vb.net ocr read text from pdf

vb.net ocr read text from pdf

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Specifies the encoding style of the messages. The options are Literal and Encoded. (The options are specified in code using the System.Web.Services.Description.SoapBindingUse enumeration.) Specifies whether the parameters are wrapped in a single element within the body of the SOAP message, or whether they are unwrapped. (The options are specified in code using the System.Web.Services.Protocols.SoapParameterStyle enumeration.) Specifies whether the Web service client will receive a response to their request, or whether the request will be one-way only (without a response). Associates a Web method with a specific operation within the binding that is specified for the Web service. The Web service binding is set at the Web service level using the WebServiceBinding serialization attribute. For example: [System.Web.Services.WebServiceBindingAttribute(Name= "StockTraderServiceSoap", Namespace="http:// www.bluestonepartners.com/schemas/StockTrader")] public class StockTraderProxy : System.Web.Services .Protocols.SoapHttpClientProtocol {} The namespace URI that defines the request elements. The name of the request element as it is defined in the applicable XSD schema file. The namespace URI that defines the response elements. The name of the response element as it is defined in the applicable XSD schema file.

As you can see, the label for the result gets updated to the value of the sum of the values of the text in the text boxes. Because lblResult is in the UpdatePanel control, and the ScriptManager control is set to enable partial rendering, clicking the button updates only the text within the UpdatePanel control. You will see and dissect more examples of this in 6.

In this chapter, we expanded on the previous discussion of message-oriented Web services and showed you a six-step process for designing and building a service-oriented Web service from scratch: Step 1: Create a dedicated type definition assembly. Step 2: Create a dedicated business assembly. Step 3: Create the Web service using the type definition assembly. Step 4: Implement the business interface in the Web service. Step 5: Delegate processing logic to the business assembly. Step 6: Create a Web service client. You saw how to build both tightly coupled clients and loosely coupled clients. In most SOA applications you will want to build loosely coupled clients, but under some circumstances you may want a higher level of control over the type definitions. Tightly coupled clients reference the same type definition as the assembly rather than generating their own using a proxy class. Finally, we discussed the service agent component, which is a special feature of serviceoriented applications. The service agent manages communication between a business assembly and an external Web service. It can also act as the intermediary between two or more Web services. The goal of this chapter is to help you rethink your approach to Web services design so that you can start thinking in terms of SOA.

Generate an Interface Definition File (Step 3)

The markup for the UpdatePanel control in the previous example is as follows:

Interface definition files (IDFs) can be generated in two ways: wsdl.exe: This command-line tool generates a full interface definition file (including abstract classes and types) based on a WSDL document. Table 3-2 summarizes selected command-line switches for the wsdl.xe utility. xsd.exe: This command-line tool generates the type section only for the interface definition file based on an XSD schema file. You can use this autogenerated file as a starting point and then manually insert the abstract class definitions for each of the Web service operations. Table 3-3 summarizes selected command-line switches for the xsd.exe utility. Table 3-2. wsdl.exe Selected Command-Line Switches

eb services technology has evolved rapidly since its debut a few years ago. Businesses were initially reluctant to fully adopt the technology because of a lack of industry-standard specifications to govern such important issues as message security and reliable delivery. Businesses will not send sensitive information across the wire if it is vulnerable to detection. And they will not implement large-scale distributed systems with this technology if the reliability of the messages cannot be guaranteed. This chapter lays the groundwork for the second half of the book, where we will focus intensively on how to implement WS- specifications using Microsoft s Web Services Enhancements 3.0 for .NET. This chapter includes the following: Overview of the WS- specifications Introduction to Web Services Enhancements (WSE) 3.0 Installing and configuring WSE 3.0, including the test certificates Using the WSE 3.0 utilities This chapter is a must-read in order to get the most out of the second half of the book. It will help you to understand the WS- specifications and how WSE fits into the context of SOA. It will also get you started with installing and configuring WSE 3.0, including the test certificates, which are required for many of the code samples.

<asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <asp:Label ID="lblResult" runat="server" Text="Label"></asp:Label> </ContentTemplate> </asp:UpdatePanel>

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