C# --通过反射获取类型的字段值及给字段赋值
转自:
https://blog.csdn.net/qq_40693302/article/details/98961669
以下是转载的,方便自己快速查阅,这篇文章总结的很好,感谢原作者。
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); } } }
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原文链接:https://blog.csdn.net/qq_40693302/article/details/98961669