{搞定;组;使用}在视图模型 [英] { get; set; } used in ViewModel

问题描述

我使用C＃与通过从控制器到视图的视图模型一个ViewModel一起。

I am using c# along with a ViewModel that passes the view model from the controller to the view.

在我的视图模型，以下似乎预期当它通过从视图中描述的信息反馈给控制器来工作：

In my view model, the following seems to work as expected as it passes the Description information from the view back to the controller:

    public string Description { get; set; } 

但是，如果我有以下的，也不会传回的描述。说明显示空

But if I have the following, it won't pass back the Description. Description shows null

 public string Description  

为什么
        {搞定;组; }

Why is the { get; set; }

如此重要？

推荐答案

我不知道很多关于asp.net MVC /剃须刀，但你的2 code样本之间的一个重要区别。

I dont know much about asp.net MVC / Razor, but there is an important difference between your 2 code samples.

public string Description { get; set; }  

创建一个属性，一旦编译，有在课堂生成的私人领域，与访问字段get / set方法。与声明的属性{获得;设置;}是等价的：

Creates a property, once compiled, there is a generated private field in the class, with get/set methods that access the field. A property declared with {get;set;} is the equivalent of:

    private string _description;
    public string Description
    {
        get
        {
            return _description;
        }
        set
        {
            this._description = value;
        }
    }

但是以下内容：

public string Description;

创建一个简单的公共领域。

Creates a simple public field.

我的猜测是，剃须刀使用反射来从视图模型得到的值，它可能会寻找一个属性，而不是一个字段。因此，它决定了属性不存在，因此返回null

My guess is that razor uses reflection to get values from the ViewModel, and it probably looks for a property, not a field. So it determines that the property does not exist, hence returning null

这篇关于{搞定;组;使用}在视图模型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！