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C# 向服務器上傳文件（客服端winform、服務端web）

本文轉載自   查看原文   2017-11-01 15:42   4821    web端/ ADO.NET/ WinForm/ C# 基礎

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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">文件上傳后的名稱</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：文件上傳到服務器后的名稱，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"/>
不能的話最大只能上傳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為足夠大。

 
 
 
  1. /// <summary>   
  2.         /// 將本地文件上傳到指定的服務器(HttpWebRequest方法)   
  3.         /// </summary>   
  4.         /// <param name="address">文件上傳到的服務器</param>   
  5.         /// <param name="fileNamePath">要上傳的本地文件（全路徑）</param>   
  6.         /// <param name="saveName">文件上傳后的名稱</param>   
  7.         /// <param name="progressBar">上傳進度條</param>   
  8.         /// <returns>成功返回1，失敗返回0</returns>   
  9.         private int Upload_Request2(string address, string fileNamePath, string saveName, ProgressBar progressBar)  
  10.         {  
  11.             int returnValue = 0;     // 要上傳的文件   
  12.             FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);  
  13.             BinaryReader r = new BinaryReader(fs);     //時間戳   
  14.             string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");  
  15.             byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "\r\n");     //請求頭部信息   
  16.             StringBuilder sb = new StringBuilder();  
  17.             sb.Append("--");  
  18.             sb.Append(strBoundary);  
  19.             sb.Append("\r\n");  
  20.             sb.Append("Content-Disposition: form-data; name=\"");  
  21.             sb.Append("file");  
  22.             sb.Append("\"; filename=\"");  
  23.             sb.Append(saveName);  
  24.             sb.Append("\";");  
  25.             sb.Append("\r\n");  
  26.             sb.Append("Content-Type: ");  
  27.             sb.Append("application/octet-stream");  
  28.             sb.Append("\r\n");  
  29.             sb.Append("\r\n");  
  30.             string strPostHeader = sb.ToString();  
  31.             byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader);     // 根據uri創建HttpWebRequest對象   
  32.             HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address));  
  33.             httpReq.Method = "POST";     //對發送的數據不使用緩存   
  34.             httpReq.AllowWriteStreamBuffering = false;     //設置獲得響應的超時時間（300秒）   
  35.             httpReq.Timeout = 300000;  
  36.             httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary;  
  37.             long length = fs.Length + postHeaderBytes.Length + boundaryBytes.Length;  
  38.             long fileLength = fs.Length;  
  39.             httpReq.ContentLength = length;  
  40.             try  
  41.             {  
  42.                 progressBar.Maximum = int.MaxValue;  
  43.                 progressBar.Minimum = 0;  
  44.                 progressBar.Value = 0;  
  45.                 //每次上傳4k  
  46.                 int bufferLength = 4096;  
  47.                 byte[] buffer = new byte[bufferLength]; //已上傳的字節數   
  48.                 long offset = 0;         //開始上傳時間   
  49.                 DateTime startTime = DateTime.Now;  
  50.                 int size = r.Read(buffer, 0, bufferLength);  
  51.                 Stream postStream = httpReq.GetRequestStream();         //發送請求頭部消息   
  52.                 postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);  
  53.                 while (size > 0)  
  54.                 {  
  55.                     postStream.Write(buffer, 0, size);  
  56.                     offset += size;  
  57.                     progressBar.Value = (int)(offset * (int.MaxValue / length));  
  58.                     TimeSpan span = DateTime.Now - startTime;  
  59.                     double second = span.TotalSeconds;  
  60.                     lblTime.Text = "已用時：" + second.ToString("F2") + "秒";  
  61.                     if (second > 0.001)  
  62.                     {  
  63.                         lblSpeed.Text = "平均速度：" + (offset / 1024 / second).ToString("0.00") + "KB/秒";  
  64.                     }  
  65.                     else  
  66.                     {  
  67.                         lblSpeed.Text = " 正在連接…";  
  68.                     }  
  69.                     lblState.Text = "已上傳：" + (offset * 100.0 / length).ToString("F2") + "%";  
  70.                     lblSize.Text = (offset / 1048576.0).ToString("F2") + "M/" + (fileLength / 1048576.0).ToString("F2") + "M";  
  71.                     Application.DoEvents();  
  72.                     size = r.Read(buffer, 0, bufferLength);  
  73.                 }  
  74.                 //添加尾部的時間戳   
  75.                 postStream.Write(boundaryBytes, 0, boundaryBytes.Length);  
  76.                 postStream.Close();         //獲取服務器端的響應   
  77.                 WebResponse webRespon = httpReq.GetResponse();  
  78.                 Stream s = webRespon.GetResponseStream();  
  79.                 //讀取服務器端返回的消息  
  80.                 StreamReader sr = new StreamReader(s);            
  81.                 String sReturnString = sr.ReadLine();  
  82.                 s.Close();  
  83.                 sr.Close();  
  84.                 if (sReturnString == "Success")  
  85.                 {  
  86.                     returnValue = 1;  
  87.                 }  
  88.                 else if (sReturnString == "Error")  
  89.                 {  
  90.                     returnValue = 0;  
  91.                 }  
  92.             }  
  93.             catch  
  94.             {  
  95.                 returnValue = 0;  
  96.             }  
  97.             finally  
  98.             {  
  99.                 fs.Close();  
  100.                 r.Close();  
  101.             } return returnValue;  
  102.         }  
 


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