Strategy Design Pattern

A demo to illustrate the strategy design pattern

Strategy/SimDuck/SimDuck/App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
+    </startup>
+</configuration>

Strategy/SimDuck/SimDuck/Duck/AfricanBlackDuck.cs

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+using SimDuck.QuackBehavior;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck
+{
+    public class AfricanBlackDuck : Duck
+    {
+        public AfricanBlackDuck()
+        {
+            quackBehavior = new Quack();
+            flyBehavior = new FlyWithWing();
+        }
+    }
+}

Strategy/SimDuck/SimDuck/Duck/Duck.cs

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+using System;
+
+namespace SimDuck
+{
+    public class Duck
+    {
+        protected QuackBehavior.QuackBehavior quackBehavior;
+        protected FlyBehavior flyBehavior;
+
+        public virtual void PerformFly()
+        {
+            flyBehavior.DoFly();
+        }
+
+        public virtual void PeformQuack()
+        {
+            quackBehavior.DoQuack();
+        }
+
+        public void ShowDisplay()
+        {
+            Console.WriteLine(this.GetType());
+            PeformQuack();
+            PerformFly();
+            Console.WriteLine();
+        }
+    }
+}

Strategy/SimDuck/SimDuck/Duck/LittleYellowDuck.cs

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+using SimDuck.QuackBehavior;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck
+{
+    public class LittleYellowDuck : Duck
+    {
+        public LittleYellowDuck()
+        {
+            quackBehavior = new MuteQuack();
+            flyBehavior = new FlyNoWay();
+        }
+    }
+}

Strategy/SimDuck/SimDuck/Duck/RubberDuck.cs

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+using SimDuck.QuackBehavior;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck
+{
+    public class RubberDuck : Duck
+    {
+       public RubberDuck()
+        {
+            quackBehavior = new Squeak();
+            flyBehavior = new FlyNoWay();
+        }
+    }
+}

Strategy/SimDuck/SimDuck/FlyBehavior/FlyBehavior.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck
+{
+    public class FlyBehavior
+    {
+        public virtual void DoFly()
+        {
+
+        }
+
+    }
+}

Strategy/SimDuck/SimDuck/FlyBehavior/FlyNoWay.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck
+{
+    public class FlyNoWay : FlyBehavior
+    {
+        public override void DoFly()
+        {
+            Console.WriteLine("I can not fly");
+        }
+    }
+}

Strategy/SimDuck/SimDuck/FlyBehavior/FlyWithWing.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck
+{
+    public class FlyWithWing : FlyBehavior
+    {
+        public override void DoFly()
+        {
+            Console.WriteLine("Fly with Wing");
+        }
+    }
+}

Strategy/SimDuck/SimDuck/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Duck[] duckArray = new Duck[3];
+            duckArray[0] = new AfricanBlackDuck();
+            duckArray[1] = new LittleYellowDuck();
+            duckArray[2] = new RubberDuck();
+            for(int i = 0; i < duckArray.Length; i++)
+            {
+                duckArray[i].ShowDisplay();
+            }
+            Console.Read();
+        }
+    }
+}

Strategy/SimDuck/SimDuck/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// 有关程序集的一般信息由以下
+// 控制。更改这些特性值可修改
+// 与程序集关联的信息。
+[assembly: AssemblyTitle("SimDuck")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("SimDuck")]
+[assembly: AssemblyCopyright("Copyright ©  2016")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+//将 ComVisible 设置为 false 将使此程序集中的类型
+//对 COM 组件不可见。  如果需要从 COM 访问此程序集中的类型，
+//请将此类型的 ComVisible 特性设置为 true。
+[assembly: ComVisible(false)]
+
+// 如果此项目向 COM 公开，则下列 GUID 用于类型库的 ID
+[assembly: Guid("72763a8b-5264-4e3b-931c-7528e2457ccd")]
+
+// 程序集的版本信息由下列四个值组成: 
+//
+//      主版本
+//      次版本
+//      生成号
+//      修订号
+//
+//可以指定所有这些值，也可以使用“生成号”和“修订号”的默认值，
+// 方法是按如下所示使用“*”: :
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

Strategy/SimDuck/SimDuck/QuackBehavior/MuteQuack.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck.QuackBehavior
+{
+    public class MuteQuack : QuackBehavior
+    {
+        public override void DoQuack()
+        {
+            Console.WriteLine("Can't Quack");
+        }
+    }
+}

Strategy/SimDuck/SimDuck/QuackBehavior/Quack.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck.QuackBehavior
+{
+    public class Quack : QuackBehavior
+    {
+        public override void DoQuack()
+        {
+            Console.WriteLine("Quack With Mouth");
+        }
+    }
+}

Strategy/SimDuck/SimDuck/QuackBehavior/QuackBehavior.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck.QuackBehavior
+{
+    public class QuackBehavior
+    {
+        public virtual void DoQuack()
+        {
+
+        }
+    }
+}

Strategy/SimDuck/SimDuck/QuackBehavior/Squeak.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimDuck.QuackBehavior
+{
+    public class Squeak : QuackBehavior
+    {
+        public override void DoQuack()
+        {
+            Console.WriteLine("Squeak Squeak Squeak");
+        }
+    }
+}

Strategy/SimDuck/SimDuck/SimDuck.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{72763A8B-5264-4E3B-931C-7528E2457CCD}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>SimDuck</RootNamespace>
+    <AssemblyName>SimDuck</AssemblyName>
+    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <IsWebBootstrapper>false</IsWebBootstrapper>
+    <PublishUrl>publish\</PublishUrl>
+    <Install>true</Install>
+    <InstallFrom>Disk</InstallFrom>
+    <UpdateEnabled>false</UpdateEnabled>
+    <UpdateMode>Foreground</UpdateMode>
+    <UpdateInterval>7</UpdateInterval>
+    <UpdateIntervalUnits>Days</UpdateIntervalUnits>
+    <UpdatePeriodically>false</UpdatePeriodically>
+    <UpdateRequired>false</UpdateRequired>
+    <MapFileExtensions>true</MapFileExtensions>
+    <ApplicationRevision>1</ApplicationRevision>
+    <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
+    <UseApplicationTrust>false</UseApplicationTrust>
+    <PublishWizardCompleted>true</PublishWizardCompleted>
+    <BootstrapperEnabled>true</BootstrapperEnabled>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup>
+    <ManifestCertificateThumbprint>4CC3A0DF6134FAA6E6B1D13261B7E142B957DA51</ManifestCertificateThumbprint>
+  </PropertyGroup>
+  <PropertyGroup>
+    <ManifestKeyFile>SimDuck_TemporaryKey.pfx</ManifestKeyFile>
+  </PropertyGroup>
+  <PropertyGroup>
+    <GenerateManifests>true</GenerateManifests>
+  </PropertyGroup>
+  <PropertyGroup>
+    <SignManifests>true</SignManifests>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Duck\AfricanBlackDuck.cs" />
+    <Compile Include="Duck\Duck.cs" />
+    <Compile Include="FlyBehavior\FlyBehavior.cs" />
+    <Compile Include="FlyBehavior\FlyNoWay.cs" />
+    <Compile Include="FlyBehavior\FlyWithWing.cs" />
+    <Compile Include="Duck\LittleYellowDuck.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="QuackBehavior\MuteQuack.cs" />
+    <Compile Include="QuackBehavior\Quack.cs" />
+    <Compile Include="QuackBehavior\QuackBehavior.cs" />
+    <Compile Include="QuackBehavior\Squeak.cs" />
+    <Compile Include="Duck\RubberDuck.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+    <None Include="SimDuck_TemporaryKey.pfx" />
+  </ItemGroup>
+  <ItemGroup>
+    <BootstrapperPackage Include=".NETFramework,Version=v4.5.2">
+      <Visible>False</Visible>
+      <ProductName>Microsoft .NET Framework 4.5.2 %28x86 和 x64%29</ProductName>
+      <Install>true</Install>
+    </BootstrapperPackage>
+    <BootstrapperPackage Include="Microsoft.Net.Framework.3.5.SP1">
+      <Visible>False</Visible>
+      <ProductName>.NET Framework 3.5 SP1</ProductName>
+      <Install>false</Install>
+    </BootstrapperPackage>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>