C#：文本文件读写操作 FileHelper-白红宇

C#：文本文件读写操作 FileHelper

阅读量：6345 次

发布时间：2019-06-22

本文共 2511 字，大约阅读时间需要 8 分钟。

1     public class FileHelper 2     { 3         ///  4         /// 获取指定路径下所有文件 5         /// 
         6         public static List
     
       GetFiles(string path) 7         {             8             //using System.IO; 9             if (!Directory.Exists(path))  //路径不存在10                 return null;           11             List
      
        result = new List
       
        ();            12             DirectoryInfo dir = new DirectoryInfo(path);            13             DirectoryInfo[] subfolder = dir.GetDirectories();14             if (subfolder != null&&subfolder.Length>0)15             {16                 foreach(DirectoryInfo item in subfolder)17                 {                    18                     List
        
          subFiles = GetFiles(item.FullName);  //FullName:完整路径19                     if (subFiles != null && subFiles.Count > 0)20                         result.AddRange(subFiles);21                 }22             }23             FileInfo[] files = dir.GetFiles();24             if(files!=null)25             {26                 foreach(FileInfo file in files)27                 {28                     result.Add(file.FullName);29                 }30             }31             return result;32         }33 34         /// 
         35         /// 获取指定文件内容36         /// 注：这里适用于读取文本类型文件37         /// 
38         public static List
         
           GetTxtFileContent(string fileName)39         {40             if (!File.Exists(fileName)) //文件不存在41                 return null;42             FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);43             StreamReader reader = new StreamReader(fs, Encoding.Default);44             List
          
            result = new List
           
            ();45 string line = "";46 while((line=reader.ReadLine())!=null)47 {48 result.Add(line);49 }50 reader.Close();51 fs.Close();52 return result; 53 } 54 55 /// 
            56 /// 删除指定文件57 /// 
 58 public static void DeleteFile(string fileName)59 {60 File.Delete(fileName);61 }62 63 /// 
            64 /// 创建文件65 /// 
66 /// 
            文件全路径67 /// 
            写入内容68 public static void CreateFile(string fileName,List
            
              content=null)69 {70 if(!File.Exists(fileName))71 {72 FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write);73 if (content != null && content.Count > 0)74 {75 StreamWriter sw = new StreamWriter(fs);76 foreach (string line in content)77 {78 sw.WriteLine(line);79 }80 sw.Close();81 }82 fs.Close();83 } 84 }85 86 }