小男子 从java转c# 遇到问题了````

以前学Java 现在实习用的是c#,遇到问题了,求大家帮忙啊````如果是控制台程序,感觉自己很容易上手
但是图形化界面一直是瓶颈啊,没有突破口````请看以下程序```using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;namespace Demo_082001
{
    class Program
    {
        static void Main(string[] args)
        {
            string s_FileName1 = @"c:\1.txt";
            string s_FileName2 = @"c:\2.txt";
            string s_FileName3 = @"c:\3.txt";            using (StreamReader sr1 = new StreamReader(s_FileName1))
            {
                using (StreamReader sr2 = new StreamReader(s_FileName2))
                {
                    using (StreamWriter sw3 = new StreamWriter(s_FileName3))
                    {
                        while (sr1.Peek() >= 0 && sr2.Peek() >= 0)
                        {
                            string str1 = sr1.ReadLine();  //读取数据
                            string str2 = sr2.ReadLine();                            string[] a = str1.Split(',');   //拆分数据
                            string[] b = str2.Split('/');                            int temp = a.Length ;     
                            string f = "";
                                                       for (int i = 0; i < temp-1; i++) 
                            {
                                if (a[i].Equals(b[i]))
                                {
                                    f = f + a[i];
                                }                                else 
                                {
                                    int q;
                                    Console.WriteLine("********************************");
                                    //Console.WriteLine("These" + "[" + (i+1) + "]" + "rows are wrong...");
                                    //Console.WriteLine(a[i]+" "+b[i]);
                                    Console.WriteLine(str1);
                                    Console.WriteLine(str2);
                                    Console.WriteLine(f);
                                                                        Console.WriteLine("PLEASE ENTER YOUR CHOOSE,1,化为一    ,2,化为二");
                                    q = int.Parse(Console.ReadLine());                                    if (q ==1) 
                                    {
                                        f = f + a[i];
                                        Console.WriteLine(f);
                                        continue;
                                       
                                    }                                    else if(q ==2)
                                    {
                                        f=f+b[i];
                                        Console.WriteLine(f);
                                        continue;
                                    }
                                }
                            }
                            Console.WriteLine(f);
                        }
                    }
                }
            }
        }
    }
}
我想换成图形化界面``` 如下:
string s_FileName1 = "";
        string s_FileName2 = "";
        string s_FileName3 = "";
        int changer_no = 0;        private void OpenFile1_Click(object sender, EventArgs e)//选择文件一并打开
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                s_FileName1 = openFileDialog1.FileName;
                pathtextBox1.Text = openFileDialog1.FileName;
            }
        }        private void OpenFile2_Click(object sender, EventArgs e)//选择文件二并打开
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                s_FileName2 = openFileDialog1.FileName;
                pathtextBox2.Text = openFileDialog1.FileName;
            }
        }        private void SaveFile3_Click(object sender, EventArgs e)//选择保存位置
        {
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                s_FileName3 = saveFileDialog1.FileName;
                pathtextBox3.Text = saveFileDialog1.FileName;
            }
        }        public string  Change(int c,string f,string e1,string e2) 
        {
            if (c == 1) 
            {
                f = f + e1;
            }            if (c == 2) 
            {
                f = f + e2;
            }
            return f;
        }        private void Search_Click(object sender, EventArgs e)//检查过程
        {
            using (StreamReader sr1 = new StreamReader(s_FileName1))
            {
                using (StreamReader sr2 = new StreamReader(s_FileName2))
                {
                    using (StreamWriter sw3 = new StreamWriter(s_FileName3))
                    {
                        while (sr1.Peek() >= 0 && sr2.Peek() >= 0)
                        {
                            string str1 = sr1.ReadLine();//从文件一中读取一行数据...
                            string str2 = sr2.ReadLine();//从文件二中读取一行数据...                            string[] a = str1.Split(',');   //拆分数据
                            string[] b = str2.Split('/');                            int temp = a.Length;    
                            
                            string f = "";                 //建立新字符串
                            
                            for (int i = 0; i < temp - 1; i++)
                            {
                                if (a[i].Equals(b[i]))
                                {
                                    f = f + a[i];
                                }                                else
                                {
                                    textBox1.Text = str1 ;
                                    textBox2.Text = str2 ;
                                    textBox3.Text = f ;                                    Change(changer_no, f, a[i], b[i]);
                                    continue;
                                }
                            }
                            sw3.WriteLine(f); 
                        }
                    }                                                                      
                }
            }
        }             private void Changebutton1_Click(object sender, EventArgs e)//进行改变处理,同而为一
        {
            changer_no = 1;
        }        private void Changebutton2_Click(object sender, EventArgs e)//进行改变处理,同而为二
        {
            changer_no = 2;
        }可是 我不会在 Search_click事件中 触发下面的时间啊````
怎么才能改变现在状态啊````