I have this code in my HomeController
[HttpPost]
public ActionResult NewRequest(int? id, FormCollection form, HttpPostedFileBase uploadFile)
{
if (uploadFile != null && uploadFile.ContentLength > 0)
{
// extract only the fielname
var fileName = Path.GetFileName(uploadFile.FileName);
// store the file inside ~/App_Data/uploads folder
var path = Path.Combine(Server.MapPath("~/Documents/Files"), fileName);
uploadFile.SaveAs(path);
}
// redirect back to the index action to show the form once again
return RedirectToAction("Index");
}
And my NewRequest view is this
#using (Html.BeginForm("NewRequest", "Controllers", FormMethod.Post, new { enctype = "multipart/form-data"}))
{
<input type="file" name="uploadFile" />
<input type="submit" value="Upload" />
}
The problem is that the uploaded file, .txt file f.x. is always null.
Your given code is fine. The only case I can think otherwise is you route config is probably not right.
I've tested with this config and it worked like a charm.
routes.MapRoute(
name: "NewRequest",
url: "Controllers/NewRequest",
defaults: new { controller = "Controllers", action = "NewRequest" }
);
Related
OK, so I am trying to make the move to MVC.
I have a Model, view and Controller made, but now I want to change the create functionality of the app.
I am working with uploads and I have this system generated code in my contoller.
Function Create(<Bind(Include:="Id,Course,Category,SubCategory,FileName,FileType,UploadedBy,DateUploaded")> ByVal acAsset As acAsset) As ActionResult
If ModelState.IsValid Then
db.Assets.Add(acAsset)
db.SaveChanges()
Return RedirectToAction("Index")
End If
Return View(acAsset)
End Function
Now I want to change this so that it will
Check for the existence of a folder for Course, Category and Sub category. If this folder is not there it must be created.
Upload the file select by a file selection box.
Post the files' name to the db.
The code is not necessarily the issue, I am jut not sure where I should put in the controller?
I have read this article but is not dealing with the DB post.
Thank you in advance.
You just add your code in controller that you want to hit on button click
Your Razor View Code
#using (Html.BeginForm("Upload", "Upload", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type="file" name="file" />
<input type="submit" name="Submit" id="Submit" value="Upload" />
}
C# Code
[HttpPost]
public ActionResult Upload(HttpPostedFileBase file)
{
if (file != null && file.ContentLength > 0)
{
var fileName = Path.GetFileName(file.FileName);
var path = Path.Combine(Server.MapPath("~/Images/"), fileName);
file.SaveAs(path);
}
return RedirectToAction("UploadDocument");
}
}
In your View
<input type="file" name="file">
In your Controller
public actionresult(HttpPostedFileBase file)
{
string filename = Path.GetFileName(file.FileName);
string contentType = file.ContentType;
using (Stream fs = file.InputStream)
{
using (BinaryReader br = new BinaryReader(fs))
{
byte[] bytes = br.ReadBytes((Int32)fs.Length);
}
}
//Data Context Code here
tableName.File= bytes;
db.add(tableName);
db.SaveChanges();
}
I'm currently using Entity Framework Code First approach for my asp.net MVC3(aspx syntax) project.
I have a model in my project called EmployeeModel
public class EmployeeModel
{
public string imageinfo;
public string fileinfo;
}
My DbContext is
public class ContextDB:DbContext
{
public DbSet<EmployeeModel> Employee { get; set; }
}
I would like to have a file browser for both fileinfo and imageinfo in my view to upload the files and images and the path of the files and images need to be stored in the database.
Can anyone please help?
Try using
.chtml
#using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type="file" name="file" />
<input type="submit" value="OK" />
}
Controller
public class HomeController : Controller
{
// This action renders the form
public ActionResult Index()
{
return View();
}
// This action handles the form POST and the upload
[HttpPost]
public ActionResult Index(HttpPostedFileBase file)
{
// Verify that the user selected a file
if (file != null && file.ContentLength > 0)
{
// extract only the fielname
var fileName = Path.GetFileName(file.FileName);
// store the file inside ~/App_Data/uploads folder
var path = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
file.SaveAs(path);
}
// redirect back to the index action to show the form once again
return RedirectToAction("Index");
}
}
In Asp.Net MVC we have to use HttpPostedFileBase for Uploaded files as shown below :-
Controller :
[HttpPost]
public ActionResult Upload(HttpPostedFileBase file)
{
if (file != null) // file here will have your posted file which you post from view
{
int byteCount = file.ContentLength; <---Your file Size or Length
byte[] yourfile = new byte[file.ContentLength];
file.InputStream.Read(yourfile , 0, file.ContentLength);
var doc1 = System.Text.UnicodeEncoding.Default.GetString(empfile);
// now doc1 will have your image in string format and you can save it to database.
}
}
View :
#using (Html.BeginForm("Upload", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type="file" name="file" />
<input type="submit" value="OK" />
}
My Controller
public ActionResult Edit(int id)
{
return this.EditDefault(id);
}
[HttpPost]
public ActionResult Edit(int id, Models.Company model)
{
return this.EditDefault(id, model);
}
My Model
pulbic class Company
{
... Many other Propeties
public HttpPostedFileBase File { get; set; }
}
My View
#using (Html.BeginForm(new { enctype = "multipart/form-data" }))
{
... Many other Properties
#Html.TextBoxFor(m => m.File, new
{
type = "file", style = "display:none"
})
... Submit
}
So my problem now is when I submit the page the infos in the model are right, but the File Property is still null.
I found some solutions where people added HttpPostedFileBase as parmeter in the controller (tried it doesn't work too), but I would like to avoid that anyway because the model and the controller are generated with T4. So has someone an idea why the File Property is always null?
Would be really happy about some help :)
Update: Found the solution thx to Matt Tabor.
For me the solution looks like this because I use a shared Edit page.
The javascript part is to hide the actual file upload element and use a span instead, because the file upload isn't style able.
//Shared Part
#{
RouteData routeData = this.ViewContext.RouteData;
string currentController = routeData.GetRequiredString("controller");
}
#using (Html.BeginForm("Edit", currentController, null, FormMethod.Post, new { enctype = "multipart/form-data" }))
{
//Special Part
... Many other Properties
//File upload which is hidden
#Html.TextBoxFor(m => m.File, new
{
type = "file", style = "display:none"
})
//Span which forwards the clicks to the file upload
<span id="fake-file-name">Kein Bild</span>
... Submit
}
<script type="text/javascript">
$(function () {
//forward the click from the span to the file upload
$("#fake-file-name").click(function () {
$("#File").click();
});
//display the chosen file name to the user with the styled span
$("#File").bind('change', function () {
//we don't want the C:\fakepath to show
var displayFileName = this.value.replace("C:\\fakepath\\", "");
$("#fake-file-name").text(displayFileName);
});
});
</script>
you need to specify your form method as post
#using (Html.BeginForm("Edit", "CONTROLLER", null,FormMethod.Post, new { enctype = "multipart/form-data" }))
#Html.TextBoxFor(m => m.File, new
{
type = "file", style = "display:none"
})
Instead have a Input type file as shown below -
<input type="file" name="File" id="File"/>
PS: Name should match to Model property name.
UPDATE
Remove display:none from your code and it should work fine.
I'm new to ASP MVC and I've been trying to upload a bitmap file from hard drive to a C# Bitmap object, which I would later assign to my Model.
The view (cshtml file) looks like this:
<form action = "DisplayAddedPicture" method=post>
<input type=file name="Picture" id = "Picture"/>
<input type=submit value="Send!" />
</form>
And the DisplayAddedPicture method from controller:
[HttpPost]
public ActionResult DisplayAddedPicture()
{
HttpPostedFileBase File = Request.Files["Picture"];
if (File == null) throw new Exception("NullArgument :( ");
// file stream to byte[]
MemoryStream target = new MemoryStream();
File.InputStream.CopyTo(target);
byte[] TempByteArray = target.ToArray();
// byte[] to Bitmap
ImageConverter imageConverter = new ImageConverter();
Image TempImage = (Image)imageConverter.ConvertFrom(TempByteArray);
Bitmap FinalBitmap = new Bitmap(TempImage);
// (...)
}
It turns out that every time all I get is an Exception, as the HttpPostedFileBase object is always null. Is there any flow in my logic (apart from all of those conversions which come afterwards, I know they're messy) or is there any other way to solve this?
Try this
In your View,
#using (Html.BeginForm("DisplayAddedPicture", "YourControllerName",
FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type=file name="Picture" id = "Picture"/>
<input type=submit value="Send!" />
}
And the Action method
[HttpPost]
public ActionResult DisplayAddedPicture(HttpPostedFileBase Picture)
{
if (Picture!= null && Picture.ContentLength > 0)
{
//Do some thing with the Picture object
//try to save the file here now.
//After saving follow the PRG pattter (do a redirect)
//return RedirectToAction("Uploaded");
}
return View();
}
Try adding the following to your form tag: enctype="multipart/form-data"
<form method="post" action="DisplayAddedPicture" enctype="multipart/form-data">
<input type=file name="Picture" id = "Picture"/>
<input type=submit value="Send!" />
</form>
I have a partial view:
<% using (Html.BeginForm("add", "home", FormMethod.Post,
new { enctype = "multipart/form-data" })){%>
<input name="IncomingFiles" type="file" />
<div class="editor-field"><%: Html.TextBox("TagsInput") %></div>
<p><input type="submit" value="Create" /></p><% } %>
And this in the controller:
[HttpPost]
public ActionResult add(HttpFileCollection IncomingFiles, string TagsInput)
{
return View();
}
It will simply not match up my uploaded file to the HttpFileCollection, they come out as HttpFileCollectionBase.
How can i get the view to pass me a HttpFileCollection?
Do i need any specific BeginForm args?
Thank you!
Do something like this instead on your action side. You don't pass the files as parameters:
[HttpPost]
public ActionResult add(string TagsInput) {
if (Request.Files.Count > 0) {
// for this example; processing just the first file
HttpPostedFileBase file = Request.Files[0];
if (file.ContentLength == 0) {
// throw an error here if content length is not > 0
// you'll probably want to do something with file.ContentType and file.FileName
byte[] fileContent = new byte[file.ContentLength];
file.InputStream.Read(fileContent, 0, file.ContentLength);
// fileContent now contains the byte[] of your attachment...
}
}
return View();
}