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  • C# 向服务器上传文件（客服端winform、服务端web）

    转载

    首先写客服端，winform模拟一个post提交：

    /// <summary>   
        /// 将本地文件上传到指定的服务器(HttpWebRequest方法)   
        /// </summary>   
        /// <param name="address">文件上传到的服务器</param>   
        /// <param name="fileNamePath">要上传的本地文件（全路径）</param>   
        /// <param name="saveName">文件上传后的名称</param>   
        /// <param name="progressBar">上传进度条</param>   
        /// <returns>成功返回1，失败返回0</returns>   
        private int Upload_Request2(string address, string fileNamePath, string saveName, ProgressBar progressBar)  
        {  
            int returnValue = 0;     // 要上传的文件   
            FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);  
            BinaryReader r = new BinaryReader(fs);     //时间戳   
            string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");  
            byte[] boundaryBytes = Encoding.ASCII.GetBytes("
--" + strBoundary + "
");     //请求头部信息   
            StringBuilder sb = new StringBuilder();  
            sb.Append("--");  
            sb.Append(strBoundary);  
            sb.Append("
");  
            sb.Append("Content-Disposition: form-data; name="");  
            sb.Append("file");  
            sb.Append(""; filename="");  
            sb.Append(saveName);  
            sb.Append("";");  
            sb.Append("
");  
            sb.Append("Content-Type: ");  
            sb.Append("application/octet-stream");  
            sb.Append("
");  
            sb.Append("
");  
            string strPostHeader = sb.ToString();  
            byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader);     // 根据uri创建HttpWebRequest对象   
            HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address));  
            httpReq.Method = "POST";     //对发送的数据不使用缓存   
            httpReq.AllowWriteStreamBuffering = false;     //设置获得响应的超时时间（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);  
                Stream 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;  
                    lblTime.Text = "已用时：" + 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 = " 正在连接…";  
                    }  
                    lblState.Text = "已上传：" + (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);  
                }  
                //添加尾部的时间戳   
                postStream.Write(boundaryBytes, 0, boundaryBytes.Length);  
                postStream.Close();         //获取服务器端的响应   
                WebResponse webRespon = httpReq.GetResponse();  
                Stream s = webRespon.GetResponseStream();  
                //读取服务器端返回的消息  
                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;  
        }
    参数说明如下：
    address：接收文件的URL地址，如：http://localhost/UploadFile/Save.aspx
    fileNamePath：要上传的本地文件，如：D: est.rar
    saveName：文件上传到服务器后的名称，如：200901011234.rar
    progressBar：显示文件上传进度的进度条。
    接收文件的WebForm添加一个Save.aspx页面，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");  
        }  
  
    }
    同时需要配置WebConfig文件的httpRuntime 如下：
    <httpRuntime maxRequestLength="102400" executionTimeout="300"/>
    不能的话最大只能上传4M了。要是想上传更大的文件，maxRequestLength，executionTimeout设置大些，同时WinForm下的代码行
    //设置获得响应的超时时间（300秒）
    httpReq.Timeout = 300000;

    也要修改，另外别忘了看看IIS的连接超时是否设置为足够大。

     
     
     
    1. /// <summary>   
    2.         /// 将本地文件上传到指定的服务器(HttpWebRequest方法)   
    3.         /// </summary>   
    4.         /// <param name="address">文件上传到的服务器</param>   
    5.         /// <param name="fileNamePath">要上传的本地文件（全路径）</param>   
    6.         /// <param name="saveName">文件上传后的名称</param>   
    7.         /// <param name="progressBar">上传进度条</param>   
    8.         /// <returns>成功返回1，失败返回0</returns>   
    9.         private int Upload_Request2(string address, string fileNamePath, string saveName, ProgressBar progressBar)  
    10.         {  
    11.             int returnValue = 0;     // 要上传的文件   
    12.             FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);  
    13.             BinaryReader r = new BinaryReader(fs);     //时间戳   
    14.             string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");  
    15.             byte[] boundaryBytes = Encoding.ASCII.GetBytes(" --" + strBoundary + " ");     //请求头部信息   
    16.             StringBuilder sb = new StringBuilder();  
    17.             sb.Append("--");  
    18.             sb.Append(strBoundary);  
    19.             sb.Append(" ");  
    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(" ");  
    26.             sb.Append("Content-Type: ");  
    27.             sb.Append("application/octet-stream");  
    28.             sb.Append(" ");  
    29.             sb.Append(" ");  
    30.             string strPostHeader = sb.ToString();  
    31.             byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader);     // 根据uri创建HttpWebRequest对象   
    32.             HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address));  
    33.             httpReq.Method = "POST";     //对发送的数据不使用缓存   
    34.             httpReq.AllowWriteStreamBuffering = false;     //设置获得响应的超时时间（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.                 //每次上传4k  
    46.                 int bufferLength = 4096;  
    47.                 byte[] buffer = new byte[bufferLength]; //已上传的字节数   
    48.                 long offset = 0;         //开始上传时间   
    49.                 DateTime startTime = DateTime.Now;  
    50.                 int size = r.Read(buffer, 0, bufferLength);  
    51.                 Stream postStream = httpReq.GetRequestStream();         //发送请求头部消息   
    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 = "已用时：" + 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 = " 正在连接…";  
    68.                     }  
    69.                     lblState.Text = "已上传：" + (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.                 //添加尾部的时间戳   
    75.                 postStream.Write(boundaryBytes, 0, boundaryBytes.Length);  
    76.                 postStream.Close();         //获取服务器端的响应   
    77.                 WebResponse webRespon = httpReq.GetResponse();  
    78.                 Stream s = webRespon.GetResponseStream();  
    79.                 //读取服务器端返回的消息  
    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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  • 原文地址：https://www.cnblogs.com/zhangwei99com/p/7766819.html
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