C#中对文件File常用操作方法的工具类

场景

C#中File类的常用读取与写入文件方法的利用：

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

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实现

获取文件的扩展名

1. /// <summary>
2. /// 获取文件的扩展名
3. /// </summary>
4. /// <param name="filename">完备文件名</param>
5. /// <returns>返回扩展名</returns>
6. public static string GetPostfixStr(string filename)
7. {
8. int num = filename.LastIndexOf(".");
9. int length = filename.Length;
10. return filename.Substring(num, length - num);
11. }

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读取文件内容

1. /// <summary>
2. /// 读取文件内容
3. /// </summary>
4. /// <param name="path">要读取的文件路径</param>
5. /// <returns>返回文件内容</returns>
6. public static string ReadFile(string path)
7. {
8. string result;
9. if (!System.IO.File.Exists(path))
10. {
11. result = "不存在相应的目次";
12. }
13. else
14. {
15. System.IO.FileStream stream = new System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);
16. System.IO.StreamReader streamReader = new System.IO.StreamReader(stream, System.Text.Encoding.Default);
17. result = streamReader.ReadToEnd();
18. streamReader.Close();
19. streamReader.Dispose();
20. }
21. return result;
22. }

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指定编码格式读取文件内容

1. /// <summary>
2. /// 读取文件内容
3. /// </summary>
4. /// <param name="path">要读取的文件路径</param>
5. /// <param name="encoding">编码格式</param>
6. /// <returns>返回文件内容</returns>
7. public static string ReadFile(string path, System.Text.Encoding encoding)
8. {
9. string result;
10. if (!System.IO.File.Exists(path))
11. {
12. result = "不存在相应的目次";
13. }
14. else
15. {
16. System.IO.FileStream stream = new System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);
17. System.IO.StreamReader streamReader = new System.IO.StreamReader(stream, encoding);
18. result = streamReader.ReadToEnd();
19. streamReader.Close();
20. streamReader.Dispose();
21. }
22. return result;
23. }

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向指定文件写入内容

1. /// <summary>
2. /// 向指定文件写入内容
3. /// </summary>
4. /// <param name="path">要写入内容的文件完备路径</param>
5. /// <param name="content">要写入的内容</param>
6. public static void WriteFile(string path, string content)
7. {
8. try
9. {
10. object obj = new object();
11. if (!System.IO.File.Exists(path))
12. {
13. System.IO.FileStream fileStream = System.IO.File.Create(path);
14. fileStream.Close();
15. }
16. lock (obj)
17. {
18. using (System.IO.StreamWriter streamWriter = new System.IO.StreamWriter(path, false, System.Text.Encoding.Default))
19. {
20. streamWriter.WriteLine(content);
21. streamWriter.Close();
22. streamWriter.Dispose();
23. }
24. }
25. }
26. catch (System.Exception ex)
27. {
28. ICSharpCode.Core.LoggingService<FileHelper>.Error(String.Format("写入文件{0}非常:{1}", path, ex.Message), ex);
29. }
30. }

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指定编码格式向文件写入内容

1. /// <summary>
2. /// 向指定文件写入内容
3. /// </summary>
4. /// <param name="path">要写入内容的文件完备路径</param>
5. /// <param name="content">要写入的内容</param>
6. /// <param name="encoding">编码格式</param>
7. public static void WriteFile(string path, string content, System.Text.Encoding encoding)
8. {
9. try
10. {
11. object obj = new object();
12. if (!System.IO.File.Exists(path))
13. {
14. System.IO.FileStream fileStream = System.IO.File.Create(path);
15. fileStream.Close();
16. }
17. lock (obj)
18. {
19. using (System.IO.StreamWriter streamWriter = new System.IO.StreamWriter(path, false, encoding))
20. {
21. streamWriter.WriteLine(content);
22. streamWriter.Close();
23. streamWriter.Dispose();
24. }
25. }
26. }
27. catch (System.Exception ex)
28. {
29. ICSharpCode.Core.LoggingService<FileHelper>.Error(String.Format("写入文件{0}非常:{1}", path, ex.Message), ex);
30. }
31. }

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文件复制

1. /// <summary>
2. /// 文件复制
3. /// </summary>
4. /// <param name="orignFile">源文件完备路径</param>
5. /// <param name="newFile">目标文件完备路径</param>
6. public static void FileCoppy(string orignFile, string newFile)
7. {
8. System.IO.File.Copy(orignFile, newFile, true);
9. }

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文件删除

1. /// <summary>
2. /// 删除文件
3. /// </summary>
4. /// <param name="path">要删除的文件的完备路径</param>
5. public static void FileDel(string path)
6. {
7. System.IO.File.Delete(path);
8. }

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文件移动

1. /// <summary>
2. /// 文件移动（剪贴->粘贴）
3. /// </summary>
4. /// <param name="orignFile">源文件的完备路径</param>
5. /// <param name="newFile">目标文件完备路径</param>
6. public static void FileMove(string orignFile, string newFile)
7. {
8. System.IO.File.Move(orignFile, newFile);
9. }

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判定一组文件是否都存在

1. /// <summary>
2. /// 判定一组文件是否都存在
3. /// </summary>
4. /// <param name="filePathList">文件路径List</param>
5. /// <returns>文件是否全部存在</returns>
6. public static bool IsFilesExist(List<string> filePathList)
7. {
8. bool isAllExist = true;
9. foreach(string filePath in filePathList)
10. {
11. if(!File.Exists(filePath))
12. {
13. isAllExist = false;
14. }
15. }
16. return isAllExist;
17. }

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创建目次

1. /// <summary>
2. /// 创建目次
3. /// </summary>
4. /// <param name="orignFolder">当前目次</param>
5. /// <param name="newFloder">要创建的目次名</param>
6. public static void FolderCreate(string orignFolder, string newFloder)
7. {
8. System.IO.Directory.SetCurrentDirectory(orignFolder);
9. System.IO.Directory.CreateDirectory(newFloder);
10. }

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删除目次

1. /// <summary>
2. /// 删除目次
3. /// </summary>
4. /// <param name="dir">要删除的目次</param>
5. public static void DeleteFolder(string dir)
6. {
7. if (System.IO.Directory.Exists(dir))
8. {
9. string[] fileSystemEntries = System.IO.Directory.GetFileSystemEntries(dir);
10. for (int i = 0; i < fileSystemEntries.Length; i++)
11. {
12. string text = fileSystemEntries[i];
13. if (System.IO.File.Exists(text))
14. {
15. System.IO.File.Delete(text);
16. }
17. else
18. {
19. FileHelper.DeleteFolder(text);
20. }
21. }
22. System.IO.Directory.Delete(dir);
23. }
24. }

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目次内容复制

1. /// <summary>
2. /// 目次内容复制
3. /// </summary>
4. /// <param name="srcPath">源目次</param>
5. /// <param name="aimPath">目标目次</param>
6. public static void CopyDir(string srcPath, string aimPath)
7. {
8. try
9. {
10. if (aimPath[aimPath.Length - 1] != System.IO.Path.DirectorySeparatorChar)
11. {
12. aimPath += System.IO.Path.DirectorySeparatorChar;
13. }
14. if (!System.IO.Directory.Exists(aimPath))
15. {
16. System.IO.Directory.CreateDirectory(aimPath);
17. }
18. string[] fileSystemEntries = System.IO.Directory.GetFileSystemEntries(srcPath);
19. string[] array = fileSystemEntries;
20. for (int i = 0; i < array.Length; i++)
21. {
22. string text = array[i];
23. if (System.IO.Directory.Exists(text))
24. {
25. FileHelper.CopyDir(text, aimPath + System.IO.Path.GetFileName(text));
26. }
27. else
28. {
29. System.IO.File.Copy(text, aimPath + System.IO.Path.GetFileName(text), true);
30. }
31. }
32. }
33. catch (System.Exception ex)
34. {
35. throw new System.Exception(ex.ToString());
36. }
37. }

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