asp. net core mvc Implementation File Upload Instance
- 2021-09-11 19:53:15
- OfStack
Work with the function of uploading files, under this sharing ~ ~
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 That is, the address to be saved can be changed
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 don't understand. I am still learning. Welcome to communicate ~ ~
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The following is uploaded in jquery ajax mode
The z parameter of action of post mode is useless because there is only one post mode with 404 error, so another action of get is added
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>