場景

C#中File類的常用讀取與寫入文件方法的使用：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/99693983

注：

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https://blog.csdn.net/badao_liumang_qizhi
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實現

獲取文件的擴展名

??????? /// <summary>/// 獲取文件的擴展名/// </summary>/// <param name="filename">完整文件名</param>/// <returns>返回擴展名</returns>public static string GetPostfixStr(string filename){int num = filename.LastIndexOf(".");int length = filename.Length;return filename.Substring(num, length - num);}

讀取文件內容

??????? /// <summary>/// 讀取文件內容/// </summary>/// <param name="path">要讀取的文件路徑</param>/// <returns>返回文件內容</returns>public static string ReadFile(string path){string result;if (!System.IO.File.Exists(path)){result = "不存在相應的目錄";}else{System.IO.FileStream stream = new System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);System.IO.StreamReader streamReader = new System.IO.StreamReader(stream, System.Text.Encoding.Default);result = streamReader.ReadToEnd();streamReader.Close();streamReader.Dispose();}return result;}

指定編碼格式讀取文件內容

??????? /// <summary>/// 讀取文件內容/// </summary>/// <param name="path">要讀取的文件路徑</param>/// <param name="encoding">編碼格式</param>/// <returns>返回文件內容</returns>public static string ReadFile(string path, System.Text.Encoding encoding){string result;if (!System.IO.File.Exists(path)){result = "不存在相應的目錄";}else{System.IO.FileStream stream = new System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);System.IO.StreamReader streamReader = new System.IO.StreamReader(stream, encoding);result = streamReader.ReadToEnd();streamReader.Close();streamReader.Dispose();}return result;}

向指定文件寫入內容

??????? /// <summary>/// 向指定文件寫入內容/// </summary>/// <param name="path">要寫入內容的文件完整路徑</param>/// <param name="content">要寫入的內容</param>public static void WriteFile(string path, string content){try{object obj = new object();if (!System.IO.File.Exists(path)){System.IO.FileStream fileStream = System.IO.File.Create(path);fileStream.Close();}lock (obj){using (System.IO.StreamWriter streamWriter = new System.IO.StreamWriter(path, false, System.Text.Encoding.Default)){streamWriter.WriteLine(content);streamWriter.Close();streamWriter.Dispose();}}}catch (System.Exception ex){ICSharpCode.Core.LoggingService<FileHelper>.Error(String.Format("寫入文件{0}異常:{1}", path, ex.Message), ex);}}

指定編碼格式向文件寫入內容

??????? /// <summary>/// 向指定文件寫入內容/// </summary>/// <param name="path">要寫入內容的文件完整路徑</param>/// <param name="content">要寫入的內容</param>/// <param name="encoding">編碼格式</param>public static void WriteFile(string path, string content, System.Text.Encoding encoding){try{object obj = new object();if (!System.IO.File.Exists(path)){System.IO.FileStream fileStream = System.IO.File.Create(path);fileStream.Close();}lock (obj){using (System.IO.StreamWriter streamWriter = new System.IO.StreamWriter(path, false, encoding)){streamWriter.WriteLine(content);streamWriter.Close();streamWriter.Dispose();}}}catch (System.Exception ex){ICSharpCode.Core.LoggingService<FileHelper>.Error(String.Format("寫入文件{0}異常:{1}", path, ex.Message), ex);}}

文件復制

??????? /// <summary>/// 文件復制/// </summary>/// <param name="orignFile">源文件完整路徑</param>/// <param name="newFile">目標文件完整路徑</param>public static void FileCoppy(string orignFile, string newFile){System.IO.File.Copy(orignFile, newFile, true);}

文件刪除

??????? /// <summary>/// 刪除文件/// </summary>/// <param name="path">要刪除的文件的完整路徑</param>public static void FileDel(string path){System.IO.File.Delete(path);}

文件移動

??????? /// <summary>/// 文件移動（剪貼->粘貼）/// </summary>/// <param name="orignFile">源文件的完整路徑</param>/// <param name="newFile">目標文件完整路徑</param>public static void FileMove(string orignFile, string newFile){System.IO.File.Move(orignFile, newFile);}

判斷一組文件是否都存在

???

???? /// <summary>/// 判斷一組文件是否都存在/// </summary>/// <param name="filePathList">文件路徑List</param>/// <returns>文件是否全部存在</returns>public static bool IsFilesExist(List<string> filePathList){bool isAllExist = true;foreach(string filePath in filePathList){if(!File.Exists(filePath)){isAllExist = false;}}return isAllExist;}

創建目錄

??????? /// <summary>/// 創建目錄/// </summary>/// <param name="orignFolder">當前目錄</param>/// <param name="newFloder">要創建的目錄名</param>public static void FolderCreate(string orignFolder, string newFloder){System.IO.Directory.SetCurrentDirectory(orignFolder);System.IO.Directory.CreateDirectory(newFloder);}

刪除目錄

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?????? /// <summary>/// 刪除目錄/// </summary>/// <param name="dir">要刪除的目錄</param>public static void DeleteFolder(string dir){if (System.IO.Directory.Exists(dir)){string[] fileSystemEntries = System.IO.Directory.GetFileSystemEntries(dir);for (int i = 0; i < fileSystemEntries.Length; i++){string text = fileSystemEntries[i];if (System.IO.File.Exists(text)){System.IO.File.Delete(text);}else{FileHelper.DeleteFolder(text);}}System.IO.Directory.Delete(dir);}}

目錄內容復制

??????? /// <summary>/// 目錄內容復制/// </summary>/// <param name="srcPath">源目錄</param>/// <param name="aimPath">目標目錄</param>public static void CopyDir(string srcPath, string aimPath){try{if (aimPath[aimPath.Length - 1] != System.IO.Path.DirectorySeparatorChar){aimPath += System.IO.Path.DirectorySeparatorChar;}if (!System.IO.Directory.Exists(aimPath)){System.IO.Directory.CreateDirectory(aimPath);}string[] fileSystemEntries = System.IO.Directory.GetFileSystemEntries(srcPath);string[] array = fileSystemEntries;for (int i = 0; i < array.Length; i++){string text = array[i];if (System.IO.Directory.Exists(text)){FileHelper.CopyDir(text, aimPath + System.IO.Path.GetFileName(text));}else{System.IO.File.Copy(text, aimPath + System.IO.Path.GetFileName(text), true);}}}catch (System.Exception ex){throw new System.Exception(ex.ToString());}}

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總結

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