TEAM FLY PRESENTS in .NET framework

Generation EAN 13 in .NET framework TEAM FLY PRESENTS
TEAM FLY PRESENTS
EAN13 Encoder In VS .NET
Using Barcode creator for .NET framework Control to generate, create GS1 - 13 image in Visual Studio .NET applications.
Catch ex As Exception MessageBoxShow(exMessage) End Try End Sub
Reading UPC - 13 In VS .NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
In the example in listing 7-15, I create a new DOM document called doc and uses it to load an invoice document from the file BadInvoicexml This document has an error in the <subTotal> element which contains a string instead of a number Next, I instantiate the Web service proxy called ws, set it to use ProxyTrace just so I can capture the SOAP mesasges, and then I call ReceiveInvoice passing it the document element of the invoice document (ie the topmost element with all its children) I pass the document element rather than the document itself because I don t want to pass the XML declaration That s because XML declarations, eg < xml version="10" encoding="utf-8" > are not allowed in a SOAP message per the SOAP specification The interesting part is the first Catch block where I handle any SoapExceptions First I create a stringbuilder then append to it the exception s message I then loop through each child element of detail and append the element s name and text When done, I report the entire string in a MessageBox which looks like the one in figure 7-3 If the type of exception anything other than SoapException, the second Catch block catches that and displays the exception s message Other exception types you might get include SystemNetWebException which indicates a Web-related error such as server down or file not found errors
Making Bar Code In VS .NET
Using Barcode drawer for VS .NET Control to generate, create bar code image in .NET framework applications.
Figure 7-3 Displaying custom error information from SoapException
Bar Code Decoder In VS .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
It s always a good idea to present rich error information to your clients to help them figure out the cause of the problem Using custom XML elements and SoapException, you can communicate rich, structured error information from the service in a standard, SOAP-compliant way
European Article Number 13 Drawer In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create EAN13 image in ASP.NET applications.
Summary
Bar Code Generator In VS .NET
Using Barcode generator for .NET framework Control to generate, create barcode image in Visual Studio .NET applications.
In this chapter you learned how to use SOAP headers to extend the SOAP protocol by sending extra information in request and response messages and indicating whether those headers are required You also learned how to communicate error information in a standard way using <soap:Fault> so that Web service
Barcode Printer In VS .NET
Using Barcode printer for .NET Control to generate, create bar code image in VS .NET applications.
TEAM FLY PRESENTS
Paint Data Matrix 2d Barcode In .NET Framework
Using Barcode encoder for .NET Control to generate, create Data Matrix 2d barcode image in .NET framework applications.
clients on any platform can access this error information The next chapters build on this knowledge and discuss common tasks such as handling relational and structured data in Web services and more advanced tasks such as extending NET Web services Framework using SoapExtensions
Draw EAN128 In .NET Framework
Using Barcode creation for .NET framework Control to generate, create EAN 128 image in Visual Studio .NET applications.
TEAM FLY PRESENTS
Identcode Generator In .NET Framework
Using Barcode encoder for .NET framework Control to generate, create Identcode image in Visual Studio .NET applications.
8 Interface-Based Web Service Development
Code 3/9 Generation In VB.NET
Using Barcode creation for Visual Studio .NET Control to generate, create Code-39 image in VS .NET applications.
Interface-based programming was popularized with component-based development in the 90 s Using technologies like COM, you could define an interface then have several components that implement it Clients could then utilize any of those components by programming against the interface As your Web services evolve and mature, you will find the need to factor out Web service methods into interfaces, implement existing standard interfaces on your Web services, and program clients against an interface rather than a specific Web service Interfaces can also be useful for versioning Web services by leaving the old interface intact and implementing a new interface on the same service WSDL bindings make all this possible In 4 you learned all about WSDL bindings and how they define a concrete set of operations and provide the information needed to invoke those operations A Web service then implements one or more binding and exposes them at a particular location defined by the port If you haven t read 4, you can still read this chapter and learn how to do interface-based programming However, you will get a lot more out of this chapter if you first read 4
UCC - 12 Decoder In .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET applications.
Defining Interfaces
ANSI/AIM Code 128 Decoder In .NET Framework
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET framework applications.
The first step in interface-based programming is to define the interfaces you want to implement In my opinion, when you build a Web service you should always start with defining the interface Today, tools like Visual Studio NET do not provide direct support for that I am hopeful that future versions of those tools will provide the needed support for defining Web service interfaces Although you can use notepad to create a WSDL document from scratch, you ll probably want a more productive and less error-prone way to define your interfaces An easy way to define a Web service interface is to create a Web service and define the Web methods you want the interface to have If you have parameters with complex types, you define those types in schemas first then use xsdexe to generate classes from the schemas (see chapter 2 for more information on xsdexe) By default, all of a Web service s methods belong to the same binding and that binding (ie interface) has the same name as the Web service class with the word Soap appended If you ve created COM components in Visual Basic, you may know that each component you create has a default interface which is given the name _ClassName so the concept of auto-generated interfaces shouldn t be new to you To control the binding s name and namespace, you use the WebServiceBinding attribute on the Web service class and specify that binding s name and namespace Then on each Web method that the service exposes, you add SoapDocumentMethod or SoapRpcMethod and set its Binding property to the binding name Listing 8-1 shows an example class called SupplierIface1 which exposes its methods in a binding called ISupplier
Create UCC - 12 In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create GS1 - 12 image in ASP.NET applications.
Listing 8-1 A Web service example which exposes a binding called ISupplier (VBWSBook\8 \Supplier1asmxvb)
Scanning Code 39 In Visual Studio .NET
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET framework applications.
Namespace Supplier1 Public Structure Order Public CustomerEmail As String Public ShipVia As Shipper Public ShipName As String Public ShipAddress As String Public ShipCity As String Public ShipState As String Public ShipZipCode As String Public OrderItems() As OrderItem 'array of OrderItems End Structure
Make Barcode In Visual Basic .NET
Using Barcode encoder for .NET Control to generate, create barcode image in VS .NET applications.
Print Data Matrix ECC200 In Visual Basic .NET
Using Barcode creation for .NET Control to generate, create Data Matrix image in Visual Studio .NET applications.
Creating Barcode In Java
Using Barcode generation for Java Control to generate, create barcode image in Java applications.