C#实现HttpPost提交文件

先建立一个WebApplication

Web.config

<?xml version="1.0" encoding="utf-8"?>

<configuration>

    <system.web>

      <!--<globalization requestEncoding="gb2312" responseEncoding="gb2312" fileEncoding="gb2312"/>-->

      <compilation debug="true" />

      <authentication mode="Windows" />

    </system.web>

</configuration>

Server.ashx

using System;

using System.Data;

using System.Web;

using System.Collections;

using System.Web.Services;

using System.Web.Services.Protocols;

using System.IO;

using System.Text;

namespace WebApplication1

{

    [WebService(Namespace = "http://tempuri.org/")]

    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

    public class Server : IHttpHandler

    {

        public void ProcessRequest(HttpContext context)

        {

            try

            {

                string saveDirectory = @"f:\temp";              

                string user = context.Request.Form["user"].ToString();

                string pass = context.Request.Form["pass"].ToString();

                if (!(user == "abc" && pass == ""))

                {

                    context.Response.Write("验证出错!");

                }

                HttpPostedFile postFile = context.Request.Files["myFile"];

                string postFileName = Path.GetFileName(postFile.FileName);

                byte[] bufferFile = new byte[postFile.ContentLength];

                postFile.InputStream.Read(bufferFile, , postFile.ContentLength);

                string savePath = Path.Combine(saveDirectory, postFileName);

                using (FileStream stream = new FileStream(savePath, FileMode.Create, FileAccess.Write))

                {

                    stream.Write(bufferFile, , bufferFile.Length);

                    stream.Flush();

                    stream.Close();

                }

                context.Response.Write("提交成功!");

            }

            catch (Exception ex)

            {

                context.Response.Write(ex.Message);

            }

        }

        public bool IsReusable

        {

            get

            {

                return false;

            }

        }

    }

}

选建个html测试下

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

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

<head>

    <title>测试提交</title>

</head>

<body>

     <form action="Server.ashx" enctype="multipart/form-data" method="post">

      <input type="text" name="user" value="abc" />

      <input type="text" name="pass" value="123"/>

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

      <input type="submit" />

     </form>

</body>

</html>

再用C#按Http协议提交：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Net;

using System.IO;

namespace WinFormHttpPost

{

    public partial class Form1 : Form

    {

        private Encoding currentEncode = Encoding.GetEncoding("utf-8");

        public Form1()

        {

            InitializeComponent();

        }

        private void Submit(string url, string user, string pass, string filePath)

        {

            string boundary = Guid.NewGuid().ToString();

            string beginBoundary = "--" + boundary;

            string endBoundary = "--" + boundary + "--";

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

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

            request.Method = "POST";

            request.KeepAlive = true;

            StringBuilder sbBody = new StringBuilder();

            sbBody.AppendLine(beginBoundary);

            sbBody.AppendLine("Content-Disposition: form-data; name=\"user\"");

            sbBody.AppendLine();

            sbBody.AppendLine(user);

            sbBody.AppendLine(beginBoundary);

            sbBody.AppendLine("Content-Disposition: form-data; name=\"pass\"");

            sbBody.AppendLine();

            sbBody.AppendLine(pass);

            sbBody.AppendLine(beginBoundary);

            sbBody.AppendLine(string.Format("Content-Disposition: form-data; name=\"myFile\"; filename=\"{0}\"", filePath));

            sbBody.AppendLine("Content-Type: application/octet-stream");

            sbBody.AppendLine();

            byte[] bufferContent = currentEncode.GetBytes(sbBody.ToString());

            byte[] bufferFile = GetFileByte(filePath);

            byte[] bufferEndBoundary = currentEncode.GetBytes("\r\n" + endBoundary);

            byte[] bufferBody = new byte[bufferContent.Length + bufferFile.Length + bufferEndBoundary.Length];

            int startIndex = ;

            bufferContent.CopyTo(bufferBody, startIndex);

            startIndex += bufferContent.Length;

            bufferFile.CopyTo(bufferBody, startIndex);

            startIndex += bufferFile.Length;

            bufferEndBoundary.CopyTo(bufferBody, startIndex);

            request.ContentLength = bufferBody.Length;

            using (Stream requestStream = request.GetRequestStream())

            {

                requestStream.Write(bufferBody, , bufferBody.Length);

            }

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            Stream receiveStream = response.GetResponseStream();

            StreamReader readStream = new StreamReader(receiveStream, currentEncode);

            tbResult.Text = readStream.ReadToEnd();

            response.Close();

            readStream.Close();

        }

        private byte[] GetFileByte(string filePath)

        {

            byte[] bufferFileInfo = null;

            using (FileStream stream = new FileStream(filePath, FileMode.Open, FileAccess.Read))

            {

                bufferFileInfo = new byte[stream.Length];

                stream.Read(bufferFileInfo, , bufferFileInfo.Length);

            }

            return bufferFileInfo;

        }

        private void btnSubmit_Click(object sender, EventArgs e)

        {

            Submit("http://localhost.:3558/Server.ashx", "abc", "", "F:\\报表下载清单2.xls");

        }

    }

}

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