想问一下，这怎么改啊
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
namespace 实验1
{
public partial class Form1 : Form
{
//定义random的上下限初始值，防止空指针异常随便写一个数，maxVAlue在后面会重新复制
int minValue = 0;
int maxValue = 54;
Random r = new Random();
//定义文件路径
static string path = "Form1.txt";
//读取文件的行数
private int line_num()
{
string[] lines = File.ReadAllLines(path);
int i = lines.Length;
return i;
}
//随机时钟
private void timer1_Tick(object sender, EventArgs e)
{
//设置随机数的上下限，标准规定的取值是，左闭右开
string[] content = File.ReadAllLines(path);
maxValue = line_num();
int i = r.Next(minValue, maxValue);
label1.Text = content[i];
timer1.Start();
}
public Form1()
{
InitializeComponent();
}
private void tabPage1_Click(object sender, EventArgs e)
{
}
private void textBox1_Click(object sender, EventArgs e)
{
}
//添加幸运儿按钮
private void button1_Click(object sender, EventArgs e)
{
//在文件末尾追加一行
FileStream fs = new FileStream(path, FileMode.Append);
StreamWriter sw = new StreamWriter(fs);
//开始写入
sw.WriteLine(textBox1.Text);
//清空缓冲区
sw.Flush();
//关闭流
sw.Close();
fs.Close();
label2.Text = "当前人数：" + line_num().ToString();
}
//抽奖开始结束按钮
private void button2_Click(object sender, EventArgs e)
{
if (button2.Text == "开始")
{
button2.Text = "结束";
timer1.Start();
}
else
{
button2.Text = "开始";
timer1.Stop();
}
}
private void Form1_Load(object sender, EventArgs e)
{
label2.Text = "当前人数：" + line_num().ToString();
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
}
}
