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Use the Asp.net Ajax framework to achieve interaction between the page without refreshing the server

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Author: User
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  1. // Asynccomlayer. ASPX page
  2. <% @ Page Language = "C #" %>
  4. <% @ Register Assembly = "system. Web. Extensions, version = 1.0.61025.0, culture = neutral, publickeytoken = 31bf3856ad364e35"
  5. Namespace = "system. Web. UI" tagprefix = "asp" %>
  7. <! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  9. <SCRIPT runat = "server">
  11. </SCRIPT>
  13. <HTML xmlns = "http://www.w3.org/1999/xhtml">
  14. <Head runat = "server">
  15. <Title> asynchronous communication layer overview </title>
  16. </Head>
  17. <Body>
  19. <Form ID = "form1" runat = "server">
  21. <Script language = "JavaScript" type = "text/JavaScript">
  22. Function showemployee (firstname, lastname, title)
  23. {
  24. VaR request = new SYS. net. webrequest ();
  25. Request. set_url ('getemployee. ashx ');
  26. Request. set_httpverb ("Post ");
  27. Request. add_completed (ongetemployeecomplete );
  29. VaR requestbody = string. Format (
  30. "Firstname = {0} & lastname = {1} & Title = {2 }",
  31. Encodeuricomponent (firstname ),
  32. Encodeuricomponent (lastname ),
  33. Encodeuricomponent (title ));
  34. Request. set_body (requestbody );
  36. Request. Invoke ();
  37. }
  39. Function ongetemployeecomplete (response)
  40. {
  41. If (response. get_responseavailable ())
  42. {
  43. VaR Employee = response. get_object ();
  44. Alert (string. Format (
  45. "Hello I'm {0} {1}, My title is '{2 }'",
  46. Employee. firstname,
  47. Employee. lastname,
  48. Employee. Title ));
  49. }
  50. }
  51. </SCRIPT>
  54. <Asp: scriptmanager id = "scriptmanager1" runat = "server">
  55. </ASP: scriptmanager>
  57. <Input type = "button" value = "Bill Gates"
  58. Onclick = "showemployee ('bill ', 'gates', 'chair man')"/>
  59. <Input type = "button" value = "Steve Ballmer"
  60. Onclick = "showemployee ('Steve ', 'ballmer', 'ceo ')"/>
  61. </Form>
  62. </Body>
  63. </Html>
  65. // Getemployee. ashx File
  66. <% @ Webhandler Language = "C #" class = "aspnetajaxoverview. getemployee" %>
  68. Using system;
  69. Using system. Web;
  70. Using system. Web. Script. serialization;
  72. Namespace aspnetajaxoverview
  73. {
  74. Public class getemployee: ihttphandler
  75. {
  76. Public void processrequest (httpcontext context)
  77. {
  78. Context. response. contenttype = "text/plain ";
  80. String firstname = context. Request. Params ["firstname"];
  81. String lastname = context. Request. Params ["lastname"];
  82. String title = context. Request. Params ["title"];
  83. Employee Employee = new employee (firstname, lastname, title );
  85. Javascriptserializer serializer = new javascriptserializer ();
  86. String jsonemp = serializer. serialize (employee );
  88. Context. response. Write (jsonemp );
  89. }
  91. Public bool isreusable
  92. {
  93. Get
  94. {
  95. Return false;
  96. }
  97. }
  99. }
  100. }
  102. // Employee. CS File
  103. Using system;
  104. Using system. Data;
  105. Using system. configuration;
  106. Using system. Web;
  107. Using system. Web. Security;
  108. Using system. Web. UI;
  109. Using system. Web. UI. webcontrols;
  110. Using system. Web. UI. webcontrols. webparts;
  111. Using system. Web. UI. htmlcontrols;
  113. Namespace aspnetajaxoverview
  114. {
  115. /// <Summary>
  116. /// Summary description for employee
  117. /// </Summary>
  118. Public class employee
  119. {
  120. Private string _ firstname;
  121. Private string _ lastname;
  122. Private string _ title;
  124. Public Employee (){}
  126. Public Employee (string firstname, string lastname, String title)
  127. {
  128. This. _ firstname = firstname;
  129. This. _ lastname = lastname;
  130. This. _ Title = title;
  131. }
  133. Public String firstname
  134. {
  135. Get
  136. {
  137. Return this. _ firstname;
  138. }
  139. }
  141. Public String lastname
  142. {
  143. Get
  144. {
  145. Return this. _ lastname;
  146. }
  147. }
  149. Public String title
  150. {
  151. Get
  152. {
  153. Return this. _ title;
  154. }
  155. }
  156. }
  157. }

 

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