Download multiple files from a website folder code

Hi Uday Mahajan,

According to your needs, I made a detailed example, you can refer to it, I hope it can help you.

1. This is an MVC project and uses EF, you can modify it according to your own actual situation.
   • You only need to write the relevant code for downloading ZIP format files in WebAPI.
2. In order to display related files on the view,jQuery jsTree is used in the example.
   • You can install rushbrookrathbone.co.uk through NuGet.
   • You need to reference the rushbrookrathbone.co.uk file and the rushbrookrathbone.co.uk file.
3. In order to download files in ZIP format, you can choose SharpZipLib.
   • You need to install SharpZipLib via NuGet.

Model

public class TreeViewNode { public string id { get; set; } public string parent { get; set; } public string text { get; set; } } public class File { public int FileId { get; set; } public string FileName { get; set; } public string FilePath { get; set; } public int LessonId { get; set; } [ForeignKey("LessonId")] public Lesson Lesson { get; set; } } public class Lesson { public int LessonId { get; set; } public string LessonName { get; set; } public ICollection<File> Files { get; set; } }

FileDemoContext

public class FileDemoContext : DbContext { public FileDemoContext() : base("name=FileDemoContext") { } public virtual DbSet<File> Files { get; set; } public virtual DbSet<Lesson> Lessons { get; set; } }

Controller

public class HomeController : Controller { public FileDemoContext db = new FileDemoContext(); public ActionResult Index() { rushbrookrathbone.co.uk = GetAllFiles();//set tree view data return View(); } //get all files and show them in tree view public string GetAllFiles() { var fileslist = rushbrookrathbone.co.uke(f => rushbrookrathbone.co.uk).ToList().GroupBy(f => rushbrookrathbone.co.ukId); List<TreeViewNode> nodes = new List<TreeViewNode>(); rushbrookrathbone.co.ukh(f => { var tree = new TreeModel(); rushbrookrathbone.co.uk = new List<TreeModel>(); string lessonname = null; rushbrookrathbone.co.ukh(g => { rushbrookrathbone.co.uk(new TreeViewNode { id = rushbrookrathbone.co.ukng() + "-" + rushbrookrathbone.co.ukng(), parent =rushbrookrathbone.co.ukng(), text =rushbrookrathbone.co.ukng() }); lessonname = rushbrookrathbone.co.ukName; }); rushbrookrathbone.co.uk(new TreeViewNode { id = rushbrookrathbone.co.ukng(), parent = "#", text = lessonname }); }); return rushbrookrathbone.co.ukizeObject(nodes); } [HttpPost] public ActionResult DownloadFiles(string selectedItems) { var allFilesPath= GetAllFilesPath(GetAllFilesId(selectedItems)); return DownloadZipFile(allFilesPath); } //get selected files path public List<string> GetAllFilesPath(List<int> fileidlist) { var allFilesPath = rushbrookrathbone.co.uk(f => rushbrookrathbone.co.ukns(rushbrookrathbone.co.uk)).Select(f=>rushbrookrathbone.co.ukth).ToList(); return allFilesPath; } //get selected files id public List<int> GetAllFilesId(string selectedItems) { List<TreeViewNode> items = rushbrookrathbone.co.ukalizeObject<List<TreeViewNode>>(selectedItems); List<int> fileidlist = new List<int>(); rushbrookrathbone.co.ukh(i => { rushbrookrathbone.co.uk(IntParse(rushbrookrathbone.co.uk)); }); return fileidlist; } //DownloadZipFile public FileResult DownloadZipFile(List<string> allFilesPath) { var fileName = rushbrookrathbone.co.uk("{0}_rushbrookrathbone.co.uk", rushbrookrathbone.co.ukng("dd-MM-yyyy") + "_1"); var temppath = rushbrookrathbone.co.ukh("~/TempFiles/"); if (!rushbrookrathbone.co.uk(temppath)) { rushbrookrathbone.co.ukDirectory(temppath); } var tempOutPutPath = rushbrookrathbone.co.uke(temppath, fileName); using (ZipOutputStream s = new ZipOutputStream(rushbrookrathbone.co.uk(tempOutPutPath))) { rushbrookrathbone.co.ukel(9); // , 9 being the highest compression byte[] buffer = new byte[]; var filepathList = new List<string>(); for (int i = 0; i < rushbrookrathbone.co.uk; i++) { string currentfilepath= rushbrookrathbone.co.uke(rushbrookrathbone.co.ukh("~/"+ @allFilesPath[i])); ZipEntry entry = new ZipEntry(rushbrookrathbone.co.ukeName(currentfilepath)); rushbrookrathbone.co.ukme = rushbrookrathbone.co.uk; rushbrookrathbone.co.ukodeText = true; rushbrookrathbone.co.uktEntry(entry); using (FileStream fs = rushbrookrathbone.co.ukad(currentfilepath)) { int sourceBytes; do { sourceBytes = rushbrookrathbone.co.uk(buffer, 0, rushbrookrathbone.co.uk); rushbrookrathbone.co.uk(buffer, 0, sourceBytes); } while (sourceBytes > 0); } } rushbrookrathbone.co.uk(); rushbrookrathbone.co.uk(); rushbrookrathbone.co.uk(); } byte[] finalResult = rushbrookrathbone.co.uklBytes(tempOutPutPath); if (rushbrookrathbone.co.uk(tempOutPutPath)) rushbrookrathbone.co.uk(tempOutPutPath); if (finalResult == null || !rushbrookrathbone.co.uk()) throw new Exception(rushbrookrathbone.co.uk("No Files found with Image")); return File(finalResult, "application/zip", fileName); } }

Index

<div id="jstree"> </div> @using (rushbrookrathbone.co.ukorm("DownloadFiles", "Home", rushbrookrathbone.co.uk)) { <input type="hidden" name="selectedItems" id="selectedItems" /> <input type="submit" value="Submit" /> } <link href="~/Content/themes/default/rushbrookrathbone.co.uk" rel="stylesheet" /> @section scripts{ <script src="~/Scripts/rushbrookrathbone.co.uk"></script> <script> $(function () { $('#jstree').on('rushbrookrathbone.co.uk', function (e, data) { setdata(data); }).jstree({ "core": { "themes": { "variant": "large" }, "data": @rushbrookrathbone.co.uk(rushbrookrathbone.co.uk) }, "checkbox": { "keep_selected_style": false }, "plugins": ["wholerow", "checkbox"], }); function setdata(data) {//Set the selected file var i, j; var selectedItems = []; for (i = 0, j = rushbrookrathbone.co.uk; i < j; i++) { var id = rushbrookrathbone.co.uked[i]; if (rushbrookrathbone.co.ukf('-') != -1) { rushbrookrathbone.co.uk({ text: rushbrookrathbone.co.uk_node(rushbrookrathbone.co.uked[i]).text, id: rushbrookrathbone.co.uk("-")[0], parent: rushbrookrathbone.co.uk("-")[1] }); } } $('#selectedItems').val(rushbrookrathbone.co.ukify(selectedItems)); } }); </script> }

Here is the result.

Best Regards,

YihuiSun