添加Lesson21

2025-11-05 10:39:06 +08:00
parent ed22d4bcbd
commit 7ca83872f3
6 changed files with 262 additions and 0 deletions
@@ -0,0 +1,43 @@
+using System.Reflection;
+
+namespace Lesson21_特性练习
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Assembly assembly = Assembly.LoadFrom(@"D:\VisualStudio2022\VisualStudio Programe\C#\C#进阶\反射练习库\bin\Debug\反射练习库");
+            Type[] types = assembly.GetTypes();
+            for (int i = 0; i < types.Length; i++)
+            {
+                Console.WriteLine(types[i]);
+            }
+            //得type
+            Type playertype = assembly.GetType("反射练习库.Player");
+            //实例化对象
+            object playerObj = Activator.CreateInstance(playertype);
+            Console.WriteLine(playerObj);
+
+            FieldInfo[] fields = playertype.GetFields();
+            for (int i = 0; i < fields.Length; i++)
+            {
+                Console.WriteLine(fields[i]);
+            }
+
+            //首先得到自定义特性的Type
+            Type atrribute = assembly.GetType("反射练习库.MyCustomAttribute");
+
+            //赋值名字
+            FieldInfo fieldStr = playertype.GetField("name");
+            if(fieldStr.GetCustomAttribute(atrribute) != null)
+            {
+                Console.WriteLine("非法操作，随意修改name成员");
+            }
+            else
+            {
+                //检测是否被自定义特性修饰 如果是 就不能更改 而是提示
+                fieldStr.SetValue(playerObj, "123123");
+            }
+        }
+    }
+}