C# post表单

2010这个元旦太无聊了，于是找了个奇迹游戏私服耍，在玩的过程中发现总是要登录到网站上去转生加点之类的操作，1次2次还好，100次你就郁闷了，于是自己想写个简单的程序来做。
以下就是代码部分啦：
（需要注意的是WebClient的Cookie部分）
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Collections.Specialized;
using System.Diagnostics;
using System.Text.RegularExpressions;
namespace ZSMU
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
WebClient client = new WebClient();
client.Headers.Add("Accept", "*/*");
client.Headers.Add("Accept-Encoding", "gzip, deflate");
client.Headers.Add("Accept-Language", "zh-cn");
client.Headers.Add("Cache-Control", "no-cache");
client.Headers.Add("Content-Type", "application/x-www-form-urlencoded");//必填项目
//myWebClient.Headers.Add("Connection", "Keep-Alive");
client.Headers.Add("Referer", "http://www53.292mu.com/usezs.asp");
byte[] byteArray = Encoding.Default.GetBytes("mfkuserchr=%C2%BD%C9%CF%B5%C4%D3%E3&mfkusername=admin&mfkpassword=123456");//将提交的数据转化为byte数组
string resposeData = Encoding.Default.GetString(client.UploadData("http://www53.292mu.com/usezs.asp", "post", byteArray));
resposeData=resposeData.Remove(0, resposeData.IndexOf("alert('") + 7);
resposeData=resposeData.Remove(resposeData.IndexOf(")") - 1);
resposeData=resposeData.Replace("\\n", "");
client.Dispose();
MessageBox.Show(resposeData);
}
priv