C#用反射机制调用dll文件的字段、属性和方法

1、创建dll文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CLStudent
{
    public class Student
    {
        //字段
        public string Name = "Tom";
        //属性
        public double ChineseScore { get; set; } = 80;
        public double MathScore { get; set; } = 90;
        //方法
        public double TotalScore(double cScore,double mScore)
        {
            double score = cScore + mScore;
            return score;
        }
    }
}

2、调用dll

using System.Reflection;

namespace ReflectionApp
{
    
    internal class Program
    {
        static void Main(string[] args)
        {
            //方法一：用指定的名称加载程序集
            //1、添加程序集的引用
            //2、加载程序集
            //Assembly assembly = Assembly.Load("CLStudent, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null");
            //Assembly assembly = Assembly.Load("CLStudent");
            //方法二：用指定的路径加载程序集
            Assembly assembly = Assembly.LoadFile("F:\\Winform\\ReflectionApp\\CLStudent\\bin\\Debug\\CLStudent.dll");
            //Assembly assembly = Assembly.LoadFrom("F:\\Winform\\ReflectionApp\\CLStudent\\bin\\Debug\\CLStudent.dll");
            //方法三：用指定的文件名加载程序集
            //1、添加程序集的引用
            //2、加载程序集
            //Assembly assembly = Assembly.LoadFrom("CLStudent.dll");

            Type type = assembly.GetType("CLStudent.Student");
            object StudentInstance = Activator.CreateInstance(type);


            FieldInfo fieldInfo = type.GetField("Name");
            string fieldValue = (string)fieldInfo.GetValue(StudentInstance);
            Console.WriteLine($"Student Name 字段值为{fieldValue}");

            PropertyInfo propertyInfo = type.GetProperty("ChineseScore");
            double propertyValue = (double)propertyInfo.GetValue(StudentInstance);
            Console.WriteLine($"Student {fieldValue} ChineseScore值为{propertyValue}");

            propertyInfo = type.GetProperty("MathScore");
            propertyValue = (double)propertyInfo.GetValue(StudentInstance);
            Console.WriteLine($"Student {fieldValue} MathScore值为{propertyValue}");

            MethodInfo methodInfo = type.GetMethod("TotalScore");
            object output = methodInfo.Invoke(StudentInstance, new object[] { 100,90 });
            Console.WriteLine($"Student TotalScore 方法返回值为{output}");
            Console.ReadKey();
        }
    }
}