C# 向服務器上傳文件（客服端winform、服務端web）

首先寫客服端，winform模擬一個post提交：

/// <summary> 
        /// 將本地文件上傳到指定的服務器(HttpWebRequest方法) 
        /// </summary> 
        /// <param name="address">文件上傳到的服務器</param> 
        /// <param name="fileNamePath">要上傳的本地文件（全路徑）</param> 
        /// <param name="saveName">文件上傳後的名稱</param> 
        /// <param name="progressBar">上傳進度條</param> 
        /// <returns>成功返回1，失敗返回0</returns> 
        private int Upload_Request2(string address, string fileNamePath, string saveName, ProgressBar progressBar)
        {
            int returnValue = 0;     // 要上傳的文件 
            FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
            BinaryReader r = new BinaryReader(fs);     //時間戳 
            string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");
            byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "\r\n");     //請求頭部信息 
            StringBuilder sb = new StringBuilder();
            sb.Append("--");
            sb.Append(strBoundary);
            sb.Append("\r\n");
            sb.Append("Content-Disposition: form-data; name=\"");
            sb.Append("file");
            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);     // 根據uri創建HttpWebRequest對象 
            HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address));
            httpReq.Method = "POST";     //對發送的數據不使用緩存 
            httpReq.AllowWriteStreamBuffering = false;     //設置獲得響應的超時時間（300秒） 
            httpReq.Timeout = 300000;
            httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary;
            long length = fs.Length + postHeaderBytes.Length + boundaryBytes.Length;
            long fileLength = fs.Length;
            httpReq.ContentLength = length;
            try
            {
                progressBar.Maximum = int.MaxValue;
                progressBar.Minimum = 0;
                progressBar.Value = 0;
                //每次上傳4k
                int bufferLength = 4096;
                byte[] buffer = new byte[bufferLength]; //已上傳的字節數 
                long offset = 0;         //開始上傳時間 
                DateTime startTime = DateTime.Now;
                int size = r.Read(buffer, 0, bufferLength);
                Stream postStream = httpReq.GetRequestStream();         //發送請求頭部消息 
                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;
                    lblTime.Text = "已用時：" + second.ToString("F2") + "秒";
                    if (second > 0.001)
                    {
                        lblSpeed.Text = "平均速度：" + (offset / 1024 / second).ToString("0.00") + "KB/秒";
                    }
                    else
                    {
                        lblSpeed.Text = " 正在連接…";
                    }
                    lblState.Text = "已上傳：" + (offset * 100.0 / length).ToString("F2") + "%";
                    lblSize.Text = (offset / 1048576.0).ToString("F2") + "M/" + (fileLength / 1048576.0).ToString("F2") + "M";
                    Application.DoEvents();
                    size = r.Read(buffer, 0, bufferLength);
                }
                //添加尾部的時間戳 
                postStream.Write(boundaryBytes, 0, boundaryBytes.Length);
                postStream.Close();         //獲取服務器端的響應 
                WebResponse webRespon = httpReq.GetResponse();
                Stream s = webRespon.GetResponseStream();
                //讀取服務器端返回的消息
                StreamReader sr = new StreamReader(s);          
                String sReturnString = sr.ReadLine();
                s.Close();
                sr.Close();
                if (sReturnString == "Success")
                {
                    returnValue = 1;
                }
                else if (sReturnString == "Error")
                {
                    returnValue = 0;
                }
            }
            catch
            {
                returnValue = 0;
            }
            finally
            {
                fs.Close();
                r.Close();
            } return returnValue;
        }

參數說明如下：

address：接收文件的URL地址，如：http://localhost/UploadFile/Save.aspx

fileNamePath：要上傳的本地文件，如：D:\test.rar

saveName：文件上傳到服務器後的名稱，如：200901011234.rar

progressBar：顯示文件上傳進度的進度條。

接收文件的WebForm添加一個Save.aspx頁面，Load方法如下：

protected void Page_Load(object sender, EventArgs e)
    {
        if (Request.Files.Count > 0)
        {
            try
            {
                HttpPostedFile file = Request.Files[0];
                //string filePath = "C:\\Documents and Settings\\Administrator\\桌面\\2\\" + file.FileName;//this.MapPath("UploadDocument")
                string filePath = "D:\\SourceSafe\\testupform\\" + file.FileName;
                file.SaveAs(filePath);
                Response.Write("Success");
            }
            catch
            {
                Response.Write("Error");
            }
        }
        else
        {
            Response.Write("Error1");
        }

    }

同時需要配置WebConfig文件的httpRuntime 如下：

<httpRuntime maxRequestLength="102400" executionTimeout="300"/>

不能的話最大隻能上傳4M了。要是想上傳更大的文件，maxRequestLength，executionTimeout設置大些，同時WinForm下的代碼行

//設置獲得響應的超時時間（300秒）
httpReq.Timeout = 300000;

也要修改，另外別忘了看看IIS的連接超時是否設置爲足夠大。

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