这在asp .net MVC中意味着什么？ ？ x => x.Id == 1？ [英] what does this mean in asp .net MVC ? ? x => x.Id == 1 ?

问题描述

x => x.Id == 1如何评估？

x => x.Id ==1 how is this evaluated ?

推荐答案

如果项目的ID为1，则评估为真。

It will evaluate to true if the Id of the item is 1.

public class MyData
{
    public int Id { get; set; }
    public string Name { get; set; }
}

List<MyData> data = new List<MyData>
{
    new MyData{ Id = 1, Name="One" },
    new MyData{ Id = 2, Name="Two" },
    new MyData{ Id = 3, Name="Three" }
};

IEnumerable<MyData> temp = data.Where(x => x.Id == 1);

// temp will have all MyData items in data where the Id is 1

foreach(MyData d in temp)
{
    System.Diagnostics.Debug.WriteLine(d.Name);
}

你好，

这叫做Lamda Expression。这个'=> '意味着'去'。然后调用方法或动作或功能。有关Lamda Expression的更多详情，请参阅

1. Link1
2. Link2

3. Link3
谢谢

Hello ,
That is called Lamda Expression . This' => 'means 'goes to' . and after that Invoke a method or action or Function . For more details on Lamda Expression refer
1. Link1
2. Link2
3. Link3
Thanks

x => x.ID == 1表示lamda表达式。

Asp.net或MVC不同，Lamda表达式是不同的东西。

但我们使用lamda表达式和Model类。

x=>x.ID==1 denotes lamda expressions.
Asp.net or MVC is differ and Lamda expression is different thing.
But we use lamda expression with Model classes.

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