ASP. NET complete File Upload Code tutorial

This article mainly introduces the ASP. NET core MVC implementation File Upload example, with a certain reference value, interested in small partners can refer to.

Work with the file upload function, under this share ~ ~

Controller:

public class Picturecontroller:controller {private Ihostingenvironment hostingenv;    Public Picturecontroller (Ihostingenvironment env) {this.hostingenv = env;    }//GET:/<controller>/public iactionresult Index () {return View ();    } public Iactionresult Uploadfiles () {return View ();      } [HttpPost] public iactionresult uploadfiles (ilist<iformfile> files) {long size = 0; foreach (var file in files) {var filename = contentdispositionheadervalue. Parse (file. contentdisposition). FileName.        Trim (' "');        This hostingenv.webrootpath is to save the address can be changed under filename = Hostingenv.webrootpath + $@ "\{filename}"; Size + = file.        Length; using (FileStream fs = System.IO.File.Create (filename)) {File.          CopyTo (FS); Fs.        Flush (); }} viewbag.message = $ "{files.       Count} file (s)/{size}bytes uploaded successfully! "; REturn View (); }  }

View

<form asp-action= "Uploadfiles"         asp-controller= "picture"         method= "post" enctype=         "multipart/ Form-data ">        <input type=" file "name=" files "multiple/>        <input type=" Submit "value=" Upload Selected Files "/> </form>

The file is uploaded to the wwwroot directory file, which I also do not understand is still learning, welcome everyone to Exchange ~ ~

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Here's the jquery Ajax way to upload

The z-parameter of the action of the post mode is useless because there is only one post method that will be 404 error, so add a Get action

Controller:

    Public Iactionresult Uploadfilesajax ()    {      return View ();    }    [HttpPost]    Public Iactionresult Uploadfilesajax (string z)     {      long size = 0;      var files = Request.Form.Files;      foreach (var file in files)      {        var filename = contentdispositionheadervalue                . Parse (file. contentdisposition)                . FileName                . Trim (' "');        filename = @ "C:\USERS\LG. Hl\desktop "+ $@" \{filename} ";            Size + = file. Length;        using (FileStream fs = System.IO.File.Create (filename))        {          File. CopyTo (FS);          Fs. Flush ();        }      }      String message = $ "{files. Count} file (s)/{size}bytes uploaded successfully! ";        return Json (message);    }

View

<form method= "POST" enctype= "Multipart/form-data" >      <input type= "file" id= "Files"          name= "Files" Multiple/>      <input type= "button"          id= "upload"          value= "upload Selected Files"/> </form>

Jquery

<script type= "Text/javascript" >    $ (document). Ready (function () {      $ ("#upload"). Click (function (evt) {        var fileUpload = $ ("#files"). Get (0);        var files = fileupload.files;        var data = new FormData ();        for (var i = 0; i < files.length; i++) {          data.append (files[i].name, files[i]);        }        $.ajax ({          type: "POST",          URL: "/picture/uploadfilesajax",          Contenttype:false,          Processdata:false,          Data:data,          success:function (message) {            alert (message);          },          error:function () {            Alert ("There was error uploading files!");});});    </script>

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