WinForm使用webclient通过http的POST方式上传文件

default2.aspx

1 <%@ page language="C#" autoeventwireup="true" inherits="Default2, App_Web_wnfnivuw" %>
2
3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
4
5 <html xmlns="http://www.w3.org/1999/xhtml" >
6 <head runat="server">
7     <title>无标题页</title>
8 </head>
9 <body>
10     <form id="form1" runat="server" enctype="multipart/form-data">
11     <div>
12             Specify the file to upload:
13         <asp:PlaceHolder id="Place" runat="server">
14             <input id="File1" type="file" runat="Server"/>
15         </asp:PlaceHolder>
16         <p>
17         Save as file name (no path):
18         <input id="Text1"
19         type="text"
20         runat="server" />
21
22         <p>
23         <span id="Span1"
24         style="font: 8pt verdana;"
25         runat="server" />
26
27         <p>
28         <input type=button
29         id="Button1"
30         value="Upload"
31         runat="server" onserverclick="Button1_ServerClick" />
32     </div>
33     </form>
34 </body>
35 </html>
36

default2.aspx.cs

1 protected void Page_Load(object sender, EventArgs e)
2     {
3         //把request 请求的数据dump 到一个文件中
4         if (Page.IsPostBack)
5         {
6             byte[] b = Request.BinaryRead(Request.ContentLength);
7
8             FileStream fs = new System.IO.FileStream(@"D:\Log.txt", System.IO.FileMode.Create);             BinaryWriter sw = new System.IO.BinaryWriter(fs);
9             sw.Write(b);
10             sw.Close();
11             fs.Close();
12         }
13
14
15     }

default2.aspx.cs

protected void Button1_ServerClick(object sender, EventArgs e)
    {
        // Get the HtmlInputFile control from the Controls collection
        // of the PlaceHolder control.
        HtmlInputFile file = (HtmlInputFile)Page.FindControl("File1");

        // Make sure a file was submitted.

        if (Text1.Value == "")
        {
            Span1.InnerHtml = "Error: you must enter a file name";
            return;
        }

        // Save file to server.
        if (file.PostedFile != null)
        {
            try
            {
                file.PostedFile.SaveAs("D:\\" + Text1.Value);
                Span1.InnerHtml = "File uploaded successfully to " + "<b>D:\\" + Text1.Value + "</b> on the Web server";
            }
            catch (Exception exc)
            {
                Span1.InnerHtml = "Error saving file <b>D:\\" + Text1.Value + "</b><br>" + exc.ToString();
            }
        }
    }

form2.cs

  1         private void btnUpload_Click(object sender, System.EventArgs e)
  2         {
  3             // 非空检验
  4             if (txtAmigoToken.Text.Trim() == "" || txtFilename.Text == "" || txtFileData.Text.Trim() == "")
  5             {
  6                 MessageBox.Show("Please fill data");
  7                 return;
  8             }
  9
10             // 所要上传的文件路径
11             string path = txtFileData.Text.Trim();
12
13             // 检查文件是否存在
14             if (!File.Exists(path))
15             {
16                 MessageBox.Show("{0} does not exist!", path);
17                 return;
18             }
19
20             // 读文件流
21             FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
22             WebClient webClient = new WebClient();
23
24             ///////////////////////////////////////
25             // 打开页面
26             ///////////////////////////////////////
27             byte[] responseData = webClient.DownloadData(txtAmigoToken.Text);
28             string srcString = Encoding.UTF8.GetString(responseData);
29
30             ///////////////////////////////////////
31             // 填写页面并提交
32             ///////////////////////////////////////
33
34             // 获取页面的 VeiwState
35             string viewStateFlag = "id=\"__VIEWSTATE\" value=\"";
36             int i = srcString.IndexOf(viewStateFlag) + viewStateFlag.Length;
37             int j = srcString.IndexOf("\"", i);
38             string viewState = srcString.Substring(i, j - i);
39
40             // 获取页面的 EventValidation
41             string eventValidationFlag = "id=\"__EVENTVALIDATION\" value=\"";
42             i = srcString.IndexOf(eventValidationFlag) + eventValidationFlag.Length;
43             j = srcString.IndexOf("\"", i);
44             string eventValidation = srcString.Substring(i, j - i);
45
46             // 获取页面的 EVENTARGUMENT
47             string eventargumentFlag = "id=\"__EVENTARGUMENT\" value=\"";
48             i = srcString.IndexOf(eventargumentFlag) + eventargumentFlag.Length;
49             j = srcString.IndexOf("\"", i);
50             string eventargument = "";// srcString.Substring(i, j - i);
51
52             // 获取页面的 EVENTTARGET
53             string eventtargetFlag = "id=\"__EVENTTARGET\" value=\"";
54             i = srcString.IndexOf(eventtargetFlag) + eventtargetFlag.Length;
55             j = srcString.IndexOf("\"", i);
56             string eventtarget = "Button1";
57
58             // 这部分需要完善
59             string ContentType = "application/octet-stream";
60             byte[] fileBytes = new byte[fs.Length];
61             fs.Read(fileBytes, 0, Convert.ToInt32(fs.Length));
62
63
64             // 生成需要上传的二进制数组
65             CreateBytes cb = new CreateBytes();
66             // 所有表单数据
67             ArrayList bytesArray = new ArrayList();
68             // 普通表单
69             bytesArray.Add(cb.CreateFieldData("__EVENTTARGET", eventtarget));
70             bytesArray.Add(cb.CreateFieldData("__EVENTARGUMENT", eventargument));
71             bytesArray.Add(cb.CreateFieldData("__VIEWSTATE", viewState));
72             bytesArray.Add(cb.CreateFieldData("__EVENTVALIDATION", eventValidation));
73
74             bytesArray.Add(cb.CreateFieldData("Text1", txtFilename.Text));
75             // 文件表单
76             bytesArray.Add(cb.CreateFieldData("File1", path, ContentType, fileBytes));
77
78             // 合成所有表单并生成二进制数组
79             byte[] bytes = cb.JoinBytes(bytesArray);
80
81             FileStream fs1 = new System.IO.FileStream(@"F:\PostLog.txt", System.IO.FileMode.Append); //把request 请求的数据dump 到一个文件中
82             BinaryWriter sw = new System.IO.BinaryWriter(fs1);
83             sw.Write(bytes);
84             sw.Close();
85             fs1.Close();
86
87             // 返回的内容
88             byte[] responseBytes;
89
90             // 上传到指定Url
91             bool uploaded = cb.UploadData(txtAmigoToken.Text, bytes, out responseBytes);
92
93             // 将返回的内容输出到文件
94             using (FileStream file = new FileStream(@"f:\response.text", FileMode.Create, FileAccess.Write, FileShare.Read))
95             {
96                 file.Write(responseBytes, 0, responseBytes.Length);
97             }
98
99             txtResponse.Text = System.Text.Encoding.UTF8.GetString(responseBytes);
100
101         }
102
103         private void btnBrowse_Click(object sender, System.EventArgs e)
104         {
105             if(openFileDialog1.ShowDialog() == DialogResult.OK)
106             {
107                 txtFileData.Text = openFileDialog1.FileName;
108             }
109
110         }

updata.cs

using System;
using System.Web;
using System.IO;
using System.Net;
using System.Text;
using System.Collections;

namespace UploadData.Common
{
    /**//// <summary>
    /// 创建WebClient.UploadData方法所需二进制数组
    /// </summary>
    public class CreateBytes
    {
        Encoding encoding = Encoding.UTF8;

        /**//// <summary>
        /// 拼接所有的二进制数组为一个数组
        /// </summary>
        /// <param name="byteArrays">数组</param>
        /// <returns></returns>
        /// <remarks>加上结束边界</remarks>
        public byte[] JoinBytes(ArrayList byteArrays)
        {
            int length = 0;
            int readLength = 0;

            // 加上结束边界
            string endBoundary = Boundary + "--\r\n"; //结束边界
            byte[] endBoundaryBytes = encoding.GetBytes(endBoundary);
            byteArrays.Add(endBoundaryBytes);

            foreach(byte[] b in byteArrays)
            {
                length += b.Length;
            }
            byte[] bytes = new byte[length];

            // 遍历复制
            //
            foreach(byte[] b in byteArrays)
            {
                b.CopyTo(bytes, readLength);
                readLength += b.Length;
            }

            return bytes;
        }

        public bool UploadData(string uploadUrl, byte[] bytes, out byte[] responseBytes)
        {
            WebClient webClient = new WebClient();
            webClient.Headers.Add("Content-Type", ContentType);

            try
            {
                responseBytes = webClient.UploadData(uploadUrl, bytes);
                return true;
            }
            catch (WebException ex)
            {
                Stream resp = ex.Response.GetResponseStream();
                responseBytes = new byte[ex.Response.ContentLength];
                resp.Read(responseBytes, 0, responseBytes.Length);
            }
            return false;
        }

        /**//// <summary>
        /// 获取普通表单区域二进制数组
        /// </summary>
        /// <param name="fieldName">表单名</param>
        /// <param name="fieldValue">表单值</param>
        /// <returns></returns>
        /// <remarks>
        /// -----------------------------7d52ee27210a3c\r\nContent-Disposition: form-data; name=\"表单名\"\r\n\r\n表单值\r\n
        /// </remarks>
        public byte[] CreateFieldData(string fieldName, string fieldValue)
        {
            string textTemplate = Boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}\r\n";
            string text = String.Format(textTemplate, fieldName, fieldValue);
            byte[] bytes = encoding.GetBytes(text);
            return bytes;
        }


        /**//// <summary>
        /// 获取文件上传表单区域二进制数组
        /// </summary>
        /// <param name="fieldName">表单名</param>
        /// <param name="filename">文件名</param>
        /// <param name="contentType">文件类型</param>
        /// <param name="contentLength">文件长度</param>
        /// <param name="stream">文件流</param>
        /// <returns>二进制数组</returns>
        public byte[] CreateFieldData(string fieldName, string filename,string contentType, byte[] fileBytes)
        {
            string end = "\r\n";
            string textTemplate = Boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n";

            // 头数据
            string data = String.Format(textTemplate, fieldName, filename, contentType);
            byte[] bytes = encoding.GetBytes(data);



            // 尾数据
            byte[] endBytes = encoding.GetBytes(end);

            // 合成后的数组
            byte[] fieldData = new byte[bytes.Length + fileBytes.Length + endBytes.Length];

            bytes.CopyTo(fieldData, 0); // 头数据
            fileBytes.CopyTo(fieldData, bytes.Length); // 文件的二进制数据
            endBytes.CopyTo(fieldData, bytes.Length + fileBytes.Length); // \r\n

            return fieldData;
        }

        #region 属性
        public string Boundary
        {
            get
            {
                string[] bArray, ctArray;
                string contentType = ContentType;
                ctArray = contentType.Split(';');
                if (ctArray[0].Trim().ToLower() == "multipart/form-data")
                {
                    bArray = ctArray[1].Split('=');
                    return "--" + bArray[1];
                }
                return null;
            }
        }

        public string ContentType
        {
            get {
                if (HttpContext.Current == null)
                {
                    return "multipart/form-data; boundary=---------------------------7d5b915500cee";
                }
                return HttpContext.Current.Request.ContentType;
            }
        }
        #endregion
    }
}

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