httpwebrequest上传图片问题[100分]

xmsheji 2009-10-03 08:29:57

 <form action="http://192.168.1.104:8088/schedule/Upload" method="post" enctype="multipart/form-data"

name="upload">

   <input type="file" name="file" id="file">

   <input type="submit">

</form>

谁能给一段Httpwebrequest上传图片的例子，主要是怎么对文件进行处理和编码，这个不太清楚，（文字已经可以上传了），模拟上面这个表单。

成功马上给分啊！

http://topic.csdn.net/u/20090930/15/23a11827-e9bd-46bb-ba17-8c6ed2aac10c.html
另外这个帖子发错了类别，加上这50分，共100分啊。

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maole413149 2010-05-10

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孟子E章 2009-10-04

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C#代码

    private void button1_Click(object sender, EventArgs e)

    {

      String fileToUpload = "E:\\bjxml20071016004.jpg";

      String uploadUrl = "http://localhost/ask/UploadFile.aspx";

      String fileFormName = "file";

      String contenttype = "image/jpeg";

      string boundary = "----------" + DateTime.Now.Ticks.ToString("x");





      HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(uploadUrl);

      webrequest.ContentType = "multipart/form-data; boundary=" + boundary;

      webrequest.Method = "POST";

      StringBuilder sb = new StringBuilder();

      sb.Append("--");

      sb.Append(boundary);

      sb.Append("\r\n");

      sb.Append("Content-Disposition: form-data; name=\"");

      sb.Append(fileFormName);

      sb.Append("\"; filename=\"");

      sb.Append(Path.GetFileName(fileToUpload));

      sb.Append("\"");

      sb.Append("\r\n");

      sb.Append("Content-Type: ");

      sb.Append(contenttype);

      sb.Append("\r\n");

      sb.Append("\r\n");



      string postHeader = sb.ToString();

      byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);

      byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");

      FileStream fileStream = new FileStream(fileToUpload,FileMode.Open, FileAccess.Read);

      long length = postHeaderBytes.Length + fileStream.Length +  boundaryBytes.Length;

      webrequest.ContentLength = length;

      Stream requestStream = webrequest.GetRequestStream();

      requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);



      byte[] buffer = new Byte[(int)fileStream.Length];

      int bytesRead = 0;

      while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)

        requestStream.Write(buffer, 0, bytesRead);

      requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);

      requestStream.Close();

    }

接收端的代码：

<%@ Page Language="C#" %>



<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">



<script runat="server">



  protected void Page_Load(object sender, EventArgs e)

  {

    HttpFileCollection files = HttpContext.Current.Request.Files;

    for (int iFile = 0; iFile < files.Count; iFile++)

    {

      HttpPostedFile postedFile = files[iFile];

      string fileName;

      fileName = System.IO.Path.GetFileName(postedFile.FileName);

      if (fileName != "")

      {

        postedFile.SaveAs(System.Web.HttpContext.Current.Request.MapPath("~/") + fileName);

      }

    }



  }

</script>



<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

  <title></title>

</head>

<body>

  <form id="form1" method="post" enctype="multipart/form-data">

  <input type="file" name="file" id="file" />

  <input type="submit" />

  </form>

</body>

</html>

zming 2009-10-04

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客户端页面：



 <form action="http://192.168.1.104:8088/schedule/Upload" method="post" enctype="multipart/form-data"

name="upload">

   <input type="file" name="file" id="file">

   <input type="submit">

</form>

服务器ASP.NET代码：



protected void Page_Load(object sender, EventArgs e)

{

    HttpFileCollection httpFiles = Request.Files;

    for (int i = 0; i < httpFiles.Count; i++)

    {

        string filename = httpFiles[i].FileName;  // 上传文件名称

        int filesize = httpFiles[i].ContentLength;  // 上传文件大小

        string mimetype = httpFiles[i].ContentType; // 上传文件的MIME类型, 二进制数据应该为"application/octet-stream"



        byte[] filedata = new byte[filesize];

        httpFiles[i].InputStream.Read(filedata, 0, filesize);



        // 上传文件的数据都读到 filedata 中了，要存储到何处，楼主自己写代码吧

    }

}