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非新文，由自己以前在baidu网站转来的。（现在百度的博客不喜欢，转来这存档。很久以前的工作笔记了）
因为工作需要要将大致300多条数据提交到网站，而网站在提交 错数据后无法正常进入相应的数据页面进行修改，
不得己自己动手开发一个。
关键字：httpwebrequest, httpwebrespone, excel ,datagradview,httpwatch.cookie
首先下载一个httpwatch安装，在IE中截获提交信息
登录流：
POST /index.php/Public/checkLogin/ HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, */*
Referer: http://syd.fjedu.gov.cn/index.php/Public/login
Accept-Language: zh-cn
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)
Host: syd.fjedu.gov.cn
Content-Length: 101
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: PHPSESSID=22g4terki0cnj498q17duhim46
account=账号名的URL编码(具体要编码后才知道)&password=XXXXXXXX&verify=8251
红色因保密需要而修改。
提交流：
POST /index.php/Sydmd/update/navTabId/index HTTP/1.1
x-requested-with: XMLHttpRequest
Accept-Language: zh-cn
Referer: http://syd.fjedu.gov.cn/index.php/Index/index#index
Accept: application/json, text/javascript, */*; q=0.01
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)
Host: syd.fjedu.gov.cn
Content-Length: 270
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: PHPSESSID=22g4terki0cnj498q17duhim46; _currentUrl_=czoyMjoiL2luZGV4LnBocC9TeWRtZC9pbmRleCI7
id=数据ID&name＝姓名sex＝性别&sfzid=身份证&minzhu＝民族cityid=58&xianid=573&jhr_name=%E6%9E%97%E6%9C%88%E5%89%8D&jhr_tel=13799492115&address=%E5%BE%B7%E5%8C%96%E5%8E%BF%E6%9D%A8%E6%A2%85&knlx=2&ndkje=6000.00&mdremark=
红色部分保密，也为输入的参数。id为己提交数据时产生的ID，要在网站复制下来才可以得到。
二、登录
1cookie取得。为了取得cookie先get主页面
此代码在form1中执行，即程序运行即自动获取。
HttpWebRequest req;
WebResponse wrp;
Cookies = new CookieContainer();
// Cookies.SetCookies("http://syd.fjedu.gov.cn/index.php/Public/login", "PHPSESSID=22g4terki0cnj498q17duhim46");
InitializeComponent();
req = WebRequest.Create(Index_URL) as HttpWebRequest;
//req.Method = "GET";
req.ProtocolVersion = HttpVersion.Version11;
// req.Headers.Add("1.1");
req.ContentType = "application/x-www-form-urlencoded";
req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)";
//req.CookieContainer=Cookies ;
//在这里对接收到的页面内容进行处理
try
{
HttpWebResponse hwrs = (HttpWebResponse)req.GetResponse();
StreamReader reader = new StreamReader(hwrs.GetResponseStream());
String message = reader.ReadToEnd();
RTB.Text = message;
strCookie = hwrs.GetResponseHeader("Set-Cookie");//这里的strcookie是字符，不是C#中的Cookie类型，所以后面的使用以真正的cookie类型不同
req.Abort();
}
catch (Exception ex)
{
}
finally
{
if (req != null)
req.Abort();
}
2.获取验证码图片并显示。
private void pictureBox1_Click(object sender, EventArgs e)
{
HttpWebResponse wresponse;
Stream s;
HttpWebRequest req;
req = (HttpWebRequest)HttpWebRequest.Create(Image_URL);
req.Headers.Add("Accept-Language", "zh-cn");
req.Headers.Add("Cookie", strCookie);//加入cookie才有效，没有cookie则取得的无效。。
wresponse = (HttpWebResponse)req.GetResponse();
try
{
s = wresponse.GetResponseStream();
System.Drawing.Image simg = System.Drawing.Image.FromStream(s);
Bitmap newimg = new Bitmap(simg);
pictureBox1.Image = simg;
//Cookies = req.CookieContainer;
//wresponse.Close;
}
catch (Exception ex)
{
}
finally
{
if (req != null)
req.Abort();
}
//pictureBox1.Load("http://syd.fjedu.gov.cn/index.php/Public/verify/");这个代码无cookie无效，所以不用。虽可显示。
}
3.登录代码：
private void button1_Click(object sender, EventArgs e)
{
//登录
//HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("");
HttpWebRequest req1;
string postData =String.Format("account={0}&password={1}&verify={2}",textBox1.Text , textBox2.Text, textBox3.Text);
req1 = WebRequest.Create(LOGIN_URL) as HttpWebRequest;
try
{
//StreamWriter requestWriter1 = new StreamWriter(req1.GetRequestStream());
req1.Method = "POST";
req1.ContentType = "application/x-www-form-urlencoded";
req1.ProtocolVersion = HttpVersion.Version11;
req1.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.1.4322)";
//Cookie: PHPSESSID=22g4terki0cnj498q17duhim46
req1.Headers.Add("Accept-Language", "zh-cn");
req1.Headers.Add("Accept-Encoding", "gzip, deflate");
//req.Connection = Keep - Alive;
req1.KeepAlive = true;
//req.RequestUri = "/index.php/Public/checkLogin/";
req1.Headers.Add("Cookie", strCookie);//加入cookie才有效，没有cookie则取得的无效。。
Encoding encoding = Encoding.GetEncoding("utf-8");
//UrlEncode(postData, encoding);
byte[] bytesToPost = encoding.GetBytes(postData);
req1.ContentLength = bytesToPost.Length;
System.IO.Stream requestStream = req1.GetRequestStream();
requestStream.Write(bytesToPost, 0, bytesToPost.Length);
requestStream.Close();
HttpWebResponse hwrs1 = (HttpWebResponse)req1.GetResponse();
StreamReader reader1 = new StreamReader(hwrs1.GetResponseStream());
String message1 = reader1.ReadToEnd();
RTB.Text = message1;
//requestWriter.Close();成功....
}
catch (WebException ex)
{
throw ex;
}
finally
{
if (req1 != null)
req1.Abort();
}
}
4.读取excel并填 充datagridview.
须引用：using System.Data.OleDb;
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:/data.xls;" +
"Extended Properties=‘Excel 8.0;HDR=Yes;IMEX=1‘";
DataSet ds = new DataSet();
OleDbDataAdapter oada = new OleDbDataAdapter("select * from [index$]", strConn);
oada.Fill(ds);
try
{
dataGridView1.DataSource = ds.Tables[0];//读取第一个表格，以excel表的顺序为准。具体可以自己试。
}
catch (Exception ex)
{
throw ex;
}
5.批量提交：
string Sid, sName,ssex,ssfzid,sminzhu,scityid,sxianid,sjhr_name,sjhr_tel,saddress,sknlx ;//提交顺序处理表格，并定义。
//HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("");
HttpWebRequest req2;
//sName,ssex,ssfzid,sminzhu,scityid,sxianid,sjhr_name,sjhr_tel,saddress,sknlx
string postData = "";
int i = 0,j=0;
for (j = 0; j < 302; j++)
{
//sName = dataGridView1[i, j].Value.ToString(); i++;
req2 = WebRequest.Create(Post_URL) as HttpWebRequest;//httpwebrequest赋值后不能修改，所以放在循环中生成
try
{
//StreamWriter requestWriter1 = new StreamWriter(req1.GetRequestStream());
req2.Method = "POST";
req2.ContentType = "application/x-www-form-urlencoded";
req2.ProtocolVersion = HttpVersion.Version11;
req2.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.1.4322)";
//Cookie: PHPSESSID=22g4terki0cnj498q17duhim46
req2.Headers.Add("Accept-Language", "zh-cn");
req2.Headers.Add("Accept-Encoding", "gzip, deflate");
//req.Connection = Keep - Alive;
req2.KeepAlive = true;
//req.RequestUri = "/index.php/Public/checkLogin/";
req2.Headers.Add("Cookie", strCookie);
//id Sname Xb sfzid jhr_name jhr_tel address knlx minzhu cityid xianid
i = 0;
Sid = dataGridView1[i, j].Value.ToString(); i++;
sName = dataGridView1[i, j].Value.ToString(); i++;
ssex = dataGridView1[i, j].Value.ToString(); i++;
ssfzid = dataGridView1[i, j].Value.ToString(); i++;
sjhr_name = dataGridView1[i, j].Value.ToString(); i++;
sjhr_tel = dataGridView1[i, j].Value.ToString(); i++;
saddress = dataGridView1[i, j].Value.ToString(); i++;
sknlx = dataGridView1[i, j].Value.ToString(); i++;
sminzhu = dataGridView1[i, j].Value.ToString(); i++;
scityid = dataGridView1[i, j].Value.ToString(); i++;
sxianid = dataGridView1[i, j].Value.ToString();
postData = String.Format("id={0}&name={1}&sex={2}&sfzid={3}&minzhu={4}&cityid={5}&xianid={6}&jhr_name={7}&jhr_tel={8}&address={9}&knlx={10}&ndkje=6000.00&mdremark=", Sid, sName, ssex, ssfzid, sminzhu, scityid, sxianid, sjhr_name, sjhr_tel, saddress, sknlx);//中间的&号不要掉了，会出错，却记
Encoding encoding = Encoding.GetEncoding("utf-8");
byte[] bytesToPost = encoding.GetBytes(postData);
req2.ContentLength = bytesToPost.Length;
System.IO.Stream requestStream = req2.GetRequestStream();
requestStream.Write(bytesToPost, 0, bytesToPost.Length);
HttpWebResponse hwrs2 = (HttpWebResponse)req2.GetResponse();
StreamReader reader2 = new StreamReader(hwrs2.GetResponseStream());
String message2 = reader2.ReadToEnd();
RTB.Text = message2;//下面最好有结果判断。。。
requestStream.Close();
// progressBar1.Increment(1);
progressBar1.Value = j;
//requestWriter.Close();鎴愬姛....
}
catch (WebException ex)
{
throw ex;
}
finally
{
if (req2 != null)
req2.Abort();//关闭httpwebrequest以便再生成。。。。
}
}//j循环结束
}
三小结。
此程序历时一天半才完成，期间遇到问题有：
1.httpwebrequest的使用问题，不可重复使用真让人郁闷。。
2.excel导入到datagridview
3..httpwebrequest使用cookie也是很大的问题。。。
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原文地址：http://www.cnblogs.com/CatDo/p/4502875.html
