C # resize the image and add a copyright watermark to the image

1. Using system;
2. Using system. Data;
3. Using system. configuration;
4. Using system. collections;
5. Using system. Web;
6. Using system. Web. Security;
7. Using system. Web. UI;
8. Using system. Web. UI. webcontrols;
9. Using system. Web. UI. webcontrols. webparts;
10. Using system. Web. UI. htmlcontrols;
11. Using system. drawing;
12. Using system. Drawing. drawing2d;
13. Using system. Drawing. imaging;
16. Public partial class web_makewatermark: system. Web. UI. Page
17. {
18. /// <Param name = "newfaxwidtht"> zoom to width </param>
19. /// <Param name = "newfaxheight"> zoom to height </param>
20. Int newfaxwidtht = 100;
21. Int newfaxheight = 120;
23. Protected void page_load (Object sender, eventargs E)
24. {
25. String stroldpic = "images/welcome.jpg ";
26. String strnewpic = "images/welcome-1.jpg ";
27. This. smallpic (stroldpic, strnewpic, newfaxwidtht, newfaxheight );
28. This. makewatermark (strnewpic );
29. }
31. /** // <Summary>
32. /// Generate an image with a copyright watermark
33. /// </Summary>
34. /// <Param name = "iconimg"> file address of the watermark image to be generated </param>
35. Private void makewatermark (string iconimg)
36. {
37. // Define the output bitmap
38. Bitmap BMP = new Bitmap (newfaxwidtht, newfaxheight );
39. // Define the Drawing Object
40. Graphics G = graphics. fromimage (BMP );
41. // Describe the rectangular area of the Drawing
42. Rectangle newrect = new rectangle (0, 0, newfaxwidtht, newfaxheight );
43. // Set the background color
44. G. fillrectangle (New solidbrush (color. White), newrect );
45. // Obtain the image to generate the watermark
46. Bitmap newbitmap = new Bitmap (iconimg );
47. G. drawimage (newbitmap, 0, 0 );
48. // Define the font of the watermark.
49. Font font = new font ("Arial", 10, fontstyle. Bold );
50. // Define the format of the watermark.
51. Lineargradientbrush brush = new lineargradientbrush (
52. New rectangle (0, 0, 10, 20 ),
53. Color. Red,
54. Color. Blue,
55. 10f,
56. True
57. );
58. // Add a watermark to the photo
59. G. drawstring ("szrjjz.com", Font, brush, 0, newFaxHeight-20 );
60. // Save as a new output image
61. System. Io. memorystream MS = new system. Io. memorystream ();
62. BMP. Save (MS, imageformat. JPEG );
64. // Output image
65. Response. clearcontent ();
66. Response. contenttype = "image/JPEG ";
67. Response. binarywrite (Ms. toarray ());
68. }
70. /// <Summary>
71. /// Scale the image
72. /// </Summary>
73. /// <Param name = "stroldpic"> source image file name (including path) </param>
74. /// <Param name = "strnewpic"> Save As a file name (including path) after scaling </param>
75. /// <Param name = "intwidth"> zoom to width </param>
76. /// <Param name = "intheight"> zoom to height </param>
77. Public void smallpic (string stroldpic, string strnewpic, int intwidth, int intheight)
78. {
80. System. Drawing. Bitmap objpic, objnewpic;
81. Try
82. {
83. Objpic = new system. Drawing. Bitmap (stroldpic );
84. Objnewpic = new system. Drawing. Bitmap (objpic, intwidth, intheight );
85. Objnewpic. Save (strnewpic );
87. }
88. Catch (exception exp) {Throw exp ;}
89. Finally
90. {
91. Objpic = NULL;
92. Objnewpic = NULL;
93. }
94. }
96. }