c# Winform上传文件

http://blog.csdn.net/shihuan10430049/article/details/3734398这个代码有点问题

http://blogs.msdn.com/b/johan/archive/2006/11/15/are-you-getting-outofmemoryexceptions-when-uploading-large-files.aspx

http://blog.csdn.net/five3/article/details/7181521

Winform代码:

public static void UploadFile(string strFilePath, string strSavePath, string strURL)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strURL);

            string strBoundry = "------------" + System.DateTime.Now.Ticks.ToString("x");
            // The trailing boundary string
            byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundry + "\r\n");
            StringBuilder sb = new StringBuilder();
            sb.Append("--");
            sb.Append(strBoundry);
            sb.Append("\r\n");
            sb.Append("Content-Disposition: form-data; name=\"");
            sb.Append("A.txt");
            sb.Append("\"; filename=\"");
            sb.Append(Path.GetFileName(strFilePath));
            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);

            // The WebRequest
            HttpWebRequest oWebrequest = (HttpWebRequest)WebRequest.Create(strURL);
            oWebrequest.ContentType = "multipart/form-data; boundary=" + strBoundry;
            oWebrequest.Method = "POST";

            // This is important, otherwise the whole file will be read to memory anyway...
            oWebrequest.AllowWriteStreamBuffering = false;

            // Get a FileStream and set the final properties of the WebRequest
            FileStream oFileStream = new FileStream(strFilePath, FileMode.Open, FileAccess.Read);
            long length = postHeaderBytes.Length + oFileStream.Length + boundaryBytes.Length;
            oWebrequest.ContentLength = length;
            Stream oRequestStream = oWebrequest.GetRequestStream();

            // Write the post header
            oRequestStream.Write(postHeaderBytes, , postHeaderBytes.Length);

            // Stream the file contents in small pieces (4096 bytes, max).
            byte[] buffer = new Byte[checked((uint)Math.Min(, (int)oFileStream.Length))];
            int bytesRead = ;
            while ((bytesRead = oFileStream.Read(buffer, , buffer.Length)) != )
                oRequestStream.Write(buffer, , bytesRead);
            oFileStream.Close();

            // Add the trailing boundary
            oRequestStream.Write(boundaryBytes, , boundaryBytes.Length);
            WebResponse oWResponse = oWebrequest.GetResponse();
            Stream s = oWResponse.GetResponseStream();
            StreamReader sr = new StreamReader(s);
            String sReturnString = sr.ReadToEnd();

            // Clean up
            oFileStream.Close();
            oRequestStream.Close();
            s.Close();
            sr.Close();

            //return sReturnString;

        }

aspx代码

public partial class Save : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (Request.Files.Count > 0)
            {
                try
                {
                    HttpPostedFile file = Request.Files[0];
                    string filePath = this.MapPath("UploadDocument") + "\\" + file.FileName;
                    if (!Directory.Exists(Path.GetDirectoryName(filePath)))
                    {
                        Directory.CreateDirectory(Path.GetDirectoryName(filePath));
                    }
                    file.SaveAs(filePath);
                    Response.Write("Success/r/n");
                }
                catch(Exception ex)
                {
                    Response.Write("Error/r/n");
                }
            }
        }
    }

　　亲测可用