不会报错，就是会卡住，进度不变，只有一个是变的，
以开始是用CookieContainer ，后来改用在header里加入cookie也不行，如果不加cookie，就没有问题，加不同的cookie也没有问题，顺便贴上代码：
private static string Upload_Request(string address, Stream fs, string saveName, UpdateGridMethod updateGrid, DataGridViewRow row,string cookie) {
// 要上传的文件
//FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
System.Net.ServicePointManager.DefaultConnectionLimit = 50;
BinaryReader r = new BinaryReader(fs, Encoding.UTF8);
string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");//时间戳
byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "--\r\n");
StringBuilder sb = new StringBuilder();//请求头部信息
sb.Append("--");
sb.Append(strBoundary);
sb.Append("\r\n");
sb.Append("Content-Disposition: form-data; name=\"");
sb.Append("xmldata");
sb.Append("\"; filename=\"");
sb.Append(saveName);
sb.Append("\"");
sb.Append("\r\n");
sb.Append("Content-Type: ");
sb.Append("application/octet-stream");
sb.Append("\r\n");
sb.Append("\r\n");
string strPostHeader = sb.ToString();
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader);
// 根据uri创建HttpWebRequest对象
System.GC.Collect();
HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(Url + address));
//----优化参数
httpReq.ServicePoint.Expect100Continue = false;
httpReq.ServicePoint.UseNagleAlgorithm = false;
httpReq.ServicePoint.ConnectionLimit = 50;
httpReq.AllowWriteStreamBuffering = false; httpReq.Proxy = null;
httpReq.Method = "POST";
if (cookie != null)
httpReq.Headers.Add("Cookie", cookie);//设置cookies
else
httpReq.Headers.Add("Cookie", cookiePublic);//设置cookies
//httpReq.CookieContainer = CookieContainer;
httpReq.AllowWriteStreamBuffering = false;//对发送的数据不使用缓存
httpReq.Timeout = 60000;//设置获得响应的超时时间（600秒）
httpReq.KeepAlive = false;
httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary;
long length = fs.Length + postHeaderBytes.Length + boundaryBytes.Length;
long fileLength = fs.Length;
httpReq.ContentLength = length;
Stream postStream = null;
WebResponse webRespon = null;
string returnMsg = null;
try {
updateGrid(row, null, "正在准备开始上传", null, null);
//每次上传4k
int bufferLength = 4096;
byte[] buffer = new byte[bufferLength];
//已上传的字节数
long offset = 0;
//开始上传时间
DateTime startTime = DateTime.Now;
int size = r.Read(buffer, 0, bufferLength);
postStream = httpReq.GetRequestStream();
//发送请求头部消息
postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
while (size > 0) {
postStream.Write(buffer, 0, size);
offset += size;
//progressBar.Value = (int)(offset * (int.MaxValue / length));
TimeSpan span = DateTime.Now - startTime;
double second = span.TotalSeconds;
if (second > 0.001) {
string info = (offset * 100.0 / length).ToString("F2") + "% " + (offset / 1048576.0).ToString("F2") + "M/" + (fileLength / 1048576.0).ToString("F2") + "M 平均速度：" + (offset / 1024 / second).ToString("0.00") + "KB/秒";
updateGrid(row, null, info, null, null);//lblState.Text = "已上传：" + (offset / 1048576.0).ToString("F2") + "M/" + (fileLength / 1048576.0).ToString("F2") + "M(" + (offset * 100.0 / length).ToString("F2") + "%) 平均速度：" + (offset / 1024 / second).ToString("0.00") + "KB/秒";
} else {
updateGrid(row, null, "正在连接…", null, null);//lblState.Text = " 正在连接…";
}
size = r.Read(buffer, 0, bufferLength);
}
updateGrid(row, null, "已上传完成", null, null);//lblState.Text = "已上传完成";
//添加尾部的时间戳
postStream.Write(boundaryBytes, 0, boundaryBytes.Length);
postStream.Close();
//获取服务器端的响应
webRespon = httpReq.GetResponse();
Stream s = webRespon.GetResponseStream();
StreamReader sr = new StreamReader(s, Encoding.UTF8);
//读取服务器端返回的消息
string sReturnString = sr.ReadToEnd().Trim();
s.Close();
sr.Close();
returnMsg= sReturnString;
} catch (Exception e) {
returnMsg= "1" + e.Message;
} finally {
try {
fs.Close();
r.Close();
if (postStream != null) postStream.Close();
if (webRespon != null) {
webRespon.Close();
webRespon = null;
}
httpReq = null;
} catch (Exception e) { returnMsg= e.Message; }
}
return returnMsg;
}
