Interface.aspx 2.6 KB

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  1. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  2. <html xmlns="http://www.w3.org/1999/xhtml">
  3. <head>
  4. <title>Interface</title>
  5. </head>
  6. <body>
  7. <form id="Main" runat="server">
  8. <asp:ScriptManager runat="server" ID="scriptManager" />
  9. </form>
  10. <h2>Interface</h2>
  11. <p />
  12. <div>
  13. This file contains a Tree base class, and an IFruitTree interface.
  14. Apple and Banana, two derived classes implement that interface, whereas,
  15. Pine does not implement that interface.
  16. <p />
  17. </div>
  18. <script type="text/javascript" src="Interface.js"></script>
  19. <div>
  20. <ul>
  21. <li><a href="#" onclick="return OnTestNewClick()">Object Creation</a></li>
  22. <li><a href="#" onclick="return OnTestImplementsClick()">Implements Check</a></li>
  23. <li><a href="#" onclick="return OnTestInterfaceMethodClick()">Call interface method</a></li>
  24. </ul>
  25. </div>
  26. <script type="text/javascript" language="JavaScript">
  27. function OnTestNewClick() {
  28. var apple = new Demo.Trees.Apple('Apple');
  29. alert(apple.returnName());
  30. apple.makeLeaves();
  31. return false;
  32. }
  33. function OnTestImplementsClick() {
  34. var apple = new Demo.Trees.Apple();
  35. if (Demo.Trees.IFruitTree.isImplementedBy(apple)) {
  36. alert('Apple implements IFruitTree');
  37. }
  38. else {
  39. alert('Apple does not implement IFruitTree');
  40. }
  41. var pine = new Demo.Trees.Pine();
  42. if (Demo.Trees.IFruitTree.isImplementedBy(pine)) {
  43. alert('Pine implements IFruitTree');
  44. }
  45. else {
  46. alert('Pine does not implement IFruitTree');
  47. }
  48. return false;
  49. }
  50. function OnTestInterfaceMethodClick() {
  51. var apple = new Demo.Trees.Apple();
  52. ProcessTree(apple);
  53. var pine = new Demo.Trees.Pine();
  54. ProcessTree(pine);
  55. var banana = new Demo.Trees.Banana();
  56. ProcessTree(banana);
  57. var g = new Demo.Trees.GrannySmith();
  58. ProcessTree(g);
  59. return false;
  60. }
  61. function ProcessTree(tree) {
  62. alert('Current Tree ' + tree.returnName());
  63. alert(tree.toStringCustom());
  64. if (Demo.Trees.IFruitTree.isImplementedBy(tree)) {
  65. alert(tree.returnName() + ' implements IFruitTree; Fruit is ' + tree.bearFruit());
  66. }
  67. }
  68. </script>
  69. </body>
  70. </html>