C#一个文件相关操作的工具类

  1 public class FileOperateHelp
  2     {
  3         #region 01.写文件(.txt-覆盖)
  4         /// <summary>
  5         /// 写文件(覆盖源文件内容)
  6         /// 文件不存在的话自动创建
  7         /// </summary>
  8         /// <param name="FileName">文件路径(web里相对路径,控制台在根目录下写)</param>
  9         /// <param name="Content">文件内容</param>
 10         public static string Write_Txt(string FileName, string Content)
 11         {
 12             try
 13             {
 14                 Encoding code = Encoding.GetEncoding("gb2312");
 15                 string htmlfilename = FileOperateHelp.PathConvert(FileName);
 16                 //string htmlfilename = HttpContext.Current.Server.MapPath(FileName + ".txt");　//保存文件的路径
 17                 string str = Content;
 18                 StreamWriter sw = null;
 19                 {
 20                     try
 21                     {
 22                         sw = new StreamWriter(htmlfilename, false, code);
 23                         sw.Write(str);
 24                         sw.Flush();
 25                     }
 26                     catch { }
 27                 }
 28                 sw.Close();
 29                 sw.Dispose();
 30                 return "ok";
 31             }
 32             catch (Exception ex)
 33             {
 34 
 35                 return ex.Message;
 36             }
 37 
 38         }
 39         #endregion
 40 
 41         #region 02.读文件(.txt)
 42         /// <summary>
 43         /// 读文件
 44         /// </summary>
 45         /// <param name="filename">文件路径(web里相对路径,控制台在根目录下写)</param>
 46         /// <returns></returns>
 47         public static string Read_Txt(string filename)
 48         {
 49 
 50             try
 51             {
 52                 Encoding code = Encoding.GetEncoding("gb2312");
 53                 string temp = FileOperateHelp.PathConvert(filename);
 54                 //  string temp = HttpContext.Current.Server.MapPath(filename + ".txt");
 55                 string str = "";
 56                 if (File.Exists(temp))
 57                 {
 58                     StreamReader sr = null;
 59                     try
 60                     {
 61                         sr = new StreamReader(temp, code);
 62                         str = sr.ReadToEnd(); // 读取文件
 63                     }
 64                     catch { }
 65                     sr.Close();
 66                     sr.Dispose();
 67                 }
 68                 else
 69                 {
 70                     str = "";
 71                 }
 72                 return str;
 73             }
 74             catch (Exception ex)
 75             {
 76 
 77                 return ex.Message;
 78             }
 79         }
 80         #endregion
 81 
 82         #region 03.写文件（.txt-添加）
 83         /// <summary>
 84         /// 写文件
 85         /// </summary>
 86         /// <param name="FileName">文件路径(web里相对路径,控制台在根目录下写)</param>
 87         /// <param name="Strings">文件内容</param>
 88         public static string WriteFile(string FileName, string Strings)
 89         {
 90             try
 91             {
 92                 string Path = FileOperateHelp.PathConvert(FileName);
 93 
 94                 if (!System.IO.File.Exists(Path))
 95                 {
 96                     System.IO.FileStream f = System.IO.File.Create(Path);
 97                     f.Close();
 98                     f.Dispose();
 99                 }
100                 System.IO.StreamWriter f2 = new System.IO.StreamWriter(Path, true, System.Text.Encoding.UTF8);
101                 f2.WriteLine(Strings);
102                 f2.Close();
103                 f2.Dispose();
104                 return "ok";
105             }
106             catch (Exception ex)
107             {
108 
109                 return ex.Message;
110             }
111         }
112         #endregion
113 
114         #region 04.读文件（.txt）
115         /// <summary>
116         /// 读文件
117         /// </summary>
118         /// <param name="FileName">文件路径(web里相对路径,控制台在根目录下写)</param>
119         /// <returns></returns>
120         public static string ReadFile(string FileName)
121         {
122             try
123             {
124                 string Path = FileOperateHelp.PathConvert(FileName);
125                 string s = "";
126                 if (!System.IO.File.Exists(Path))
127                     s = "不存在相应的目录";
128                 else
129                 {
130                     StreamReader f2 = new StreamReader(Path, System.Text.Encoding.GetEncoding("gb2312"));
131                     s = f2.ReadToEnd();
132                     f2.Close();
133                     f2.Dispose();
134                 }
135                 return s;
136             }
137             catch (Exception ex)
138             {
139                 return ex.Message;
140             }
141         }
142         #endregion
143 
144         #region 05.删除文件
145         /// <summary>
146         /// 删除文件
147         /// </summary>
148         /// <param name="Path">文件路径(web里相对路径,控制台在根目录下写)</param>
149         public static string FileDel(string Path)
150         {
151             try
152             {
153                 string temp = FileOperateHelp.PathConvert(Path);
154                 File.Delete(temp);
155                 return "ok";
156             }
157             catch (Exception ex)
158             {
159                 return ex.Message;
160             }
161         }
162         #endregion
163 
164         #region 06.移动文件
165         /// <summary>
166         /// 移动文件
167         /// </summary>
168         /// <param name="OrignFile">原始路径(web里相对路径,控制台在根目录下写)</param>
169         /// <param name="NewFile">新路径,需要写上路径下的文件名，不能单写路径(web里相对路径,控制台在根目录下写)</param>
170         public static string FileMove(string OrignFile, string NewFile)
171         {
172             try
173             {
174                 OrignFile = FileOperateHelp.PathConvert(OrignFile);
175                 NewFile = FileOperateHelp.PathConvert(NewFile);
176                 File.Move(OrignFile, NewFile);
177                 return "ok";
178             }
179             catch (Exception ex)
180             {
181                 return ex.Message;
182             }
183         }
184         #endregion
185 
186         #region 07.复制文件
187         /// <summary>
188         /// 复制文件
189         /// </summary>
190         /// <param name="OrignFile">原始文件(web里相对路径,控制台在根目录下写)</param>
191         /// <param name="NewFile">新文件路径(web里相对路径,控制台在根目录下写)</param>
192         public static string FileCopy(string OrignFile, string NewFile)
193         {
194             try
195             {
196                 OrignFile = FileOperateHelp.PathConvert(OrignFile);
197                 NewFile = FileOperateHelp.PathConvert(NewFile);
198                 File.Copy(OrignFile, NewFile, true);
199                 return "ok";
200             }
201             catch (Exception ex)
202             {
203                 return ex.Message;
204             }
205         }
206         #endregion
207 
208         #region 08.创建文件夹
209         /// <summary>
210         /// 创建文件夹
211         /// </summary>
212         /// <param name="Path">相对路径(web里相对路径,控制台在根目录下写)</param>
213         public static string FolderCreate(string Path)
214         {
215             try
216             {
217                 Path = FileOperateHelp.PathConvert(Path);
218                 // 判断目标目录是否存在如果不存在则新建之
219                 if (!Directory.Exists(Path))
220                 {
221                     Directory.CreateDirectory(Path);
222                 }
223                 return "ok";
224             }
225             catch (Exception ex)
226             {
227                 return ex.Message;
228             }
229         }
230         #endregion
231 
232         #region 09.递归删除文件夹目录及文件
233         /// <summary>
234         /// 递归删除文件夹目录及文件
235         /// </summary>
236         /// <param name="dir">相对路径(web里相对路径,控制台在根目录下写) 截止到哪删除到哪，eg：/a/ 连a也删除</param>
237         /// <returns></returns>
238         public static string DeleteFolder(string dir)
239         {
240 
241             try
242             {
243                 string adir = FileOperateHelp.PathConvert(dir);
244                 if (Directory.Exists(adir)) //如果存在这个文件夹删除之
245                 {
246                     foreach (string d in Directory.GetFileSystemEntries(adir))
247                     {
248                         if (File.Exists(d))
249                             File.Delete(d); //直接删除其中的文件
250                         else
251                             DeleteFolder(d); //递归删除子文件夹
252                     }
253                     Directory.Delete(adir, true); //删除已空文件夹
254                 }
255                 return "ok";
256             }
257             catch (Exception ex)
258             {
259                 return ex.Message;
260             }
261         }
262 
263         #endregion
264 
265         #region 10.将相对路径转换成绝对路径
266         /// <summary>
267         /// 10.将相对路径转换成绝对路径
268         /// </summary>
269         /// <param name="strPath">相对路径</param>
270         public static string PathConvert(string strPath)
271         {
272             //web程序使用
273             if (HttpContext.Current != null)
274             {
275                 return HttpContext.Current.Server.MapPath(strPath);
276             }
277             else //非web程序引用
278             {
279                 strPath = strPath.Replace("/", "\\");
280                 if (strPath.StartsWith("\\"))
281                 {
282                     strPath = strPath.TrimStart('\\');
283                 }
284                 return System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, strPath);
285             }
286         }
287         #endregion
288 
289     }