MSDN Magazine - April 2008 - (Page 57) to use an object-oriented programming language instead of XML tags. From a business perspective, a .NET Framework-based IVR allows the business to utilize investments they have already made in Microsoft technologies by being able to reuse existing business and data-access logic. Another benefit is finding key resources. Try asking a hiring manager or recruiter to find you a developer using VoiceXML and a developer using .NET. Which one do you think they’ll be able to find first? There are just more developers around who use .NET. Voice Response Workflow Much like an ASP.NET page, the logic of a Voice Response Workflow consists of a partial class in two files, one containing the Visual Studio®-generated code and the other containing your code (called the code-beside). Voice Response Workflows use Speech Dialog activities as well as standard Windows WF activities. The Visual Studio toolbox contains both activity types. The first step in developing an IVR application is to lay out the call flow. In Visual Studio you do that by dragging the Speech Workflow activities onto the Speech Workflow canvas and arranging them in the order you want the activities to execute, as shown in Figure 1. For an IVR application that responds to inbound calls, the first activity is typically AnswerCall and the last activity is typically DisconnectCall, so these activities are added to the Speech Workflow automatically upon creating a new Voice Response Workflow. Speech activities execute in order, from top to bottom, by default. Although Voice Response Workflow applications are based on Windows WF, they only support sequential workflows, not state machine workflows. The two most commonly used activities are Statement and QuestionAnswer. Using just these two activities you can develop a fairly simple IVR application with minimal effort. Both activities speak to the user either using Text-to-Speech (TTS) or prerecorded prompts. The QuestionAnswer activity varies from the Statement activity in that while the Statement activity only speaks to the user, Figure 1 Voice Response Workflow Designer april2008 57
Table of Contents Feed for the Digital Edition of MSDN Magazine - April 2008 MSDN Magazine - April 2008 Contents Toolbox CLR Inside Out Basic Instincts Cutting Edge Foundations Test Run Service Station Windows with C++ Going Places { End Bracket } MSDN Magazine - April 2008 MSDN Magazine - April 2008 - (Page Intro) MSDN Magazine - April 2008 - Contents (Page Cover1) MSDN Magazine - April 2008 - Contents (Page Cover2) MSDN Magazine - April 2008 - Contents (Page 1) MSDN Magazine - April 2008 - Contents (Page 2) MSDN Magazine - April 2008 - Contents (Page 3) MSDN Magazine - April 2008 - Contents (Page 4) MSDN Magazine - April 2008 - Contents (Page 5) MSDN Magazine - April 2008 - Contents (Page 6) MSDN Magazine - April 2008 - Contents (Page 7) MSDN Magazine - April 2008 - Contents (Page 8) MSDN Magazine - April 2008 - Contents (Page 9) MSDN Magazine - April 2008 - Contents (Page 10) MSDN Magazine - April 2008 - Toolbox (Page 11) MSDN Magazine - April 2008 - Toolbox (Page 12) MSDN Magazine - April 2008 - Toolbox (Page 13) MSDN Magazine - April 2008 - Toolbox (Page 14) MSDN Magazine - April 2008 - Toolbox (Page 15) MSDN Magazine - April 2008 - Toolbox (Page 16) MSDN Magazine - April 2008 - CLR Inside Out (Page 17) MSDN Magazine - April 2008 - CLR Inside Out (Page 18) MSDN Magazine - April 2008 - CLR Inside Out (Page 19) MSDN Magazine - April 2008 - CLR Inside Out (Page 20) MSDN Magazine - April 2008 - CLR Inside Out (Page 21) MSDN Magazine - April 2008 - CLR Inside Out (Page 22) MSDN Magazine - April 2008 - CLR Inside Out (Page 23) MSDN Magazine - April 2008 - CLR Inside Out (Page 24) MSDN Magazine - April 2008 - Basic Instincts (Page 25) MSDN Magazine - April 2008 - Basic Instincts (Page 26) MSDN Magazine - April 2008 - Basic Instincts (Page 27) MSDN Magazine - April 2008 - Basic Instincts (Page 28) MSDN Magazine - April 2008 - Basic Instincts (Page 29) MSDN Magazine - April 2008 - Basic Instincts (Page 30) MSDN Magazine - April 2008 - Basic Instincts (Page 31) MSDN Magazine - 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April 2008 - Foundations (Page 91) MSDN Magazine - April 2008 - Foundations (Page 92) MSDN Magazine - April 2008 - Foundations (Page 93) MSDN Magazine - April 2008 - Foundations (Page 94) MSDN Magazine - April 2008 - Foundations (Page 95) MSDN Magazine - April 2008 - Foundations (Page 96) MSDN Magazine - April 2008 - Foundations (Page 97) MSDN Magazine - April 2008 - Foundations (Page 98) MSDN Magazine - April 2008 - Test Run (Page 99) MSDN Magazine - April 2008 - Test Run (Page 100) MSDN Magazine - April 2008 - Test Run (Page 101) MSDN Magazine - April 2008 - Test Run (Page 102) MSDN Magazine - April 2008 - Test Run (Page 103) MSDN Magazine - April 2008 - Test Run (Page 104) MSDN Magazine - April 2008 - Test Run (Page 105) MSDN Magazine - April 2008 - Test Run (Page 106) MSDN Magazine - April 2008 - Service Station (Page 107) MSDN Magazine - April 2008 - Service Station (Page 108) MSDN Magazine - April 2008 - Service Station (Page 109) MSDN Magazine - April 2008 - Service Station (Page 110) MSDN Magazine - April 2008 - Service Station (Page 111) MSDN Magazine - April 2008 - Service Station (Page 112) MSDN Magazine - April 2008 - Service Station (Page 113) MSDN Magazine - April 2008 - Service Station (Page 114) MSDN Magazine - April 2008 - Windows with C++ (Page 115) MSDN Magazine - April 2008 - Windows with C++ (Page 116) MSDN Magazine - April 2008 - Windows with C++ (Page 117) MSDN Magazine - April 2008 - Windows with C++ (Page 118) MSDN Magazine - April 2008 - Windows with C++ (Page 119) MSDN Magazine - April 2008 - Windows with C++ (Page 120) MSDN Magazine - April 2008 - Windows with C++ (Page 121) MSDN Magazine - April 2008 - Windows with C++ (Page 122) MSDN Magazine - April 2008 - Going Places (Page 123) MSDN Magazine - April 2008 - Going Places (Page 124) MSDN Magazine - April 2008 - Going Places (Page 125) MSDN Magazine - April 2008 - Going Places (Page 126) MSDN Magazine - April 2008 - Going Places (Page 127) MSDN Magazine - April 2008 - { End Bracket } (Page 128) MSDN Magazine - April 2008 - { End Bracket } (Page Cover3) MSDN Magazine - April 2008 - { End Bracket } (Page Cover4)
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