举例：

存在一个类：

Public Class Student{ public string name; public int age;}Student stu1 = new Student();

现在，我们想通过反射在运行时给stu1的name 和 age字段 赋值，让name = “小明”,age = 15，怎么做?

简单的代码如下:

...略using System.Reflection;//反射类...略static void Main(string[] args){ Type t = stu1.GetType(); FieldInfo filedInfo1 = t.GetField(”name"); FieldInfo filedInfo2 = t.GetField(”age"); fieldInfo1.SetValue(stu1,"小明"); fieldInfo2.SetValue(stu1,15);}

需要注意的是:FieldInfo的SetValue方法有可能会导致异常，比如 fieldInfo2.SetValue(stu1,“15”)，这句话给一个int型字段赋了string类型的值，编译是不会报错的，在运行时会抛出一个System.ArgumentException异常，请多加注意.

有了以上的了解，让我们写一个简单的动态字段赋值/取值类Dynamic

具体代码如下:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Reflection;namespace MyUnityHelper{ /// <summary> /// 动态编译类 /// </summary> public class Dynamic { /// <summary> /// 动态赋值 /// </summary> /// <param name="obj"></param> /// <param name="fieldName"></param> /// <param name="value"></param> public static void SetValue(object obj,string fieldName,object value) { FieldInfo info = obj.GetType().GetField(fieldName); info.SetValue(obj, value); } /// <summary> /// 泛型动态赋值 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="obj"></param> /// <param name="fieldName"></param> /// <param name="value"></param> public static void SetValue<T>(object obj, string fieldName, T value) { FieldInfo info = obj.GetType().GetField(fieldName); info.SetValue(obj, value); } /// <summary> /// 动态取值 /// </summary> /// <param name="obj"></param> /// <param name="fieldName"></param> /// <returns></returns> public static object GetValue(object obj, string fieldName) { FieldInfo info = obj.GetType().GetField(fieldName); return info.GetValue(obj); } /// <summary> /// 动态取值泛型 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="obj"></param> /// <param name="fieldName"></param> /// <returns></returns> public static T GetValue<T>(object obj,string fieldName) { FieldInfo info = obj.GetType().GetField(fieldName); return (T)info.GetValue(obj); } }}

补充：C#利用反射方法实现对象的字段和属性之间值传递

在面向对象开发过程中，往往会遇到两个对象之间进行值传递的情况，如果对象中的属性和字段较多，手动一一赋值效率实在太低。

这里就整理了一个通用的对象之间进行值传递的方法，并且考虑到对象中可能包含类属性，因此还用到了递归以解决这个问题。

下面上代码：

public static void ConvertObject(object SrcClass, object DesClass, bool convertProperty = true, bool convertField = true, bool showError = true) { try { if (SrcClass == null) { return; } if (convertProperty) { PropertyInfo[] srcProperties = SrcClass.GetType().GetProperties(); PropertyInfo[] desProperties = DesClass.GetType().GetProperties(); if (srcProperties.Length > 0 && desProperties.Length > 0) { foreach (var srcPi in srcProperties) { foreach (var desPi in desProperties) { if (srcPi.Name == desPi.Name && srcPi.PropertyType == desPi.PropertyType && desPi.CanWrite) { if (srcPi.PropertyType.IsClass) { ConvertObject(srcPi.GetValue(SrcClass, null), desPi.GetValue(DesClass, null), convertProperty, convertField, showError); } else { Object value = srcPi.GetValue(SrcClass, null); desPi.SetValue(DesClass, value, null); } } } } } } if (convertField) { FieldInfo[] srcFields = SrcClass.GetType().GetFields(); FieldInfo[] desFields = DesClass.GetType().GetFields(); if (srcFields.Length > 0 && desFields.Length > 0) { foreach (var srcField in srcFields) { foreach (var desField in desFields) { if (srcField.Name == desField.Name && srcField.FieldType == desField.FieldType) { if (srcField.FieldType.IsClass) { ConvertObject(srcField.GetValue(SrcClass), desField.GetValue(DesClass), convertProperty, convertField, showError); } else { Object value = srcField.GetValue(SrcClass); desField.SetValue(DesClass, value); } } } } } } } catch (Exception ex) { if (showError) { MessageBox.Show($"Convert Error: Method={nameof(ConvertObject)}, Message={ex.Message}"); } else { throw new Exception($"Convert Error: Method={nameof(ConvertObject)}, Message={ex.Message}"); } } }

以上为个人经验，希望能给大家一个参考，也希望大家多多支持。如有错误或未考虑完全的地方，望不吝赐教。