关于文件上传下载？

Question

哪位朋友有源码吗？谢谢啦，需要网页版的

Answer 1

是WEB还是winform
webclient,ftpwebrequest
web fileupload,还有很多组件

Answer 2

FileInfo Fi = new FileInfo(filePath);
if (Fi.Exists)
{
  FileStream fs = new FileStream(filePath, FileMode.Open);
  byte[] bytes = new byte[(int)fs.Length];
  fs.Read(bytes, 0, bytes.Length);
  fs.Close();
  Response.ContentType = "application/octet-stream";
  Response.AddHeader("Content-Disposition", "attachment; filename=1.excel");
  Response.BinaryWrite(bytes);
  Response.Flush();
  Response.End();
}
string path = Server.MapPath("~/") + "";
Response.AppendHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(obj.Name, System.Text.Encoding.GetEncoding("utf-8")));
Response.ContentType = "application/octet-stream";
Response.WriteFile("" + path + "");
Response.End();
if (fileUpload.HasFile) 
        { 
            string savePath = Server.MapPath("~/upload/"); 
             if(!System.IO.Directory.Exists(savePath)) 
            { 
                System.IO.Directory.CreateDirectory(savePath); 
            } 
            savePath = savePath + "\\" + fileUpload.FileName; 
            fileUpload.SaveAs(savePath); 
        } 

Answer 3

public void UpLoadTheFile()
        {
            try
            {
                HttpPostedFile hpf = UpLoadFile.PostedFile;
                string path = Server.MapPath("~/");
                //判断是不是当月的第一天
                string firstDay = DateTime.Now.Day.ToString();
                string intMonth = DateTime.Now.Month.ToString();
                string intYear = DateTime.Now.Year.ToString();
                if (firstDay == "1")  //如果为当月第一天，创建文件夹
                {
                    System.IO.Directory.CreateDirectory(path + "ExcelDataReportUpFile/" + intYear + intMonth + firstDay);
                }
                else//否则，检测是否存在当月的文件夹，不存在则创建当月的，防止第一次上传文件时，没有文件夹报错.
                {
                    if (!System.IO.Directory.Exists(path + "ExcelDataReportUpFile/" + intYear + intMonth + "1"))
                        System.IO.Directory.CreateDirectory(path + "ExcelDataReportUpFile/" + intYear + intMonth + "1");
                }
                string filename = hpf.FileName; //获得上传文件全路径 
                int place = filename.LastIndexOf(".") + 1; //获得文件扩展名的位置 
                string extname = filename.Substring(place); //获得上传文件的扩展名                 string fileguid = System.Guid.NewGuid().ToString();//生成唯一标识
                //生成文件名$后为文件夹名，以方便下载查找
                string fullname = fileguid + "$" +intYear + intMonth + "1"+ "." + extname;//重新生成文件名 $为识别符号
                string nowPath = intYear + intMonth + "1";                string imgpath = path + "ExcelDataReportUpFile/" + nowPath + "/" + fullname;//上传文件的存放路径                 hpf.SaveAs(imgpath); //文件上传 
                //获取上传文件的信息，以存入数据库
                addFile.CREA_DATE = DateTime.Now;
                addFile.FILE_EXT = extname;
                //附件说明为上传真实文件名
                addFile.FILE_MEMO = filename.Substring(filename.LastIndexOf("\\") + 1);  
                //NAME为唯一文件名
                addFile.FILE_NAME = fullname;
                
            }
            catch(Exception err)
            {
                ErrHandle(err);
            }
        } 

Answer 4

上传   if (!this.Page.IsPostBack)
        {
            string guid = Request.QueryString["GuID"];
            try
            {
                if (Request.Files.Count > 1)
                {
                    int gid = Request.Files.Count - 1;
                    
                        if (Request.Files[0].ContentLength < 1843200000)
                        {
                            string Dir = System.Configuration.ConfigurationManager.AppSettings["TemporyUpload"];
                            string path = Path.Combine(Dir, guid);
                            string fileName = System.IO.Path.GetFileName(Request.Files[gid - 1].FileName);
                            //if (System.IO.Path.GetFileName(Request.Files[1].FileName) != "")
                            //{
                            //    fileName = System.IO.Path.GetFileName(Request.Files[1].FileName);
                            //}
                            if (!Directory.Exists(path))
                            {
                                Directory.CreateDirectory(path);
                            }
                            Request.Files[0].SaveAs(Path.Combine(path, fileName));
                            //Byte a = Request.TotalBytes();                            if (File.Exists(Path.Combine(path, fileName)))
                            {
                                // int gid = Request.Files.Count - 1;
                                string js = @"<Script language='JavaScript'>parent.window.showSuccessText(" + gid + ");  parent.window.deletePrgs(" + gid + ");   </Script>";
                                // this.Page.ClientScript.RegisterStartupScript(this.GetType(), "uploadstate", "window.top.window.stopUpload(1);", true);//如果和页面建立长连接的话使用，可以实现进度条
                                this.Page.Response.Write(js);
                                this.Page.Response.Flush();                                fileName = "";
                            }
                            else
                            {                            }
                        }
                    }
                
            }
            catch (Exception ee)
            {
                string a = ee.Message;
            }
下载   System.IO.FileInfo aFile = new System.IO.FileInfo(filePath);
        if (aFile.Exists)
        {
            context.Response.Clear();
            context.Response.ClearHeaders();
            context.Response.BufferOutput = false;
            context.Response.ContentType = "application/octet-stream";
            context.Response.AppendHeader("Content-disposition", "attachment;filename=" + HttpUtility.UrlEncode(aFile.Name, System.Text.Encoding.UTF8));
            context.Response.AddHeader("Content-Length", aFile.Length.ToString());
            context.Response.WriteFile(filePath);
            context.Response.Flush();
            context.Response.End();
        }

Answer 5

google搜索，首先要确定你的winform还是asp.net？

Answer 6

csdn上的下载资源可是很多的哟，

Answer 7

  #region post方式发送数据   
   /// <summary>   
   /// post方式发送数据   
   /// </summary>   
    /// <param name="url">url</param>               //string url = "http://localhost:1198/AutoTicket_Notify.aspx";   
    /// <param name="postdata">发送的数据</param>   // string postdata = "ticketnoinfo=info&username=name&pwd=word";    
   /// <returns>返回的结果</returns>   //下载用get，上传用post
   public string SendDataByPost(string url, string postdata)   
   {   
       HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);   
  
       request.Method = "POST";   
       request.ContentType = "application/x-www-form-urlencoded";   
       request.ContentLength = postdata.Length;   
  
       Stream requestStream = request.GetRequestStream();   
       StreamWriter streamWriter = new StreamWriter(requestStream, Encoding.GetEncoding("gb2312"));   
       streamWriter.Write(postdata);   
       streamWriter.Close();   
  
       HttpWebResponse response = (HttpWebResponse)request.GetResponse();   
       Stream responseStream = response.GetResponseStream();   
       StreamReader streamReader = new StreamReader(responseStream, Encoding.GetEncoding("gb2312"));   
       string result = streamReader.ReadToEnd();   
       streamReader.Close();   
       responseStream.Close();   
       return result;   
  
   }  
   #endregion  
 
    #region Get方式获取数据   
   /// <summary>   
   /// Get方式获取数据   
   /// </summary>   
   /// <param name="url">url</param>   
   /// <param name="postdata">发送的数据</param>   
   /// <returns>获取到的结果数据</returns>   
   public string GetDataByGet(string url, string postdata)   
   {   
       HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + (postdata == "" ? "" : "?") + postdata);   
          
       request.Method = "GET";   
       request.ContentType = "text/xml;charset=gb2312";   
  
       HttpWebResponse response = (HttpWebResponse)request.GetResponse();   
       Stream responseStream = response.GetResponseStream();   
       StreamReader streamReader = new StreamReader(responseStream, Encoding.GetEncoding("gb2312"));   
       string result = streamReader.ReadToEnd();   
       streamReader.Close();   
       responseStream.Close();   
  
       return result;   
   }  
   #endregion  
    #region 同步通过GET方式发送数据
    /// <summary>
    /// 通过GET方式发送数据
    /// </summary>
    /// <param name="Url">url</param>
    /// <param name="postDataStr">GET数据</param>
    /// <param name="cookie">GET容器</param>
    /// <returns></returns>
    public static string SendDataByGET(string Url, string postDataStr)
    {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr == "" ? "" : "?") + postDataStr);
        request.Method = "GET";
        request.ContentType = "text/html;charset=UTF-8";        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        Stream myResponseStream = response.GetResponseStream();
        StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
        string retString = myStreamReader.ReadToEnd();
        myStreamReader.Close();
        myResponseStream.Close();        return retString;
    }
    #endregion

Answer 8

ASP.NET将文件放在项目中
protected void lbtnDownload_Click(object sender, EventArgs e)
    {
        string strPath = Server.MapPath("你所存放文件路径");
        if (strPath != "")
        {
            FileInfo FInfo = new FileInfo(strPath);     //使用获得的路径实例化FileInfo对象
            if (FInfo.Exists)       //判断附件是否存在
            {
                Response.Clear();           //清空缓冲区
                Response.ClearHeaders();        //清空缓冲区头
                Response.Buffer = false;        //设置Response对象不可以缓冲输出
                Response.ContentType = "application/octet-stream";      //设置输出流的HTTP MIME类型 
                Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FInfo.FullName, System.Text.Encoding.UTF8));  //将HTTP头添加到输出流
                Response.AppendHeader("Content-Length", FInfo.Length.ToString());       //将要下载的附件大小添加到输出流
                Response.WriteFile(FInfo.FullName);         //将指定的附件写入输出流
                Response.Flush();       //向客户发送当前所有缓冲的输出
                Response.End();            }
        }        }

Answer 9

如果想实现真进度条的话，建议使用flash或者activeX，否则就算用的是StreamReader读取到流，在分块存到目录的操作都是做无用功，无非是先将数据读到了服务器的内存中，再从内存中写文件（测已试过）。

Answer 10

网上应该很多，不过不知道lz说的是Web还是WinForm~~

Answer 11

VS上的控件就能实现 你的问题啊  多看看MSDN吧

Answer 12

项目源码 我有几个
你现看看这个不行 我再发给你
http://www.51aspx.com/CV/uploaddown/

Answer 13

 if (System.IO.File.Exists(filePath))
        {
            FileInfo file = new FileInfo(filePath);
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8"); //解决中文乱码
            Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name)); //解决中文文件名乱码    
            Response.AddHeader("Content-length", file.Length.ToString());
            Response.ContentType = "appliction/octet-stream";
            Response.WriteFile(file.FullName);
            Response.End();
            RegisterClientScriptBlock("", "<script>alert('下载成功')</script>");
        }
        else
        {
            RegisterClientScriptBlock("", "<script>alert('文件不存在')</script>");
        }

Answer 14

网页版的肯定是Asp.NET的 啊！！

Answer 15

using System;using System.Collections.Generic;using System.Data;using System.Windows.Forms;using System.Data.SqlClient;using System.IO;namespace SaveImageToSqlServer{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void buttonSaveImageToDataServer_Click(object sender, EventArgs e)        {            if (DialogResult.OK == this.folderBrowserDialog1.ShowDialog())            {                string dirName = this.folderBrowserDialog1.SelectedPath;                DirectoryInfo dir = new DirectoryInfo(dirName);                FileInfo[] fileInfos = dir.GetFiles("*.jpg");                List<string> fileList = new List<string>(100);                foreach (FileInfo fileInfo in fileInfos)                {                    fileList.Add(fileInfo.FullName);                    System.Windows.Forms.Application.DoEvents();                }                #region Save data to Data Server                string strConn =                    @"Server=(local);"                + @"Initial Catalog=test;"                + @"User Id =yujian;"                + @"Password=;"                + @"Integrated Security = true";                try                {                    using (SqlConnection sqlConnection = new SqlConnection(strConn))                    {                        sqlConnection.Open();                        foreach (string file in fileList)                        {                            FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read);                            byte[] byteImage = new byte[fileStream.Length];                            fileStream.Read(byteImage, 0, (int)fileStream.Length);                            string commandText = "Insert into ImageTable(ImagePath, Image)Values(@ImagePath, @Image)";                            SqlCommand sqlCommand = new SqlCommand(commandText, sqlConnection);                            sqlCommand.Parameters.Add("@ImagePath", SqlDbType.Text);                            sqlCommand.Parameters.Add("@Image", SqlDbType.Binary);                            sqlCommand.Parameters["@ImagePath"].Value = file;                            sqlCommand.Parameters["@Image"].Value = byteImage;                            sqlCommand.ExecuteNonQuery();                            System.Windows.Forms.Application.DoEvents();                        }                    }                }                catch (SqlException ex)                {                    MessageBox.Show(ex.ToString());                }                #endregion                MessageBox.Show("Save data OK.");            }        }        private void buttonShowImage_Click(object sender, EventArgs e)        {            string strConn =                @"Server=(local);"            + @"Initial Catalog=test;"            + @"User id=yujian;"            + @"Password=;"            + @"Integrated Security=true;";            try            {                using (SqlConnection sqlConnection = new SqlConnection(strConn))                {                    sqlConnection.Open();                    string commandText = "Select ImagePath, Image from ImageTable";                    SqlDataAdapter adapter = new SqlDataAdapter(commandText, sqlConnection);                    DataTable dt = new DataTable();                    adapter.Fill(dt);                    this.dataGridView1.DataSource = dt;                    sqlConnection.Close();                }            }            catch (SqlException ex)            {                MessageBox.Show(ex.ToString());            }        }    }}

Answer 16

 //文件上传
        private void Form2_Load(object sender, EventArgs e)
        {
            if (DialogResult.OK == this.folderBrowserDialog1.ShowDialog())
            {
                string dirName = this.folderBrowserDialog1.SelectedPath;
                DirectoryInfo dir = new DirectoryInfo(dirName);
                FileInfo[] fileInfos = dir.GetFiles("*.jpg");
                List<string> fileList = new List<string>(100);
                foreach (FileInfo fileInfo in fileInfos)
                {
                    fileList.Add(fileInfo.FullName);
                    System.Windows.Forms.Application.DoEvents();
                }
                string strConn = @"Server=(local);" + @"Initial Catalog=test;" + @"User Id =yujian;" + @"Password=;" + @"Integrated Security = true";
                try
                {
                    using (SqlConnection sqlConnection = new SqlConnection(strConn))
                    {
                        sqlConnection.Open(); foreach (string file in fileList)
                        {
                            FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read);
                            byte[] byteImage = new byte[fileStream.Length];
                            fileStream.Read(byteImage, 0, (int)fileStream.Length);
                            string commandText = "Insert into ImageTable(ImagePath, Image)Values(@ImagePath, @Image)";
                            SqlCommand sqlCommand = new SqlCommand(commandText, sqlConnection);
                            sqlCommand.Parameters.Add("@ImagePath", SqlDbType.Text);
                            sqlCommand.Parameters.Add("@Image", SqlDbType.Binary);
                            sqlCommand.Parameters["@ImagePath"].Value = file;
                            sqlCommand.Parameters["@Image"].Value = byteImage;
                            sqlCommand.ExecuteNonQuery(); System.Windows.Forms.Application.DoEvents();
                        }
                    }
                }
                catch (SqlException ex)
                {
                    MessageBox.Show(ex.ToString());
                }
            }
        }
       // 文件下载
        private void button1_Click(object sender, EventArgs e)
        {
            string strConn = @"Server=(local);" + @"Initial Catalog=test;" + @"User id=yujian;" + @"Password=;" + @"Integrated Security=true;";
            try
            {
                using (SqlConnection sqlConnection = new SqlConnection(strConn))
                {
                    sqlConnection.Open(); string commandText = "Select ImagePath, Image from ImageTable";
                    SqlDataAdapter adapter = new SqlDataAdapter(commandText, sqlConnection);
                    DataTable dt = new DataTable();
                    adapter.Fill(dt);
                    this.dataGridView1.DataSource = dt; sqlConnection.Close();
                }
            }
            catch (SqlException ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

Answer 17

 string nam = myFile.PostedFile.FileName;
                //取得文件名(包括路径)里最后一个"."的索引
                int i = nam.LastIndexOf(".");                //取得文件扩展名
                string newext = nam.Substring(i);
                
                //这里自动根据日期和文件大小不同为文件命名，确保文件名不重复。
                //DateTime now = DateTime.Now;
                //string newname = now.DayOfYear.ToString() + myFile.PostedFile.ContentLength.ToString();                //保存文件到你所要的目录,这里是IIS根目录下的upfiles目录.你可以改变.
                //注意: 我这里用Server.MapPath()取当前文件的绝对目录.在asp.net里"\"必须用"\\"代替                myFile.PostedFile.SaveAs(Server.MapPath("~\\UploadFiles\\file\\" + TextBox1.Text.Trim() + newext));
下载
直接搞个链接就行了web.config中加入
 <system.web>
      <httpRuntime executionTimeout="90" maxRequestLength="100000" useFullyQualifiedRedirectUrl="false" />
    </system.web>  
红色表示上传的文件大小   

Answer 18

下载
 string path = Server.MapPath("~/Upload/" + file.FilePath);
            if (System.IO.File.Exists(path))
            {
                System.IO.FileStream fs = null;
                try
                {                    fs = new System.IO.FileStream(path, System.IO.FileMode.Open);
                    byte[] buffer = new byte[(int)fs.Length];
                    fs.Read(buffer, 0, buffer.Length);
                    Response.ContentType = "application/octet-stream";
                    //通知浏览器下载文件而不是打开
                    Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode
                        (file.FilePath, System.Text.Encoding.UTF8));
                    Response.BinaryWrite(buffer);
                    Response.Flush();
                    Response.End();
                }
                finally
                {
                    if (fs != null)
                    {
                        fs.Close();
                    }
                }
            }上传 if (File.Exists(Server.MapPath("~/Upload/" + FileUpload1.FileName)))
                {
                    MessageBox.Show(this, "该文件已经存在");
                }
                else
                {
                    try
                    {
                        DayLogInfo log = new DayLogInfo();
                        if (FileUpload1.HasFile)
                        {
                            log.FilePath = FileUpload1.FileName;
                            HttpPostedFile pf = FileUpload1.PostedFile;
                            pf.SaveAs(Server.MapPath("~/Upload/" + FileUpload1.FileName));
                           
                        }
                  }
}
}

Answer 19

http://blog.csdn.net/a13623127108/archive/2010/07/21/5753290.aspx 
 winform的 看看吧或许有用