[实战]MVC5+EF6+MySql企业网盘实战(12)——新建文件夹和上传文件

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Linq.Expressions;
using System.Web;
using System.Web.Mvc;
using System.Web.Script.Serialization;
using Wolfy.NetDisk.BLL;
using Wolfy.NetDisk.IBLL;
using Wolfy.NetDisk.Model;
using Wolfy.NetDisk.Utilities;

namespace Wolfy.NetDisk.Site.Controllers
{
    public class HomeController : Controller
    {
        private IUserInfoServiceRepository _userInfoServiceRepository = new UserInfoServiceRepository();
        private IMyFileServiceRepository _myFileServiceRepository = new MyFileServiceRepository();
        [HttpGet]
        public ActionResult FileList()
        {
            UserInfo userInfo = Session["user"] as UserInfo;
            if (userInfo == null)
            {
                return RedirectToAction("Login", "UserInfo");
            }
            string folderPath = Request.Params["path"];
            Expression<Func<MyFile, bool>> where = null;
            if (string.IsNullOrEmpty(folderPath))
            {

                where = x => x.User.Id == userInfo.Id && x.FolderPath == "/NetDisk/" + userInfo.UserName + "/";
            }
            else
            {
                //保证路径格式一直以/结束
                folderPath = folderPath.TrimEnd('/') + "/";
                where = x => x.User.Id == userInfo.Id && !x.IsDelete && x.FolderPath == folderPath;
            }
            var fileList = _myFileServiceRepository.FindAll(where).OrderBy(x => x.IsFolder).OrderByDescending(x => x.CreateDt);
            ViewBag.UserInfo = userInfo;
            ViewBag.ChildTitle = "我的网盘";
            return View(fileList);
        }

        [HttpPost]
        public void UploadFile(string filePath)
        {
            UserInfo userInfo = Session["user"] as UserInfo;         
            if (userInfo == null)
            {
                RedirectToAction("Login", "UserInfo");
            }
            var files = Request.Files;
            if (files.Count > 0)
            {
                var file = files[0];
                string fileName = file.FileName;
                Stream inputStream = file.InputStream;
                string fileSaveFolder = string.Empty;
                if (!string.IsNullOrEmpty(filePath))
                {
                    filePath = Server.UrlDecode(filePath);
                    fileSaveFolder = Server.MapPath("~/" + filePath);

                }
                else
                {
                    fileSaveFolder = Request.MapPath("~/NetDisk/" + userInfo.UserName);
                }

                //如果目标不存在，则创建
                if (!Directory.Exists(fileSaveFolder))
                {
                    Directory.CreateDirectory(fileSaveFolder);

                }
                byte[] buffer = new byte[inputStream.Length];
                //判断是否已经超出个人网盘大小
                var myFiles = _myFileServiceRepository.FindAll(x => x.User.Id == userInfo.Id);
                int myDiskSize = 0;
                if (myFiles.Count() > 0)
                {
                    myDiskSize = myFiles.Sum(x => x.FileSize);
                }
                //如果已经超出网盘大小，则给出提示
                if (myDiskSize + buffer.Length > userInfo.NetDiskSize)
                {
                    AlertMsg("对不起，您的网盘空间不足，请清理后再次上传，或联系管理员进行扩容。", "");
                    return;
                }
                inputStream.Read(buffer, 0, buffer.Length);
                string strFileMd5 = MD5Helper.GetMD5FromFile(buffer);
                string fileSavePath = Path.Combine(fileSaveFolder, filePath);
                fileSavePath = Path.Combine(fileSaveFolder, fileName);
                //如果文件已经存在
                if (System.IO.File.Exists(fileSavePath))
                {
                    //对文件进行重命名
                    fileName = ReNameHelper.FileReName(fileSavePath);
                    fileSavePath = Path.Combine(fileSaveFolder, fileName);
                }
                file.SaveAs(fileSavePath);
                var currentUser = _userInfoServiceRepository.Find(x => x.Id == userInfo.Id);
                MyFile myFile = new MyFile()
                {
                    FileMd5 = strFileMd5,
                    ModifyDt = DateTime.Now,
                    IsDelete = false,
                    FileSize = buffer.Length,
                    FolderPath = filePath,
                    FileExt = Path.GetExtension(fileSavePath),
                    CreateDt = DateTime.Now,
                    FileName = fileName,
                    FileIcon = GetFileIcon(Path.GetExtension(fileSavePath)),
                    User = currentUser,
                    IsFolder = 1
                };
                //保存数据库
                _myFileServiceRepository.Add(myFile);
                _myFileServiceRepository.SaveChanges();
                string json = new JavaScriptSerializer().Serialize(myFile);
                AlertMsg("上传成功", json);
            }
        }
        private void AlertMsg(string msg, string fileJson)
        {
            Response.ContentType = "text/html";
            Response.Write("<script>parent.showMsg('" + msg + "','" + fileJson + "');</script>");
            Response.End();
        }
        private string GetFileIcon(string fileExt)
        {
            string fileIconPath = "/Content/Images/";
            switch (fileExt.ToLower())
            {
                case ".doc":
                case ".docx":
                    fileIconPath += "DocType.png";
                    break;
                case ".xlx":
                case ".xlxs":
                    fileIconPath += "XlsType.png";
                    break;
                case ".ppt":
                case ".pptx":
                    fileIconPath += "PptType.png";
                    break;
                case ".pdf":
                    fileIconPath += "PdfType.png";
                    break;
                case ".apk":
                    fileIconPath += "ApkType.png";
                    break;
                case ".dwt":
                case ".dwg":
                case ".dws":
                case ".dxf":
                    fileIconPath += "CADType.png";
                    break;
                case ".exe":
                    fileIconPath += "ExeType.png";
                    break;
                case ".png":
                case ".gif":
                case ".jpg":
                    fileIconPath += "ImgType.png";
                    break;
                case ".txt":
                    fileIconPath += "TxtType.png";
                    break;
                case ".bt":
                    fileIconPath += "TorrentType.png";
                    break;
                case ".rmvb":
                case ".avi":
                case ".flv":
                    fileIconPath += "VideoType.png";
                    break;
                case ".zip":
                case ".7z":
                case ".rar":
                    fileIconPath += "MusicType.png";
                    break;
                case ".mp3":
                    fileIconPath += "MusicType.png";
                    break;
                default:
                    fileIconPath += "OtherType.png";
                    break;
            }
            return fileIconPath;
        }
        /// <summary>
        /// 文件下载
        /// </summary>
        /// <param name="fileId"></param>
        public void DownLoadFile(string fileId)
        {
            UserInfo userInfo = Session["user"] as UserInfo;
            if (userInfo == null)
            {
                RedirectToAction("Login", "UserInfo");
                return;
            }
            if (string.IsNullOrEmpty(fileId))
            {
                throw new ArgumentNullException("fileId is errror");
            }
            int id = Convert.ToInt32(fileId);
            var findFile = _myFileServiceRepository.Find(x => x.Id == id);
            if (findFile == null)
            {
                AlertMsg("文件不存在", "");
                return;
            }
            string filePath = Request.MapPath("~/" + findFile.FolderPath + "/" + findFile.FileName);
            //以字符流的形式下载文件
            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";
            //通知浏览器下载文件而不是打开
            Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(findFile.FileName, System.Text.Encoding.UTF8));
            Response.BinaryWrite(bytes);
            Response.Flush();
            Response.End();
        }
        public void DeleteFile(string fileId)
        {
            UserInfo userInfo = Session["user"] as UserInfo;
            if (userInfo == null)
            {
                RedirectToAction("Login", "UserInfo");
                return;
            }
            if (string.IsNullOrEmpty(fileId))
            {
                throw new ArgumentNullException("fileId is errror");
            }
            int id = Convert.ToInt32(fileId);
            var findFile = _myFileServiceRepository.Find(x => x.Id == id);
            if (findFile == null)
            {
                AlertMsg("文件不存在", "");
                return;
            }
            findFile.IsDelete = true;
            _myFileServiceRepository.Update(findFile);
            int count = _myFileServiceRepository.SaveChanges();
            if (count > 0)
            {
                var response = new { code = 4, fileId = findFile.Id };
                Response.Write(new JavaScriptSerializer().Serialize(response));
            }
        }

        public JsonResult EditFileName()
        {
            string fileId = Request.Form["fileId"];
            string fileNewName = Request.Form["fileNewName"];
            UserInfo userInfo = Session["user"] as UserInfo;
            if (userInfo == null)
            {
                RedirectToAction("Login", "UserInfo");
            }
            int id = Convert.ToInt32(fileId);
            var findFile = _myFileServiceRepository.Find(x => x.Id == id);
            findFile.FileName = fileNewName;
            _myFileServiceRepository.Update(findFile);
            int count = _myFileServiceRepository.SaveChanges();
            if (count > 0)
            {
                var response = new
                {
                    code = 200,
                    msg = "更新成功"
                };
                return new JsonResult() { Data = new JavaScriptSerializer().Serialize(response) };
            }
            return new JsonResult() { Data = new JavaScriptSerializer().Serialize(new { code = 500, msg = "保存失败" }) };
        }

        public JsonResult CreateFolder()
        {
            UserInfo userInfo = Session["user"] as UserInfo;

            if (userInfo == null)
            {
                RedirectToAction("Login", "UserInfo");
            }
            string folderPath = Server.UrlDecode(Request.Params["folderPath"]);
            string folderName = Request.Params["folderName"];
            if (string.IsNullOrEmpty(folderName))
            {
                throw new ArgumentNullException("文件夹名称不能为空");
            }
            //检查文件夹是否已经存在
            Expression<Func<MyFile, bool>> where = null;
            if (string.IsNullOrEmpty(folderPath))
            {
                where = x => x.User.Id == userInfo.Id && x.IsFolder == 0 && x.IsDelete == false && x.FolderPath == "/NetDisk/Wolfy/";
            }
            else
            {
                where = x => x.User.Id == userInfo.Id && x.IsFolder == 0 && x.IsDelete == false && x.FolderPath == folderPath;
            }
            var count = _myFileServiceRepository.FindAll(where).Count();
            userInfo = _userInfoServiceRepository.Find(x => x.Id == userInfo.Id);
            if (count > 0)
            {
                //如果不存在，则新建，否则进行自动重命名
                folderName = folderName + "(" + (count + 1).ToString() + ")";
            }
            if (string.IsNullOrEmpty(folderPath))
            {
                folderPath = "/NetDisk/" + userInfo.UserName;
            }
            MyFile folder = new MyFile()
            {
                FolderPath = folderPath.TrimEnd('/') + "/",
                FileName = folderName,
                CreateDt = DateTime.Now,
                User = userInfo,
                FileExt = string.Empty,
                FileIcon = "/Content/Images/FolderType.png",
                FileMd5 = string.Empty,
                FileSize = 0,
                IsDelete = false,
                ModifyDt = DateTime.Now
            };
            try
            {
                _myFileServiceRepository.Add(folder);
                _myFileServiceRepository.SaveChanges();
            }
            catch (Exception)
            {
                return new JsonResult() { Data = new JavaScriptSerializer().Serialize(new { code = 500, msg = "创建失败" }) };
            }
            return new JsonResult() { Data = new JavaScriptSerializer().Serialize(new { code = 200, folder = folder }) };
        }
    }
}

HomeController