Figure 5-15 Adding a new object to the Class Designer in Visual C#

Generation Code-39 in Visual C# Figure 5-15 Adding a new object to the Class Designer

Figure 5-15 Adding a new object to the Class Designer
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Microsoft Visual Studio 2010: A Beginner s Guide
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Listing 5-3
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Code generated from the Class Designer
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using using using using System; SystemCollectionsGeneric; SystemLinq; SystemText;
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namespace ProjectDemo { /// <summary> /// Teaches Classes /// </summary> public class Teacher : Staff { /// <summary> /// Grade student papers /// </summary> /// <param name="papers">Papers to grade</param> public void GradePapers(List<string> papers) { throw new SystemNotImplementedException(); } } }
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''' <summary> ''' Teaches Classes ''' </summary> Public Class Teacher Inherits Staff ''' <summary> ''' Grade student papers ''' </summary> Public Sub GradePapers(ByVal papers As List(Of String)) End Sub End Class
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As shown in Listing 5-3, code generated from the Class Designer includes default using directives and the namespace as specified in project properties The class name, Teacher,
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5: Creating and Building Projects
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is the same as the visual object in the class diagram, and the GradePapers method is the same as specified in the Class Details window You can also see the comment on Teacher as specified in the Property window All that s left for you to do is replace the call to throw new SystemNotImplementedException with your own code in C# or just add your code to GradePapers in VB
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Summary
You should now know how to create a solution and a project You can set project properties and add new members to projects Additionally, you are able to add class libraries to a project and reference those class libraries from other projects that use those libraries If you prefer a more formal design process, VS offers the Class Designer, which you learned to use for both visualization and code generation The next chapter builds upon the coding process with VS by showing you how to debug code
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Debugging with Visual Studio
Microsoft Visual Studio 2010: A Beginner s Guide
Key Skills & Concepts
Exploring Available Debugging Tools Setting Breakpoints Inspecting Program State Solving Problems with VS Debugging Tools
ore often than we would like, our code has bugs Fortunately, when bugs do happen, you have a lot of help with VS This chapter shows you how to use the VS debugger to fix problems by setting breakpoints, stepping through code, and inspecting program state There s also a section on development-time tools to inspect the structure of your code Beyond setting breakpoints, you ll learn how to customize breakpoints and how to manage a list of breakpoints Then you ll see the options VS has for stepping through code This chapter also shows you many ways to see what the values of variables are in your code and the various tools available for inspecting your code First, we ll start with some example code you can use to practice the concepts learned in this chapter
Example Code for This
It would take many pages of code to show a complete program with all of the complexity of a real-world scenario, which might be hard to follow for the purposes of this chapter So, the example you ll see simulates the environment of a full application When performing debugging, you ll need to traverse hierarchies in code, where one method calls another, which could go multiple levels deep, depending on the program The example code will have multiple levels of method calls so that you can see how to use VS to debug code Listing 6-1 shows the example code for this chapter It s a console application, just like all of the applications created in previous chapters You create a console project by selecting File | New | Project, select the Console Application project, give the project a name, and generate the project by clicking OK The application in Listing 6-1 calculates a discount for a customer, based on a special discount percentage for that customer and what that customer ordered
6: Debugging with Visual Studio
Listing 6-1
Example code for chapter
C#: Programcs
using System; namespace DebugAndTestDemo { class Program { static void Main() { Customer cust = new Customer(); custDiscount = 1m; Order ord = new Order(); ordAddItem(500m); ordAddItem(250m); custOrder = ord; decimal discount = custGetOrderDiscount(); ConsoleWriteLine("Customer Discount: {0}", discount); ConsoleReadKey(); } } }
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