Ajax.BeginForm in MVC to upload files
Solution 1
That is complicated better use jquery forms plugin.
Here is the sample:
Html.BeginForm
@using (Html.BeginForm("YourAction", "YourController"))
{
@Html.AntiForgeryToken()
<input type="file" name="files"><br>
<input type="submit" value="Upload File to Server">
}
Action Method
[HttpPost]
[ValidateAntiForgeryToken]
public void YourAction(IEnumerable<HttpPostedFileBase> files)
{
if (files != null)
{
foreach (var file in files)
{
// Verify that the user selected a file
if (file != null && file.ContentLength > 0)
{
// extract only the fielname
var fileName = Path.GetFileName(file.FileName);
// TODO: need to define destination
var path = Path.Combine(Server.MapPath("~/Upload"), fileName);
file.SaveAs(path);
}
}
}
}
Progress Bar
<div class="progress progress-striped">
<div class="progress-bar progress-bar-success">0%</div>
</div>
Jquery & Form script
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.js"></script>
<script src="http://malsup.github.com/jquery.form.js"></script>
<script>
(function() {
var bar = $('.progress-bar');
var percent = $('.progress-bar');
var status = $('#status');
$('form').ajaxForm({
beforeSend: function() {
status.empty();
var percentVal = '0%';
bar.width(percentVal)
percent.html(percentVal);
},
uploadProgress: function(event, position, total, percentComplete) {
var percentVal = percentComplete + '%';
bar.width(percentVal)
percent.html(percentVal);
},
success: function() {
var percentVal = '100%';
bar.width(percentVal)
percent.html(percentVal);
},
complete: function(xhr) {
status.html(xhr.responseText);
}
});
})();
</script>
Update...
People who are getting issue of calling action method twice is due to Ajax.BeginForm, just convert it to Html.BeginForm(). For more clarification and to download sample code please refer at this blog.
Solution 2
The answer from Ashwini Verma
is almost correct but it has a drawback, the form is submitted twice.
This is caused by the use of Ajax.BeginForm()
. Using Html.BeginForm()
will fix it.
Here's an example:
@* do not use Ajax.BeginForm() as it would cause the form to submit twice in connection with jQuery.Form *@
@using (var lForm = Html.BeginForm(
<ActionName>, <ControllerName>, FormMethod.Post,
new Dictionary<string, object> {{"name", <YourFormName>}, {"enctype", "multipart/form-data"}}))
{
Solution 3
You need html5 file handling and read file contents on client to get base64 encoded data.
On client you have to put:
<div>
@Html.HiddenFor(m => m.AttachmentFileName)
@Html.HiddenFor(m => m.AttachmentFileSize)
@Html.HiddenFor(m => m.AttachmentFileType)
@Html.HiddenFor(m => m.AttachmentFileContentsBase64)
<input type="file" name="AttachmentFile" id="AttachmentFile" onchange="handleAttachmentFileChange(this.files)" />
@Html.ValidationMessageFor(m => m.AttachmentFile)
</div>
<script>
function handleAttachmentFileChange(files) {
var file = files[0];
$("#AttachmentFileName").val(file.name);
$("#AttachmentFileSize").val(file.size);
$("#AttachmentFileType").val(file.type || "application/octet-stream");
var fileReader = new FileReader();
fileReader.onload = function () {
fileReader.result;
$("#AttachmentFileContentsBase64").val(fileReader.result);
};
fileReader.readAsDataURL(file);
};
</script>
So your code will fill hidden fields with file data (filename, type, size, base64 encoded contents). And on server side you put:
if (AttachmentFileSize > 0)
{
string fileName = AttachmentFileName.Contains("\\") ? AttachmentFileName.Substring(AttachmentFileName.LastIndexOf("\\") + 1) : AttachmentFileName;
byte[] fileBytes = Convert.FromBase64String(AttachmentFileContentsBase64.Substring(AttachmentFileContentsBase64.IndexOf(',') + 1));
//save file to file system or db
ModelState.Remove("CurrentAttachmentFileId");
ModelState.Remove("CurrentAttachmentFileName");
}
else if (AttachmentFileSize == -1)
{
//remove existing file from fs or db
}
The code needs to be modified with your models and logic but it worked for me
Alexander C.
Updated on August 30, 2020Comments
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Alexander C. over 3 years
I was trying to use an example mentioned here How to do a ASP.NET MVC Ajax form post with multipart/form-data?
But I keep getting "fail" error message box
Index.cshtml
<script src="~/Scripts/jquery-1.8.2.min.js"></script> <script src="~/Scripts/jquery.unobtrusive-ajax.min.js"></script> <h2>Files Upload</h2> <script type="text/javascript"> $(function() { $("#form0").submit(function(event) { var dataString; event.preventDefault(); var action = $("#form0").attr("action"); if ($("#form0").attr("enctype") == "multipart/form-data") { //this only works in some browsers. //purpose? to submit files over ajax. because screw iframes. //also, we need to call .get(0) on the jQuery element to turn it into a regular DOM element so that FormData can use it. dataString = new FormData($("#form0").get(0)); contentType = false; processData = false; } else { // regular form, do your own thing if you need it } $.ajax({ type: "POST", url: action, data: dataString, dataType: "json", //change to your own, else read my note above on enabling the JsonValueProviderFactory in MVC contentType: contentType, processData: processData, success: function(data) { //BTW, data is one of the worst names you can make for a variable }, error: function(jqXHR, textStatus, errorThrown) { //do your own thing alert("fail"); } }); }); //end .submit() }); </script> <div id="uploadDiv"> @Html.Action("Files", "Home") </div> @using (Ajax.BeginForm("Files", "Home", new AjaxOptions { UpdateTargetId = "uploadDiv", HttpMethod = "Post" }, new { enctype = "multipart/form-data", @id="form0"})) { <div> <div>Upload new file: <input type="file" name="file" /></div> <input type="submit" value="Save" /> </div> } <br />
Controller
public PartialViewResult Files(HttpPostedFileBase file) { IEnumerable<string> files; if ((file != null) && (file.ContentLength > 0)) { string fileName = file.FileName; string saveLocation = @"D:\Files"; string fullFilePath = Path.Combine(saveLocation, fileName); try { file.SaveAs(fullFilePath); FileInfo fileInfo = new FileInfo(fullFilePath); file.InputStream.Read(new byte[fileInfo.Length], 0, file.ContentLength); } catch (Exception e) { TempData["FileUpload"] = e.Message; return PartialView(); } files = Directory.GetFiles(@"D:\Files\"); return PartialView(files); } else { files = Directory.GetFiles(@"D:\Files\"); return PartialView(files); } }
Files.cshtml
@model IEnumerable<string> @foreach (string f in Model) { <p>@f</p> }
Global.asax
ValueProviderFactories.Factories.Add(new JsonValueProviderFactory());
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Ashwini Verma over 10 yearstry adding dataType: 'json', type: "POST", contentType: "application/json" in $('form').ajaxForm();
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Haris N I about 10 yearsAfter adding this code in IE file uploder is disabled
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Saroj over 9 years@AshwiniVerma - With this I am not getting selected file in argument of the method - files,it is coming as null.Can you please tell me about this.Also I have not added Jquery and form script since I dont want progress bar.
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Ashwini Verma over 9 years@Saroj: You make sure file input's name attribute matches with action method's argument. In my example, it's name="files" <input type="file" name="files">.
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Saroj over 9 years@AshwiniVerma : I have checked those and it is fine ,still in argument the files shows null.Please help me..I need to solve this,its too urgent for me.If u want I can show you the code.I followed the exact steps mentioned by you even included the couple of links( src scripts) but not working.
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Saroj over 9 yearsI just want that file to be caught in the argument,rest I can take care of..Please help me
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Hichamveo over 9 years@AshwiniVerma : your sample work fine, but i don't understand why the action is called twice? first with null parameter and the second with non null parameter?
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JoshYates1980 over 9 yearsThis is a void method. After I submit, I want to return back to the form.
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kavain over 8 yearsYou are right. It send the form twice, but how to work with Html.BeginForm() and put a UpdateTargetId?
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ViRuSTriNiTy over 8 years@kavain Have a look at the HTML code generated by Ajax.BeginForm() and adopt it to the Html.BeginForm() call. It's basically all HTML tag attributes that will be parsed by the jQuery Ajax Unobtrusive plugin. So if you ensure that the attributes for the update target are generated correctly then target update should also work.
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Andreas about 7 yearsthis is going to prevent updates. I cannot even change the view when adding this script
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stomy almost 7 years
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nickornotto about 6 years@Saroj multipart/form-data is missing, use using (Html.BeginForm("YourAction", "YourController", FormMethod.Post, new { enctype = "multipart/form-data" }))