本文共 2042 字，大约阅读时间需要 6 分钟。

1. //byte[] 转图片

2. public static Bitmap BytesToBitmap(byte[] Bytes)

3. {

4. MemoryStream stream = null;

5. try

6. {

7. stream = new MemoryStream(Bytes);

8. return new Bitmap((Image)new Bitmap(stream));

9. }

10. catch (ArgumentNullException ex)

11. {

12. throw ex;

13. }

14. catch (ArgumentException ex)

15. {

16. throw ex;

17. }

18. finally

19. {

20. stream.Close();

21. }

22. }

23.  

24. //图片转byte[]

25. public static byte[] BitmapToBytes(Bitmap Bitmap)

26. {

27. MemoryStream ms = null;

28. try

29. {

30. ms = new MemoryStream();

31. Bitmap.Save(ms, Bitmap.RawFormat);

32. byte[] byteImage = new Byte[ms.Length];

33. byteImage = ms.ToArray();

34. return byteImage;

35. }

36. catch (ArgumentNullException ex)

37. {

38. throw ex;

39. }

40. finally

41. {

42. ms.Close();

43. }

44. }

45. }

46.  

47. =====================

48.  

49. * Stream 和 byte[] 之间的转换

50. * - - - - - - - - - - - - - - - - - - - - - - - */

51. /// <summary>

52. /// 将 Stream 转成 byte[]

53. /// </summary>

54. public byte[] StreamToBytes(Stream stream)

55. {

56. byte[] bytes = new byte[stream.Length];

57. stream.Read(bytes, 0, bytes.Length);

58.  

59. // 设置当前流的位置为流的开始

60. stream.Seek(0, SeekOrigin.Begin);

61. return bytes;

62. }

63.  

64. /// <summary>

65. /// 将 byte[] 转成 Stream

66. /// </summary>

67. public Stream BytesToStream(byte[] bytes)

68. {

69. Stream stream = new MemoryStream(bytes);

70. return stream;

71. }

72.  
73.  

74. /* - - - - - - - - - - - - - - - - - - - - - - - -

75. * Stream 和 文件之间的转换

76. * - - - - - - - - - - - - - - - - - - - - - - - */

77. /// <summary>

78. /// 将 Stream 写入文件

79. /// </summary>

80. public void StreamToFile(Stream stream,string fileName)

81. {

82. // 把 Stream 转换成 byte[]

83. byte[] bytes = new byte[stream.Length];

84. stream.Read(bytes, 0, bytes.Length);

85. // 设置当前流的位置为流的开始

86. stream.Seek(0, SeekOrigin.Begin);

87.  

88. // 把 byte[] 写入文件

89. FileStream fs = new FileStream(fileName, FileMode.Create);

90. BinaryWriter bw = new BinaryWriter(fs);

91. bw.Write(bytes);

92. bw.Close();

93. fs.Close();

94. }

95.  

96. /// <summary>

97. /// 从文件读取 Stream

98. /// </summary>

99. public Stream FileToStream(string fileName)

100. {

101. // 打开文件

102. FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);

103. // 读取文件的 byte[]

104. byte[] bytes = new byte[fileStream.Length];

105. fileStream.Read(bytes, 0, bytes.Length);

106. fileStream.Close();

107. // 把 byte[] 转换成 Stream

108. Stream stream = new MemoryStream(bytes);

109. return stream;

110. }

111.  

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