一个主要的窗体程序

一个主要的窗体措施，两个输入框，一个label

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using ProOperation;
using ProFactory;

namespace ProOperation
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

private void Form1_Load(object sender, EventArgs e)
        {
            //首先读取配置文件
            string[] lines = File.ReadAllLines("Config.txt", Encoding.Default);
            int x = 139;
            int y = 154;
            foreach (string  item in lines)
            {
                //有几条数据，就创建几个按钮
                Button btn = new Button();
                btn.Location = new Point(x,y);
                btn.Size = new Size(75, 23);
                x += 80;
                btn.Text = item;

                btn.Click += new EventHandler(btn_Click);
                this.Controls.Add(btn);//添加到窗体上
            }
        }

void btn_Click(object sender, EventArgs e)
        {
            Button btn = sender as Button;
            int n1 = Convert.ToInt32(textBox1.Text.Trim());
            int n2 = Convert.ToInt32(textBox2.Text.Trim());
            //获得简单工厂供给的父类东西
            Operation oper = Factory.GetOper(btn.Text, n1, n2);
            if (oper != null)
            {
                label1.Text = oper.GetResult().ToString();
            }
            else
            {
                MessageBox.Show("并没有此运算符");
            }
        }
    }
}

四个类库孕育产生dll

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ProOperation;

namespace ProAdd
{
    public class Add : Operation
    {
        //默认是挪用的是无参结构。如果有参的话，就要这样挪用，将参数，传给父类
        public Add(int n1, int n2) : base(n1, n2){}

public override string Type
        {
            get { return "+"; }
        }

public override int GetResult()
        {
            return this.NumberOne + NumberTwo;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ProOperation;
using System.Reflection;
using System.IO;