream fileStream = File.Create(fileName))//打開文件流 （創建文件並寫入）
{
StreamWriter sw = new StreamWriter(fileStream);
sw.WriteLine("1234567890");
sw.Flush();
}
using (StreamWriter sw = File.AppendText(fileName))//流寫入器（創建/打開文件並寫入）
{
string msg = "1234567890";
sw.WriteLine(msg);
sw.Flush();
}
using (StreamWriter sw = File.AppendText(fileName))//流寫入器（創建/打開文件並寫入）
{
string name = "0987654321";
byte[] bytes = Encoding.Default.GetBytes(name);
sw.BaseStream.Write(bytes, 0, bytes.Length);
sw.Flush();
}
//文件的讀取
foreach (string result in File.ReadAllLines(fileName))//讀取文件中所有的行信息
{
Console.WriteLine(result);
}
string sResult = File.ReadAllText(fileName);
Byte[] byteContent = File.ReadAllBytes(fileName);
string sResultByte = System.Text.Encoding.UTF8.GetString(byteContent);
//建議大家不要去做多線程讀取，即使要多線程讀取，也要加鎖，加鎖----反多線程；
//你們有沒有遇到過大文件Txt---10G
using (FileStream stream = File.OpenRead(fileName))//分批讀取
{
int length = 5;
int result = 0;
do
{
byte[] bytes = new byte[length];
result = stream.Read(bytes, 0, 5);
for (int i = 0; i < result; i++)
{
Console.WriteLine(bytes[i].ToString());
}
}
while (length == result);
}
File.Copy(fileName, fileNameCopy);
File.Move(fileName, fileNameMove);
File.Delete(fileNameCopy);
File.Delete(fileNameMove);//盡量不要delete
}
}
{//DriveInfo
DriveInfo[] drives = DriveInfo.GetDrives();//獲取當前計算機所有盤符
foreach (DriveInfo drive in drives)
{
if (drive.IsReady)
Console.WriteLine("類型：{0} 卷標：{1} 名稱：{2} 總空間：{3} 剩余空間：{4}", drive.DriveType, drive.VolumeLabel, drive.Name, drive.TotalSize, drive.TotalFreeSpace);
else
Console.WriteLine("類型：{0} is not ready", drive.DriveType);
}
}
{
Console.WriteLine(Path.GetDirectoryName(LogPath)); //返回目錄名，需要注意路徑末尾是否有反斜杠對結果是有影響的
Console.WriteLine(Path.GetDirectoryName(@"d:\\abc")); //將返回 d:\
Console.WriteLine(Path.GetDirectoryName(@"d:\\abc\"));// 將返回 d:\abc
Console.WriteLine(Path.GetRandomFileName());//將返回隨機的文件名
Console.WriteLine(Path.GetFileNameWithoutExtension("d:\\abc.txt"));// 將返回abc
Console.WriteLine(Path.GetInvalidPathChars());// 將返回禁止在路徑中使用的字符
Console.WriteLine(Path.GetInvalidFileNameChars());//將返回禁止在文件名中使用的字符
Console.WriteLine(Path.Combine(LogPath, "log.txt"));//合並兩個路徑
}
}
/// <summary>
/// 1 try catch旨在上端使用，保證對用戶的展示
/// 2 下端不要吞掉異常，隱藏錯誤是沒有意義的,抓住再throw也沒意義
/// 3 除非這個異常對流程沒有影響或者你要單獨處理這個異常
/// </summary>
/// <param name="msg"></param>
public static void Log(string msg)
{
StreamWriter sw = null;
try
{
string fileName = "log.txt";
string totalPath = Path.Combine(LogPath, fileName);
if (!Directory.Exists(LogPath))
{
Directory.CreateDirectory(LogPath);
}
sw = File.AppendText(totalPath);
sw.WriteLine(string.Format("{0}:{1}", DateTime.Now, msg));
sw.WriteLine("***************************************************");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);//log
//throw ex;
//throw new exception("這里異常");
}
finally
{
if (sw != null)
{
sw.Flush();
sw.Close();
sw.Dispose();
}
}
}
}