ean 13 c# Creating an XML Web Service in C#.NET

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Creating an XML Web Service
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4. On the File menu, click Add, New Web Site. Select the ASP.NET Web Site tem plate, enter MyWebServiceClient as the project name, and click OK. 5. Right-click the new project file and click Add Web Reference. In the Add Web Reference dialog box select Web Services In This Solution. 6. Click the MyWebService link, enter the name WebService in the Web Reference Name text box, and click Add Reference. 7. Right-click the Default.aspx file in Solution Explorer and click View Designer. 8. Click the Toolbox and drag a DropDownList control onto the design surface. Click the design surface to close the DropDownList Tasks window and then click the control. In the Properties window, set the ID property to ddlVendors. 9. Click the Toolbox and drag an XMLDataSource control onto the design surface. Click the design surface to close the XmlDataSource Tasks window. 10. Double-click the design surface to open the Page_load method in the code win dow. Add the following code to this method:
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'VB Dim ws As New WebService.MyWebService
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XmlDataSource1.Data = ws.GetVendorList
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ddlVendors.DataSource = XmlDataSource1
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ddlVendors.DataTextField = "name"
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ddlVendors.DataValueField = "vendorid"
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ddlVendors.DataBind()
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//C# WebService.MyWebService ws = new WebService.MyWebService();
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XmlDataSource1.Data = ws.GetVendorList();
ddlVendors.DataSource = XmlDataSource1;
ddlVendors.DataTextField = "name";
ddlVendors.DataValueField = "vendorid";
ddlVendors.DataBind();
11. Right-click the MyWebServiceClient project in Solution Explorer and click Set As StartUp Project. 12. Right-click the Default.aspx file in Solution Explorer and click Set As Start Page. 13. Build the project, and resolve any errors. 14. On the Debug menu, click Start Debugging (or press F5). The default.aspx page should open in a Web browser and display a single drop-down list box that lists all the active vendors in the AdventureWorks database.
Lesson 3: How to Test and Consume a Web Service
Lesson Summary
You can verify that the results returned from a Web service method are valid by using a debugging session from the Web service project. You can then step through the project and use Visual Studio s debug commands to identify prob lems with your Web service. Alternatively, you can invoke the Web method directly by browsing to the URL for the Web service file (the file with the .asmx extension). The results from a Web service can also be verified by creating a client ASP.NET application that consumes Web methods from your Web service. By testing in this manner, you ensure that consumers of your Web service will be able to effec tively utilize the data returned from your method.
Lesson Review
You can use the following questions to test your knowledge of the information in Les son 3, How to Test and Consume a Web Service. The questions are also available on the companion CD if you prefer to review them in electronic form.
NOTE
Answers
Answers to these questions and explanations of why each answer choice is right or wrong are located in the Answers section at the end of the book.
1. What page is used to display a list of links to your Web service A. The Service method help page B. The Service help page C. The Web method help page D. All of the above 2. What methods can be used to verify the results of your Web service (Select all that apply.) A. Calling the Web service directly by browsing to the .asmx file B. Using the Web service Object Browser to invoke a particular Web method C. Using a debugging session within the Web service project to step through the code D. Creating an ASP.NET client application to consume a particular Web ser vice method
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Creating an XML Web Service
3. What steps are required when creating an application to test your Web service (Select all that apply.) A. Create a Web reference and point it to the .asmx file for your Web service. B. Create a routine that publishes your Web service to the destination Web server. C. Instantiate a new variable that points to the new Web reference. D. Call the Web method and access the results using the variable created in option C.
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