Specifies the Internet proxy to be used. Defaults to the system proxy settings. in VB.NET

Making Code 128B in VB.NET Specifies the Internet proxy to be used. Defaults to the system proxy settings.

Specifies the Internet proxy to be used. Defaults to the system proxy settings.
Paint Code 128 In Visual Basic .NET
Using Barcode creator for Visual Studio .NET Control to generate, create Code 128C image in VS .NET applications.
www.OnBarcode.com
Decoding Code-128 In Visual Basic .NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
The following statement illustrates how to create a proxy for the example SumService XML Web service developed earlier in this chapter, accepting the default settings for the commandline options:
Bar Code Encoder In VB.NET
Using Barcode encoder for .NET Control to generate, create barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Decode Bar Code In Visual Basic .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
wsdl http://localhost/SumService/SumService.asmx
Making Code 128 Code Set A In C#.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create Code 128A image in VS .NET applications.
www.OnBarcode.com
Code 128 Code Set B Generator In VS .NET
Using Barcode creation for ASP.NET Control to generate, create Code 128 Code Set C image in ASP.NET applications.
www.OnBarcode.com
19. Introduction to XML Web Services
Print Code 128C In .NET
Using Barcode generation for .NET Control to generate, create Code-128 image in Visual Studio .NET applications.
www.OnBarcode.com
Draw Data Matrix ECC200 In Visual Basic .NET
Using Barcode printer for .NET framework Control to generate, create Data Matrix 2d barcode image in .NET applications.
www.OnBarcode.com
The statement generates a C# source file named Sum.cs containing a proxy class for the XML Web service. Proxy classes can be created for XML Web services that haven't been created with .NET; the URL that is passed to the wsdl.exe tool must point to the WSDL document for the service.
Print GTIN - 13 In Visual Basic .NET
Using Barcode encoder for VS .NET Control to generate, create EAN13 image in Visual Studio .NET applications.
www.OnBarcode.com
Bar Code Maker In Visual Basic .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create bar code image in .NET applications.
www.OnBarcode.com
Using a Proxy Class
Code 128C Creator In Visual Basic .NET
Using Barcode generation for Visual Studio .NET Control to generate, create Code 128 Code Set C image in .NET framework applications.
www.OnBarcode.com
2 Of 7 Code Encoder In VB.NET
Using Barcode printer for .NET Control to generate, create Code 2 of 7 image in .NET framework applications.
www.OnBarcode.com
Using a proxy class is no different from using any other class. The following example demonstrates a class that relies on the proxy just created, which we have saved in a source file named SumClient.cs:
Scan EAN 128 In C#.NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
1D Barcode Creation In C#
Using Barcode encoder for .NET Control to generate, create 1D image in Visual Studio .NET applications.
www.OnBarcode.com
public class SumClient { static void Main(string[] p_args) { Sum x_sum = new Sum(); int x_result = x_sum.sumNumbers(10, 20); System.Console.WriteLine("Result: " + x_result); } }
Create PDF417 In VS .NET
Using Barcode encoder for Reporting Service Control to generate, create PDF417 image in Reporting Service applications.
www.OnBarcode.com
Make Matrix 2D Barcode In .NET
Using Barcode generation for .NET framework Control to generate, create 2D Barcode image in VS .NET applications.
www.OnBarcode.com
The statements related to the proxy class are marked in boldface. We create a new instance of the Sum proxy class and invoke the sumNumbers method. Each of the methods exposed by the XML Web service is represented by a C# method. The client class and the proxy are compiled using the following statement:
Painting UCC-128 In None
Using Barcode printer for Microsoft Word Control to generate, create UCC.EAN - 128 image in Microsoft Word applications.
www.OnBarcode.com
PDF 417 Decoder In Visual Studio .NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
csc /out:SumClient.exe SumClient.cs Sum.cs
Creating QR Code 2d Barcode In Java
Using Barcode generation for BIRT Control to generate, create QR Code ISO/IEC18004 image in Eclipse BIRT applications.
www.OnBarcode.com
ANSI/AIM Code 39 Printer In Visual C#
Using Barcode generation for Visual Studio .NET Control to generate, create Code-39 image in .NET applications.
www.OnBarcode.com
This statement creates an executable named SumClient.exe, which will automatically invoke the XML Web service as required.
More Information
For more information about using the C# compiler, see 4.
Executing the SumClient application will generate the following output:
Result: 30
Asynchronous Programming
For each XML Web service method, three methods are automatically created in the proxy class, as described in Table 19-7.
19. Introduction to XML Web Services
Table 19-7. The XML Web Service Proxy Class Methods
Description Sends a message to the XML Web service synchronously. Begin< Web Service Method Name > Begins the process of sending a message to the XML Web service asynchronously. Ends the process of sending an asynchronous End< Web Service Method Name > message. Using the synchronous method is shown in the preceding section; this section deals with using XML Web services asynchronously, which follows the general model for all .NET asynchronous features. The following example shows a client that makes asynchronous use of the example XML Web service:
using System; public class AsyncSumClient { static void Main(string[] p_args) { Sum x_sum = new Sum(); AsyncCallback x_callback = new AsyncCallback(AsyncSumClient.SumCallBack); x_sum.BeginsumNumbers(10, 20, x_callback, x_sum); Console.ReadLine(); } static void SumCallBack(IAsyncResult p_callback) { Sum x_sum = (Sum)p_callback.AsyncState; int x_result = x_sum.EndsumNumbers(p_callback); System.Console.WriteLine("Result: " + x_result); } }
Proxy Class Method < Web Service Method Name >
The statements that relate to asynchronous support are marked in boldface. The request is started by calling the BeginsumNumbers method, passing in the arguments to the Web method, a delegate that references the SumCallBack method, and the instance of the proxy class that is being used. When the request has completed, the SumCallBack method is invoked, and we use the AsyncState property of the IAsyncResult to obtain the instance of the proxy class; the results of the request are obtained by calling the EndsumNumbers method.
Summary
XML Web services rely on IIS and tight integration with the underlying platform. However, creating and deploying XML Web services is a simple task, and the support for testing them with a Web browser makes debugging simple and quick.
Appendix A. Platform Integration
Appendix A. Platform Integration
Java programmers who develop applications for the Microsoft Windows platform will be pleasantly surprised by the integration features provided by the Microsoft .NET Framework. In this appendix, we'll demonstrate the integration between .NET and some of the more commonly used Windows features, including the following:
The operating system runtime environment System processes The Windows registry The event log Windows Services
All of these features are supported directly by .NET classes without intermediate mechanisms such as Java Native Interface (JNI), COM, or native DLLs; however, the behavior of these features depends on the version of Windows being used and could affect the future portability of an application's code. The majority of the features described in this appendix require that the executing code or the current user have the necessary security permission to carry out the desired action. A full description of .NET Framework security is included in 17, "Security and Cryptography"; consult the Windows documentation for details of platform security.
Copyright © OnBarcode.com . All rights reserved.