.net 反射访问私有变量和私有方法

Posted 2020-06-17

以下为本次实践代码：

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Linq;
 5 using System.Reflection;
 6 using System.Text;
 7 using System.Threading.Tasks;
 8 
 9 namespace ConsoleTest
10 {
11     class Program
12     {
13         static void Main(string[] args)
14         {
15             //反射读取类私有属性
16             Person per = new Person("ismallboy", "20102100104");
17             Type t = per.GetType();
18             //获取私有方法
19             MethodInfo method = t.GetMethod("GetStuInfo", BindingFlags.NonPublic | BindingFlags.Instance);
20             //访问无参数私有方法
21             string strTest = method.Invoke(per, null).ToString();
22             //访问有参数私有方法
23             MethodInfo method2 = t.GetMethod("GetValue", BindingFlags.NonPublic | BindingFlags.Instance);
24             object[] par = new object[2];
25             par[0] = "ismallboy";
26             par[1] = 2;
27             string strTest2 = method2.Invoke(per, par).ToString();
28 
29             //获取私有字段
30             PropertyInfo field = t.GetProperty("Name", BindingFlags.NonPublic | BindingFlags.Instance);
31             //访问私有字段值
32             string value = field.GetValue(per).ToString();
33             //设置私有字段值
34             field.SetValue(per, "new Name");
35             value = field.GetValue(per).ToString();
36         }
37     }
38 
39     /// <summary>
40     /// 个人信息
41     /// </summary>
42     class Person
43     {
44         private string Name { get; set; }
45         private string StuNo { get; set; }
46 
47         public Person(string name, string stuNo)
48         {
49             this.Name = name;
50             this.StuNo = stuNo;
51         }
52 
53         private string GetStuInfo()
54         {
55             return this.Name;
56         }
57 
58         private string GetValue(string str, int n)
59         {
60             return str + n.ToString();
61         }
62     }
63 }

如果使用dynamic的话，也可以如下：

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Linq;
 5 using System.Reflection;
 6 using System.Text;
 7 using System.Threading.Tasks;
 8 
 9 namespace ConsoleTest
10 {
11     class Program
12     {
13         static void Main(string[] args)
14         {
15             //反射读取类私有属性
16             dynamic per = new Person("ismallboy", "20102100104");
17             Type t = per.GetType();
18             //获取私有方法
19             MethodInfo method = t.GetMethod("GetStuInfo", BindingFlags.NonPublic | BindingFlags.Instance);
20             //访问无参数私有方法
21             string strTest = method.Invoke(per, null);
22             //访问有参数私有方法
23             MethodInfo method2 = t.GetMethod("GetValue", BindingFlags.NonPublic | BindingFlags.Instance);
24             object[] par = new object[2];
25             par[0] = "ismallboy";
26             par[1] = 2;
27             string strTest2 = method2.Invoke(per, par);
28 
29             //获取私有字段
30             PropertyInfo field = t.GetProperty("Name", BindingFlags.NonPublic | BindingFlags.Instance);
31             //访问私有字段值
32             string value = field.GetValue(per);
33             //设置私有字段值
34             field.SetValue(per, "new Name");
35             value = field.GetValue(per);
36         }
37     }
38 
39     /// <summary>
40     /// 个人信息
41     /// </summary>
42     class Person
43     {
44         private string Name { get; set; }
45         private string StuNo { get; set; }
46 
47         public Person(string name, string stuNo)
48         {
49             this.Name = name;
50             this.StuNo = stuNo;
51         }
52 
53         private string GetStuInfo()
54         {
55             return this.Name;
56         }
57 
58         private string GetValue(string str, int n)
59         {
60             return str + n.ToString();
61         }
62     }
63 }