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102 lines
2.6 KiB
C#
102 lines
2.6 KiB
C#
using Study.DelegateSeries.Core.Calculator;
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using System;
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namespace Study.DelegateSeries.Core
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{
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/// <summary>
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/// 委托学习
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/// 使用：定义委托、实例化委托、调用委托
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/// </summary>
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public class StudyDelegate
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{
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/*
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* 委托系列学习
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* 1、委托概念
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* 2、定义与使用委托
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* 3、多播委托
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* 4、使用匿名方法
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* 5、使用Lamda表达式
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* 6、委托使用场景
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* 7、委托与事件
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* 8、委托与接口
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* 9、其它
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* 10、总结
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*/
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#region 定义委托,DeclareDelegate类
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#endregion
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#region 实例化委托
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/// <summary>
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/// 基础语法
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/// (c#1.0 开始提供)
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/// </summary>
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public CalculatorDelegate BaseInstance()
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{
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CalculatorDelegate operation = new CalculatorDelegate(new Addition().Add);
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return operation;
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}
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/// <summary>
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/// c#2.0 简写方法
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/// (基于类型推断)
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/// </summary>
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public CalculatorDelegate AutoTypeInstance()
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{
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CalculatorDelegate operation = new Subtraction().Difference;
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return operation;
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}
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/// <summary>
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/// c#2.0 匿名委托
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/// (使用匿名方法实例化的委托)
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/// </summary>
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public CalculatorDelegate AnonymousInstance()
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{
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//c# 2.0基础语法
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CalculatorDelegate operation = delegate (decimal a,decimal b) { return (a * b) * (a * b); };
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return operation;
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}
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/// <summary>
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/// c#3.0 Lambda表达式
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/// (实质："Lambda表达式"是一个匿名函数)
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/// </summary>
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public CalculatorDelegate LambdaInstance()
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{
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CalculatorDelegate operation = (decimal a,decimal b)=> { return a * a + b * b + 2 * a * b; };
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//自动推断
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CalculatorDelegate operation2 = (a,b) => { return a * a + b * b + 2 * a * b; };
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//{}只有一句时的简写
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CalculatorDelegate operation3 = (a, b) => a * a + b * b + 2 * a * b ;
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return operation;
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}
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#endregion
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#region 调用委托
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#endregion
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#region 闭包
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#endregion
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#region 多播委托
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#endregion
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#region 泛型委托
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#endregion
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#region 内置委托
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#endregion
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#region 委托与事件
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#endregion
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#region 委托与接口
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#endregion
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}
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}
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