1 using System;  2 using System.Text;  3 using System.IO;  4   5 namespace XXXX.Common  6 {  7     /// <summary>  8     /// 文本文件从磁盘读取、写入  9     /// </summary> 10     public class FileHelper 11     {        12  13         /// <summary> 14         /// 从文件中读取文本内容 15         /// </summary> 16         /// <param name="filePath">文本路径</param> 17         /// <returns>返回文件中的内容</returns> 18         public static string Read(string filePath) 19         { 20             string result = string.Empty; 21             if (File.Exists(filePath)) 22             { 23                 using (StreamReader sr = new StreamReader(filePath, Encoding.Default)) 24                 { 25                     result = sr.ReadToEnd(); 26                     sr.Close(); 27                     return result; 28                 } 29             } 30             return result; 31         } 32  33         /// <summary> 34         /// 写入文本文件，按默认编码 35         /// </summary> 36         /// <param name="filePath">文本文件路径包括文件名</param> 37         /// <param name="content">写入内容</param> 38         public static void Write(string filePath, string content) 39         { 40             using (StreamWriter sw = new StreamWriter(filePath, false, Encoding.Default)) 41             { 42                 sw.Write(content); 43                 sw.Close(); 44             } 45         } 46         /// <summary> 47         /// 写入文本文件，以UFT8格式编码 48         /// </summary> 49         /// <param name="filePath">文本文件路径包括文件名</param> 50         /// <param name="content">写入内容</param> 51         /// <param name="UTF8"></param> 52         public static void Write(string filePath, string content, bool UTF8) 53         { 54             using (StreamWriter sw = new StreamWriter(filePath, false, Encoding.UTF8)) 55             { 56                 sw.Write(content); 57                 sw.Close(); 58             } 59         } 60  61         /// <summary> 62         /// 备份文件 63         /// </summary> 64         /// <param name="sourceFileName">源文件路径</param> 65         /// <param name="destFileName">目标文件路径</param> 66         /// <param name="overwrite">是否覆盖已存在文件</param> 67         /// <returns></returns> 68         public static bool BackupFile(string sourceFileName, string destFileName, bool overwrite) 69         { 70             bool flag; 71             if (!File.Exists(sourceFileName)) 72             { 73                 throw new FileNotFoundException(sourceFileName + "文件不存在！"); 74             } 75             if (!overwrite && File.Exists(destFileName)) 76             { 77                 return false; 78             } 79             try 80             { 81                 File.Copy(sourceFileName, destFileName, true); 82                 flag = true; 83             } 84             catch (Exception exception) 85             { 86                 throw exception; 87             } 88             return flag; 89         } 90  91         /// <summary> 92         /// 拷贝文件夹文件 93         /// </summary> 94         /// <param name="srcDir"></param> 95         /// <param name="dstDir"></param> 96         public static void CopyDirFiles(string srcDir, string dstDir) 97         { 98             if (Directory.Exists(srcDir)) 99             {100                 foreach (string str in Directory.GetFiles(srcDir))101                 {102                     string destFileName = Path.Combine(dstDir, Path.GetFileName(str));103                     File.Copy(str, destFileName, true);104                 }105 106                 foreach (string str3 in Directory.GetDirectories(srcDir))107                 {108                     string str4 = str3.Substring(str3.LastIndexOf(@"\") + 1);109                     CopyDirFiles(Path.Combine(srcDir, str4), Path.Combine(dstDir, str4));110                 }111             }112         }113 114         /// <summary>115         /// 删除文件夹文件116         /// </summary>117         /// <param name="dir"></param>118         public static void DeleteDirFiles(string dir)119         {120             if (Directory.Exists(dir))121             {122                 foreach (string str in Directory.GetFiles(dir))123                 {124                     File.Delete(str);125                 }126                 foreach (string str2 in Directory.GetDirectories(dir))127                 {128                     Directory.Delete(str2, true);129                 }130             }131         }132 133         /// <summary>134         /// 获得文件最后修改时间135         /// </summary>136         /// <param name="file"></param>137         /// <returns></returns>138         public static DateTime GetFileLastWriteTime(string file)139         {140             if (File.Exists(file))141             {142                 return File.GetLastWriteTime(file);143             }144             return DateTime.MaxValue;145         }146 147         /// <summary>148         /// 取消文件的只读属性149         /// </summary>150         /// <param name="file"></param>151         public static void RemoveFileReadOnlyAttribute(string file)152         {153             File.SetAttributes(file, File.GetAttributes(file) & ~FileAttributes.ReadOnly);154         }         155     }156 }