Complete set: Intro to C - Bill Buchanan

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7.3.1 Read-only fields A property with only a get accessor is read‐only, whereas a property with only a set is write‐only. If it has both a set and get assess it is a read/write property. It is important to encapsulate the class correctly so that the objects cannot be accessed in an incorrect way. For example if we change the Cost property to make it read‐only: public double Cost { get { return cost; } } and try to use it: car1.Cost=15000; The builder will return an error of: Property or indexer 'sample01.Car.Cost' cannot be assigned to -- it is read only But, we could use it, such as: Console.WriteLine("The cost is " + car1.Cost); 7.4 Defining Object-Oriented Systems duction to .NET Intro Classes exist within a structure and interlink with others. For example if we think animals we can group them animals into a generalisation, which has a common behaviour and characteristics. We could then sub‐divide mammals up into different classifications, such cats, dog and horses (as illustrated in Figure 7.1). From there we can further subdivide until we get to actual species. Thus we generalise at the top of the hierarchy, and specialise as we move down it. In object‐orient techniques, we create a hierarchy such as this, which starts with generalised class, which then future sub‐divide into specialisations. In C# the top level is System namespace, which has certain splits of into other namespaces, such as Windows, IO, and Drawing, as illustrated in Figure 7.2. Below System.Windows is System.Windows.Forms, which has a number of classes assigned to it. These include: • Form. To add a form. • TextBox. Which creates a textbox. • ComboBox. Which creats a combobox. • ScrollBar. Which creates a scrollbar. Agilent .NET Course: Objects 8
Mammals Increasing generalisation Cats Cats Dogs Dogs Horses Horses Lion Lion Tiger Tiger Domestic Shared behaviours and characteristics Increasing specialisation Figure 7.1: Animal classifications containers System System Increasing generalisation Windows IO IO Drawing duction to .NET Intro Component Component Model Model Design Design Forms Forms Label Label Combo Combo Box Box Button Button Form Form Class Figure 7.2: Object hierarchy in C# Increasing specialisation Agilent .NET Course: Objects 9
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Name: Course: Introduction to .NET
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Thus, we have three choices of shap
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Finally, for this section, Program
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1.3.1 Win32 API The Win32 API libra
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VB VB ASP ASP ASP ASP VBA VBA VB VB
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Volume in drive C has no label. Vol
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Module01_01.sln Module01_01.sln Mic
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1.4.2 Using the environment Figure
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Figure 1.17: Object browsing for ot
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1.6 Basic elements of a C# program
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System.Console.Write("Enter real va
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2 Module 2 Basics of C# 2.1 Introdu
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2.4 Casting Objects Sometimes we ne
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2.6 The Convert class The convert c
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2.7.1 Examples of output of the Dat
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2.9 StreamReader The StreamReader c
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2.11 CIA tutorial (1) In this tutor
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3 Arrays and Collections 3.1 Introd
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inputValues = new double[5]; which
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4 is YELLOW 5 is GREEN Program 3.3
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3.3 Reading from a CSV file One of
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ow. This is similar to a spreadshee
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• System.Runtime.Serialization
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class ArrayExample02 { static void
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Sample Run 3.8 Average is 4.7142857
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Key IsFixedSize IsReadOnly Value Ge
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Complete set: Intro to C - Bill Buchanan

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