Use flex to access the WebService written by Asp.net.

The process of using the flex program as the client to access the Web Service written with Asp.net is as follows:

1. Use vs to create an Asp.net WebService website, which is named website9. Compile a helloworld method to accept a string type input and a string type output. The source code of this WebService is as follows:

1. Using system;
2. Using system. LINQ;
3. Using system. Web;
4. Using system. Web. Services;
5. Using system. Web. Services. Protocols;
6. Using system. xml. LINQ;
8. [WebService (namespace = "http://tempuri.org/")]
9. [Webservicebinding (conformsto = wsiprofiles. basicprofile1_1)]
10. // To allow this web service to be called from script, using ASP. NET Ajax, uncomment the following line.
11. // [System. Web. Script. Services. scriptservice]
12. Public class service: system. Web. Services. WebService
13. {
14. Public Service (){
16. // Uncomment the following line if using designed components
17. // Initializecomponent ();
18. }
20. [Webmethod]
21. Public String helloworld (string input ){
22. Return "Hello World," + input;
23. }
25. }

2. Specify a fixed port for this website project, which is assumed to be 8888. Run website9 and you can see that the WSDL address of this WebService is: http: // localhost: 8888/website9/service. asmx? WSDL
Open this address and find the following information, indicating that the input parameter accepted by the helloworld function is input, and the returned parameter is helloworldresult.

1. <S: element name = "helloworld">
2. <S: complextype>
3. <S: sequence>
4. <S: Element minoccurs = "0" maxoccurs = "1" name = "input" type = "s: string"/>
5. </S: sequence>
6. </S: complextype>
7. </S: Element>
8. <S: element name = "helloworldresponse">
9. <S: complextype>
10. <S: sequence>
11. <S: Element minoccurs = "0" maxoccurs = "1" name = "helloworldresult" type = "s: string"/>
12. </S: sequence>
13. </S: complextype>
14. </S: Element>

3. Compile a flex program to access the preceding WebService. You can use mxml or ActionScript in either of the following ways.

Method 1: Use mxml

1. <? XML version = "1.0" encoding = "UTF-8"?>
2. <Mx: Application xmlns: MX = "http://www.adobe.com/2006/mxml" layout = "absolute" fontsize = "12">
4. <Mx: SCRIPT>
5. <! [CDATA [
6. Import MX. rpc. Events. resultevent;
7. Import MX. rpc. Events. faultevent;
9. Private var WS: WebService = new WebService ();
11. Internal function sendmessage (): void {
12. Loader. helloworld. Send ();
13. }
15. Internal function completehandler (EVT: resultevent): void {
16. Result_txt.text = EVT. Result. tostring ();
17. }
19. Internal function errorhandler (EVT: faultevent): void {
20. Result_txt.text = EVT. fault. tostring ();
21. }
22. ]>
23. </MX: SCRIPT>
26. <Mx: WebService id = "loader" WSDL = "http: // localhost: 8888/website9/service. asmx? WSDL "result =" completehandler (event) "showbusycursor =" true "fault =" errorhandler (event) ">
27. <Mx: Operation name = "helloworld">
28. <Mx: Request>
29. <Input> <! -- Input parameter name: Input -->
30. {Input_txt.text}
31. </Input>
32. </MX: Request>
33. </MX: Operation>
35. </MX: WebService>
38. <Mx: textinput x = "110" Y = "134" width = "249" id = "input_txt"/>
39. <Mx: button x = "376" Y = "134" label = "Send request" id = "send_btn" Click = "sendmessage ()"/>
40. <Mx: textarea x = "110" Y = "193" width = "344" Height = "258" id = "result_txt"/>
42. </MX: Application>

Method 2: use ActionScript

1. <? XML version = "1.0" encoding = "UTF-8"?>
2. <Mx: Application xmlns: MX = "http://www.adobe.com/2006/mxml" layout = "absolute" fontsize = "12">
4. <Mx: SCRIPT>
5. <! [CDATA [
6. Import MX. rpc. Events. resultevent;
7. Import MX. rpc. Events. faultevent;
8. Import MX. rpc. Soap. WebService; // Add a reference to the WebService Control
   
10. Private var WS: WebService = new WebService ();
12. Internal function sendmessage (): void {
13. Loader. helloworld. Send ();
14. WS. helloworld. addeventlistener ("result", completehandler );
15. WS. helloworld. addeventlistener ("fault", errorhandler );
16. WS. loadwsdl ("http: // localhost: 8888/website9/service. asmx? WSDL ");
17. VaR STR: String = input_txt.text;
18. WS. helloworld (STR); // call the remote function directly.
    
19. }
21. Internal function completehandler (EVT: resultevent): void {
22. Result_txt.text = EVT. Result. tostring ();
23. }
25. Internal function errorhandler (EVT: faultevent): void {
26. Result_txt.text = EVT. fault. tostring ();
27. }
28. ]>
29. 
    
30. </MX: SCRIPT>
35. </MX: WebService>
38. <Mx: textinput x = "110" Y = "134" width = "249" id = "input_txt"/>
39. <Mx: button x = "376" Y = "134" label = "Send request" id = "send_btn" Click = "sendmessage ()"/>
40. <Mx: textarea x = "110" Y = "193" width = "344" Height = "258" id = "result_txt"/>
42. </MX: Application>