如何设置通过反射对象属性 [英] How to set object property through Reflection

问题描述

我试图代码，将接受以下3个参数的方法：

I'm trying to code a method that will accept the following 3 arguments:

1. 对象（用户定义类型这将发生变化）

1. an Object (user defined type which will vary)

代表该对象

一个属性名的字符串字符串值，将必须从一个字符串赋值之前的属性的数据类型转换。

a string value, which will have to be converted from a string to the property's data type prior to assignment.

的方法签名会是这样的：

The method signature will look like this:

public void UpdateProperty(Object obj, string propertyName, string value)

我已经找到了如何检索与下面的代码反射属性值：

I've found how to retrieve a property value with Reflection with the following code:

PropertyInfo[] properties = target.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);

  foreach (PropertyInfo prop in properties)
  {
    if (string.Compare(prop.Name, propertyName, true) == 0)
    {
      return prop.GetValue(target, null).ToString();
    }
  }

现在的问题是，我无法弄清楚如何设置属性值。此外，该值在未来作为一个字符串，所以我必须要检查的属性的数据类型的值的数据类型之前，它可以转换和放大器;分配。

The problem is that I can't figure out how to set the property value. Also, the value is coming in as a string, so I have to check the data type of the value against the property's datatype before it can be cast & assigned.

任何帮助将不胜感激。

推荐答案

< A HREF =htt​​p://msdn.microsoft.com/en-us/library/xb5dd1f1.aspx相对=nofollow>的SetValue ，提供的 Convert.ChangeType 应该为你工作。使用您的代码：

SetValue with Convert.ChangeType should work for you. Using your code:

newValue = Convert.ChangeType(givenValue, prop.PropertyType);
prop.SetValue(target, newValue, null);

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