C# HTTP上传多个文件及传递参数

1、HTTP上传文件及传递参数

    #region 6.0 上传多个文件和参数

    /// <summary>

    /// HttpUploadFile

    /// </summary>

    /// <param name="url"></param>

    /// <param name="files"></param>

    /// <param name="data"></param>

    /// <param name="encoding"></param>

    /// <returns></returns>

    public static string HttpUploadFile(string url, string[] files, Dictionary<string,string> data, Encoding encoding)

    {

        //必须

        string boundary = DateTime.Now.Ticks.ToString("X");

        //必须的

        //form 开始标志

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

        //form 结尾标志

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

        //1.HttpWebRequest

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

        request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;

        request.Method = "POST";

        request.KeepAlive = true;

        request.Credentials = CredentialCache.DefaultCredentials;

        using (Stream stream = request.GetRequestStream())

        {

            //传递参数模板 Content-Disposition:form-data;name=\"{0}\"\r\n\r\n{1}

            //1.1 key/value

            string formdataTemplate = "Content-Disposition:form-data;name=\"{0}\"\r\n\r\n{1}";

            //传递参数

            if (data != null)

            {

                foreach (string key in data.Keys)

                {

                    //传递参数开始标识

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

                    string formitem = string.Format(formdataTemplate, key, data[key]);

                    byte[] formitembytes = encoding.GetBytes(formitem);

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

                }

            }

            //上传文件模板

            //1.2 file

            string headerTemplate = "Content-Disposition:form-data;name=\"{0}\";filename=\"{1}\"\r\nContent-Type:application/octet-stream\r\n\r\n";

            byte[] buffer = new byte[**];

            for (int i = ; i < files.Length; i++)

            {

                //上传文件标识

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

                string header = string.Format(headerTemplate, "file" + i, Path.GetFileName(files[i]));

                byte[] headerbytes = encoding.GetBytes(header);

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

                //将文件流读入到请求流中

                using (FileStream fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read))

                {

                    int r = fileStream.Read(buffer,,buffer.Length);

                    stream.Write(buffer, , r);

                }

            }

            //form 结束标志

            //1.3 form end

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

        }

        //2.WebResponse

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

        using (StreamReader stream = new StreamReader(response.GetResponseStream()))

        {

            string result = stream.ReadToEnd();

            return result;

        }

    }

    #endregion

2、测试：

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.Collections.Generic;

using System.Text;

public partial class httpUpload_Index : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void Button1_Click(object sender, EventArgs e)

    {

        string url = "http://172.16.1.110:8888/httpUpload/Index.aspx";string pFilename1 = FileUpload1.PostedFile.FileName;

        string pFilename2 = FileUpload2.PostedFile.FileName;

        string pFilename3 = FileUpload3.PostedFile.FileName;

        string[] files = new string[] { pFilename1, pFilename2, pFilename3 };

        //string[] files = new string[1] { pFilename1};

        Dictionary<string, string> data = new Dictionary<string, string>();

        data.Add("loginName", "测试");

        data.Add("password", "");

        string result = HttpUploadDemo.HttpUploadFile(url, files,data,Encoding.UTF8);

        Response.Write(result);

    }

}

3、HTML页面

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Index.aspx.cs" Inherits="httpUpload_Index" %>

<!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 runat="server">

    <title>无标题页</title>

</head>

<body>

    <form id="form1" runat="server">

    <div>

        <asp:FileUpload ID="FileUpload1" runat="server" /> <br /><br />

        <asp:FileUpload ID="FileUpload2" runat="server" /> <br /><br />

        <asp:FileUpload ID="FileUpload3" runat="server" /> <br /><br />

        <asp:Button ID="Button1" runat="server"

            Text="上传文件" onclick="Button1_Click" />

    </div>

    </form>

</body>

</html>

4、服务器端

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.IO;

namespace WebThreadTest.httpUpload

{

    public partial class Index : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            string password = this.Request["password"];

            string loginName = this.Request["loginName"];

            HttpFileCollection files = Request.Files;

            if (files.Count<=)

            {

                Response.Write("error");

                return;

            }

            for (int i = ; i < files.Count; i++)

            {

                HttpPostedFile file = files.Get(i);

                string filename = file.FileName;

                string extension = Path.GetExtension(filename);

                string uploadFilename = DateTime.Now.ToFileTime() + extension;

                string uploadDic = Server.MapPath(@"~/resource/httpUpload/");

                if (!Directory.Exists(uploadDic))

                {

                    Directory.CreateDirectory(uploadDic);

                }

                file.SaveAs(uploadDic + uploadFilename);

            }

            Response.Write("success");

        }

    }

}