dll函式庫原始碼

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace cl1
{
    public class Class1
    {
        private  string Name;
        private int Age;
        public Class1() { Name = "name"; Age = 0
 
; }
        public Class1(string name) { Name = name; Age = 0; }
        public Class1(string name,int age) { Name = name; Age = age; }
        public static void M1()
        {
            MessageBox.Show("靜態無參函式");
        }
        public static void M2(string name)
        {
            MessageBox.Show($
 
"靜態帶參函式String{name}");
        }
        public static void M2(string name, int age)
        {
            MessageBox.Show($"靜態帶參函式int{name+age}");
        }
        public void M3()
        {
            MessageBox.Show($"非靜態無參函式name={Name},age={Age}");
        }
        public void M4(string name)
        {
            MessageBox.Show($
 
"非靜態帶參函式string{name}");
        }
        public void M4(int age)
        {
            MessageBox.Show($"非靜態帶參函式int{age}");
        }
        public void M5(string name) { MessageBox.Show(name); }
    }
}

呼叫嘗試

public static void test()
        {
            Assembly assembly;
            Type type;

            string path = @"G:\Base\SelfBasic\cl1\bin\Debug\cl1.dll";
            assembly = Assembly.LoadFrom(path);
            //獲取程式集例項中具有指定名稱的Type物件
            type = assembly.GetType("cl1.Class1");
            //獲取Class1物件
            var C1 = Activator.CreateInstance(type);//建構函式public Class1() 
            var C2 = Activator.CreateInstance(type, "string");//建構函式public Class1(string name) 
            var C3 = Activator.CreateInstance(type, "string", 123);//建構函式public Class1(string name,int age) 
            //獲取方法
            var m1 = type.GetMethod("M1");//方法名M1在Class1類中沒有過載，獲取明確 方法為私有或不存在時返回null
            var val1 = m1.Invoke(null, null);//執行m1 M1函式為靜態的，且無參，Invoke中引數可為null

            var m2 = type.GetMethod("M2", new Type[] { typeof(string) });//獲取public static void M2(string name)
            var val2 = m2.Invoke(null, new object[] { "str" });//執行m2

            var m3 = type.GetMethod("M2", new Type[] { typeof(string), typeof(int) });//獲取public static void M2(string name, int age)
            var val3 = m3.Invoke(null, new object[] { "str", 124 });//執行m3

            //非靜態函式的獲取及呼叫
            var m4 = type.GetMethod("M3");
            var val4 = m4.Invoke(C1, null);
            val4 = m4.Invoke(C2, null);
            val4 = m4.Invoke(C3, null);

            var m5 = type.GetMethod("M4", new Type[] { typeof(string) });
            var val5 = m5.Invoke(C1, new object[] { "dtr" });
            val5 = m5.Invoke(C2, new object[] { "dtr" });
            val5 = m5.Invoke(C3, new object[] { "dtr" });

            var m6 = type.GetMethod("M4", new Type[] { typeof(int) });
            var val6 = m6.Invoke(C1, new object[] { 225 });
            val6 = m6.Invoke(C2, new object[] { 225 });
            val6 = m6.Invoke(C3, new object[] { 225 });
        }