This document provides an overview of consuming and creating XML web services. It discusses finding, calling, and creating XML web services using HTTP, proxies, and ASP.NET. Key topics covered include the XML web service execution model, calling services using HTTP or a proxy, handling errors, and creating a web service by declaring web methods and building the project. The document concludes with a review of the lessons and describes an example lab application that consumes and exposes XML web services.

1. Module 13: Consuming and Creating XML Web Services

2. Overview Overview of Using XML Web Services Calling an XML Web Service Using HTTP Using a Proxy to Call an XML Web Service Creating an XML Web Service

3. Lesson: Overview of Using XML Web Services What is an XML Web Service? Why use XML Web Services? Finding an XML Web Service Multimedia: XML Web Service Execution Model

4. What is an XML Web Service? Programmable logic accessible by standard Web protocols Allows applications to send and receive information across the Internet Language, protocol, and platform independent Stateless architecture Can be asynchronous Based on an evolving W3C standard

5. Why Use XML Web Services? Internet Weather XML Web Service Exchange Rate XML Web Service Pick your destination: The weather Forecast calls for: The exchange rate is: We can fly you there for only: Rain Redmond $1.56 $1,999.98 Airfare Database Airfare XML Web Service Northwind Traders Travel Site

6. Finding an XML Web Service Publish XML Web service URL and description .disco .wsdl Web Service Proxy Web Form UDDI 1 2 3 4 5 6 1 2 3 4 5 Discover XML Web service Locate XML Web service URL Read .wsdl description Bind XML Web Service to Proxy Call XML Web Service from the Web Form by Proxy 6

7. Multimedia: XML Web Service Execution Model

8. Lesson: Calling an XML Web Service Using HTTP How to Call an XML Web Service Using HTTP Practice: Calling an XML Web Service Using HTTP

9. How to Call an XML Web Service Using HTTP Navigate to the XML Web service URL Select an XML Web service method Call the XML Web service method View the XML response 1 2 3 4

10. Practice: Calling an XML Web Service Using HTTP The Student will: Enter an XML Web Service URL on the instructor machine Select the XML Web service method to call Enter values for parameters View the returned XML Time: 5 Minutes

11. Lesson: Using a Proxy to Call an XML Web Service Using Proxies to Call XML Web Services How to Use a Proxy to Call an XML Web Service Instructor-Led Practice: Using a Proxy to Call an XML Web Service XML Web Service Error Handling Demonstration: Testing the Availability of an XML Web Service

12. Using Proxies to Call XML Web Services Appear the same as the original class, but do not contain application logic Use SOAP to interact with the XML Web Service Created from the ServiceName .asmx.wsdl file Add members to manage interactions with the XML Web service and support asynchronous calls Internet XML Web Service Proxy Web Form SOAP

13. How to Use a Proxy to Call an XML Web Service Create a Web reference for the XML Web Service Create an instance of the XML Web Service Call the Web methods of the XML Web Service Build the ASP.NET Web Application Sub Button1_Click(s As Object, e As EventArgs)... Dim ProxyGetStocks As New _ GetStocks.localhost.Service1() lblResults.Text = _ ProxyGetStocks.GetRating("Contoso") End Sub 1 2 3 4 C# Code Example

14. Instructor-Led Practice: Using a Proxy to Call an XML Web Service Create a new ASP.NET Web Application project Create a proxy for an XML Web service Test with a browser View the reference.vb or reference.cs file

15. XML Web Service Error Handling Service unavailable SOAP exceptions from XML Web Services GetStocks.StockWebRef.Service1 ProxyGetStocks = new GetStocks.StockWebRef.Service1(); ProxyGetStocks.Timeout = 10000; try { lblMessage.Text = ProxyGetStocks.GetRating(TextBox1.Text); } catch (Exception err) { lblMessage.Text = err.Message; } Visual Basic .NET Code Example

16. Demonstration: Testing the Availability of a XML Web Service Set a timeout error handling Try…Catch statement Slow the Web service Test the exception

17. Lesson: Creating an XML Web Service How to Create an XML Web Service XML Web Service Code Instructor-Led Practice: Creating an XML Web Service

18. How to Create an XML Web Service Create a new XML Web Service project in Visual Studio .NET Declare the WebMethod functions Build the XML Web Service project Test with a browser 1 2 3 4

19. XML Web Service Code .asmx page .asmx.vb page <%@ WebService Language=&quot;vb&quot; Codebehind=&quot;Service1.asmx.vb&quot; Class=&quot;XMLWebServiceName.Service1&quot; %> Imports System Imports System.Web.Services Class Service1 <WebMethod()> Public Function function1 () As type 'function_here End Function End Class C# Code Example

20. Instructor-Led Practice: Creating an XML Web Service Create an XML Web Service Test the XML Web Service Change the Namespace

21. Review Overview of Using XML Web Services Calling an XML Web Service Using HTTP Using a Proxy to Call an XML Web Service Creating an XML Web Service

22. Lab 13: Consuming and Creating XML Web Services Medical Medical.aspx Benefits Home Page Default.aspx Life Insurance Life.aspx Retirement Retirement.aspx Dental Dental.aspx Dentists Doctors Doctors.aspx Doctors Logon Page Login.aspx Registration Register.aspx Coho Winery Prospectus Prospectus.aspx XML Web Service dentalService1.asmx Page Header Header.ascx ASPState tempdb Lab Web Application User Control namedate.ascx Menu Component Class1.vb or Class1.cs XML Files Web. config