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C # upload images, generate thumbnails, and generate text or image watermarks

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Author: User
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<% @ Page Language = "C #" autoeventwireup = "true" codefile = "default. aspx. cs" inherits = "_ default" %> <! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <HTML xmlns = "http://www.w3.org/1999/xhtml"> 

 

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  1. Using system;
    2. 
 
  
  2. Using system. Data;
    3. 
 
  
  3. Using system. configuration;
    4. 
 
  
  4. Using system. Web;
    5. 
 
  
  5. Using system. Web. Security;
    6. 
 
  
  6. Using system. Web. UI;
    7. 
 
  
  7. Using system. Web. UI. webcontrols;
    8. 
 
  
  8. Using system. Web. UI. webcontrols. webparts;
    9. 
 
  
  9. Using system. Web. UI. htmlcontrols;
    10. 
 
  
  10. Using system. drawing;
    11. 
 
  
  11. 
 
  
  12. Public partial class _ default: system. Web. UI. Page
    13. 
 
  
  13. {
    14. 
 
  
  14. Protected void page_load (Object sender, eventargs E)
    15. 
 
  
  15. {
    16. 
 
  
  16. 
 
  
  17. }
    18. 
 
  
  18. Protected void button#click (Object sender, eventargs E)
    19. 
 
  
  19. {
    20. 
 
  
  20. String filename = fileupload1.filename;
    21. 
 
  
  21. String nowpath = server. mappath (".") + "\\";
    22. 
 
  
  22. Filename = nowpath + filename;
    23. 
 
  
  23. 
 
  
  24. // Save the source Image
    25. 
 
  
  25. Fileupload1.saveas (filename );
    26. 
 
  
  26. 
 
  
  27. System. Drawing. Image image, newimage, syimage;
    28. 
 
  
  28. System. Drawing. image. getthumbnailimageabort callb = NULL;
    29. 
 
  
  29. Image = system. Drawing. image. fromfile (filename );
    30. 
 
  
  30. Syimage = system. drawing. image. fromfile (server. mappath (". ") +" \ "+" .gif "); // to place a" .gif "file under the directory, you can download from the Internet: http://www.baidu.com/img/baidu.gif
    31. 
 
  
  31. 
 
  
  32. // Save the thumbnail
    33. 
 
  
  33. Newimage = image. getthumbnailimage (100,100, callb, new intptr ());
    34. 
 
  
  34. Newimage. Save (filename + ".w.tu.png ");
    35. 
 
  
  35. Newimage. Dispose ();
    36. 
 
  
  36. 
 
  
  37. // Process the original image
    38. 
 
  
  38. Graphics G = graphics. fromimage (image );
    39. 
 
  
  39. Font F = new font ("", 16 );
    40. 
 
  
  40. Brush B = new solidbrush (colortranslator. fromhtml ("# ff0000 "));
    41. 
 
  
  41. String addtext = "text watermark content ";
    42. 
 
  
  42. G. drawstring (addtext, F, B, 10, 10 );
    43. 
 
  
  43. G. drawimageunscaled (syimage, 50, 50 );
    44. 
 
  
  44. // G. drawimage (newimage, 50, 50, 100,100 );
    45. 
 
  
  45. G. Dispose ();
    46. 
 
  
  46. 
 
  
  47. // Generate a watermark image
    48. 
 
  
  48. Image. Save (filename + ". .png ");
    49. 
 
  
  49. 
 
  
  50. Image. Dispose ();
    51. 
 
  
  51. Syimage. Dispose ();
    52. 
 
  
  52. 
 
  
  53. Image1.imageurl = fileupload1.filename;
    54. 
 
  
  54. Image2.imageurl = fileupload1.filename + ". .png ";
    55. 
 
  
  55. Image3.imageurl = fileupload1.filename + ". .png ";
    56. 
 
  
  56. 
 
  
  57. }
    58. 
 
  
  58. }
    59.

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