以字符串形式访问对象属性并设置其值 [英] Accessing object property as string and setting its value

问题描述

我有一个Account类的实例.每个帐户对象都有一个所有者，引用等.

I have an instance of the Account class. Each account object has an owner, reference, etc.

访问帐户属性的一种方法是通过

One way I can access an accounts properties is through accessors like

account.Reference;

但是我希望能够使用动态字符串选择器来访问它，例如:

but I would like to be able to access it using dynamic string selectors like:

account["PropertyName"];

就像在JavaScript中一样.因此，我将拥有account["Reference"]，它将返回该值，但我还希望能够在此之后分配一个新值，例如:

just like in JavaScript. So I would have account["Reference"] which would return the value, but I also would like to be able to assign a new value after that like:

account["Reference"] = "124ds4EE2s";

我注意到我可以使用

DataBinder.Eval(account,"Reference") 

要获取基于字符串的属性，但是使用该属性我无法为该属性分配值.

to get a property based on a string, but using this I can't assign a value to the property.

关于我该怎么做的任何想法?

Any idea on how I could do that?

推荐答案

首先，您应避免使用此方法. C#是一种强类型语言，因此请充分利用该方面带来的类型安全性和性能优势.

First of all, you should avoid using this; C# is a strongly-typed language, so take advantage of the type safety and performance advantages that accompany that aspect.

如果您有合理的理由动态获取和设置属性的值(换句话说，当代码中无法定义类型和/或属性名称时)，则必须使用反思.

If you have a legitimate reason to get and set the value of a property dynamically (in other words, when the type and/or property name is not able to be defined in the code), then you'll have to use reflection.

最内联的方式是这样的:

The most inline-looking way would be this:

object value = typeof(YourType).GetProperty("PropertyName").GetValue(yourInstance);
...
typeof(YourType).GetProperty("PropertyName").SetValue(yourInstance, "value");

但是，您可以缓存PropertyInfo对象以使其更具可读性:

However, you can cache the PropertyInfo object to make it more readable:

System.Reflection.PropertyInfo prop = typeof(YourType).GetProperty("PropertyName");

object value = prop.GetValue(yourInstance);
...
prop.SetValue(yourInstance, "value");

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