利用HttpWebRequest模拟提交图片

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最近在做排量post工具，以前做的都是提交文字这次需要post图片过去，弄了半天终于弄好了；

/// <summary>
/// Post发送图片数据
/// </summary>
public Queusresult requestData(string uri, string imgUrl, List<dataModes> ListMode, Encoding en, CookieContainer cook)
{
HttpWebRequest req = WebRequest.Create(uri) as HttpWebRequest;
req.Method = "POST";
req.ContentType = "application/octet-stream";
//一些不需要的请求头如果去掉不影响久尽量去掉
// req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
req.CookieContainer = cook;
req.AllowAutoRedirect = true;

//可能post了其他参数需要跟图片拼接，我这里没有所以注释了
//StringBuilder postData = new StringBuilder("");
//foreach (dataModes m in ListMode)
//{
// postData.AppendFormat("{0}={1}&", m.keys, m.values);
//}
//postData.AppendFormat("{0}={1}", "1", "1");
//Byte[] writData = ASCIIEncoding.ASCII.GetBytes(postData.ToString()); //读取图片
FileStream oStream = new FileStream(imgUrl, FileMode.Open, FileAccess.Read);
BinaryReader oReader = new BinaryReader(oStream);
Byte[] imgData = oReader.ReadBytes(Convert.ToInt32(oStream.Length)); //byte[] data3 = new byte[writData.Length + imgData.Length];
//System.Array.Copy(writData, 0, data3, 0, writData.Length);
//System.Array.Copy(imgData, 0, data3, writData.Length, imgData.Length); req.ContentLength = imgData.Length;
Stream stream = req.GetRequestStream();
stream.Write(imgData, 0, imgData.Length);
stream.Close(); HttpWebResponse response = req.GetResponse() as HttpWebResponse;
Stream str = response.GetResponseStream();
string html = "";
using (StreamReader strRead = new StreamReader(str, en))
{
req.CookieContainer.Add(response.Cookies);
html = strRead.ReadToEnd();
}
Queusresult q = new Queusresult();
q.html = html;
q.cookie = cook;
return q;