LINQ to Objects系列(3)深入理解Lambda表达式

　　Lambda表达式是学好LINQ很重要的一个知识点，后面的LINQ查询中会大量地使用到Lambda表达式。这篇文章从以下几点进行总结。

1，Lambda表达式的前世今生

2，Lambda表达式的实际运用

Lambda表达式的前世今生

在没有Lambda表达式之前，我们一般使用原始方法或匿名方法来创建委托。而自从C#3.0中引入Lambda表达式后，我们可以在匿名方法的基础上使用Lambda表达式来创建委托，从而大大简化创建委托所需要的代码。下面通过一段代码演示Lambda表达式的来历。

namespace LINQDemo4.Lambda
{
    class Program
    {
        static void Main(string[] args)
        {
            //1,原始的创建委托实例
            Func<string, int> delegateByNormal = new Func<string, int>(CallBackMethod);

            //2,使用匿名方法创建委托
            Func<string, int> delegateByAnonymous = delegate(string text)
            {
                return text.Length;
            };

            //3,使用Lambda表达式创建委托
            Func<string, int> delegateByLambda = (string text) => text.Length;

            //4,Lambda表达式省略参数类型
            Func<string, int> delegateByLambda1 = (text) => text.Length;

            //5,只有一个输入参数时，可以继续省略括号
            Func<string, int> delegateByLambda2 = text => text.Length;

            //调用委托
            Console.WriteLine("字符串的长度为：{0}", delegateByLambda2("麦蒂"));
            Console.ReadKey();
        }

        /// <summary>
        /// 回调方法
        /// </summary>
        /// <param name="text"></param>
        /// <returns></returns>
        private static int CallBackMethod(string text)
        {
            return text.Length;
        }
    }
}

//输出结果：字符串的长度为：2

Lambda表达式的实际运用

这里通过按钮的点击事件来演示Lambda表达式的实际运用，代码如下。

namespace LINQDemo4.Lambda1
{
    class Program
    {
        static void Main(string[] args)
        {
            //Lambda表达式的实际运用
            //新建一个Button实例
            Button button = new Button {  Text="Click me"};

            //1, 使用匿名方法订阅事件
            //button.Click += delegate(object sender, EventArgs e)
            //{
            //    CallBackMethod("Click by Anonymous", sender, e);
            //};

            //2, 使用Lambda表达式来订阅事件
            button.Click += (sender, e) => CallBackMethod("Click by Lambda expression", sender, e);

            Form form = new Form
            {
                Name = "在控制台中创建的窗体",
                AutoSize = true,
                Controls = { button}
            };
            Application.Run(form);
        }

        /// <summary>
        /// 回调方法
        /// </summary>
        /// <param name="title"></param>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void CallBackMethod(string title, object sender, EventArgs e)
        {
            Console.WriteLine("发生的事件为:{0}",title);
            Console.WriteLine("发生的事件的对象为："+sender);
            Console.WriteLine("发生的事件的参数为:"+e.GetType());
        }
    }
}

程序运行结果为：

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" alt="" />

注：这篇文章的实例引用自'Learning Hard'的文章：http://www.cnblogs.com/zhili/archive/2012/12/12/LambdaExpression.html