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Ajax. Net call WebService Method

Source: Internet
Author: User
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Ajax. as one of the mature Ajax platforms. NET platform is developed by Microsoft, so Ajax is used. net client script call. net Development of WebService will be a very simple thing, this is one of the exciting thing.

Next, we will introduce the call process step by step. First, we first use vs2008 to add a WebService, itsCodeAs follows:

  2. UsingSystem;
  4. UsingSystem. collections;
  6. UsingSystem. componentmodel;
  8. UsingSystem. Data;
  10. UsingSystem. LINQ;
  12. UsingSystem. Web;
  14. UsingSystem. Web. Services;
  16. UsingSystem. Web. Services. Protocols;
  18. UsingSystem. xml. LINQ;
  22. NamespaceWebservice1
  24. {
  26. /// <Summary>
  28. /// Summary of service1
  30. /// </Summary>
  32. [WebService (namespace ="Http://tempuri.org /")]
  34. [Webservicebinding (conformsto = wsiprofiles. basicprofile1_1)]
  36. [Toolboxitem (False)]
  38. // To allow ASP. Net ajax to call this web service from a script, cancel the comments to the downstream.
  40. [System. Web. Script. Services. scriptservice]
  42. Public ClassService1: system. Web. Services. WebService
  44. {
  48. [Webmethod]
  50. Public StringHelloworld ()
  52. {
  54. Return "Hello World";
  56. }
  58. }
  60. }

Note: add the attribute [system. Web. Script. Services. scriptservice] To the WebService class so that ASP. Net AJAX can call this web service from the script.

Add an Ajax web page and add a reference to WebService to the page. You can write script code to call this WebService. The Code is as follows:

  2. <% @ PageLanguage="C #" Autoeventwireup="True" Codebehind="Webform1.aspx. cs" Inherits="Webservice1.webform1"%>
  6. <! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  10. <Html Xmlns=Http://www.w3.org/1999/xhtml" >
  12. <Head Runat="Server">
  14. <Title>No title page</Title>
  16. <Script Type="Text/JavaScript">
  20. Function callmethod ()
  22. {
  24. Webservice1.service1. helloworld (succeededcallback );
  26. }
  30. Function succeededcallback (RES)
  32. {
  34. Alert (RES );
  36. }
  40. </Script>
  42. </Head>
  44. <Body>
  46. <Form ID="Form1" Runat="Server">
  48. <Div>
  50. <ASP: scriptmanager ID="Scriptmanager1" Runat="Server">
  52. <Services>
  54. <ASP: servicereference Path="~ /Service1.asmx" />
  56. </Services>
  58. </ASP: scriptmanager>
  60. </Div>
  62. <Input ID="Button2" Type="Button" Value="WebService method call" Onclick="Callmethod ()" />
  64. </Form>
  66. </Body>
  68. </Html>

Call methods are almost the same as function calls in C #. They can be called in the form of namespaces, type names, method names, and parameters. in addition, we only need to add a callback method to process the returned results of the call. for basic parameters, you can directly pass them, complex parameters I use the popular JSON technology as the carrier for data transmission. For details about JSON technology, refer to the following article.Article:

JSON Technology and Its Application in JBF for ASP. NET

In addition, the BS part of the ultimate basic business platform is the use of this total JS + webserver technology, a realistic and friendly user interface, you can download from the following URL to the free trial version of the platform.

Http://www.jeez.com.cn/jbf/

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Related Keywords:
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