I have a web page in my asp.net mvc website where user uploads the file. Now my problem is, i need to show the link in a page on click of which user will be able to view the file.
User can upload file or types doc,docx and pdf.
How can i do this.
Please help,
Thank's
The most simple thing you can do is to use System.IO.Directory.GetFiles(..), like this:
var myModel = new myModel {
Files = Directory.GetFiles(#"c:\temp")
}
However, Directory.GetFiles(..) will give you an array of strings, which may a bit hard to work with. If you need to use the files in a bit more object oriented manner, refer to the DirectoryInfo and FileInfo classes.
Example:
var directory = new DirectoryInfo(#"c:\temp");
foreach (FileInfo fi in directory.GetFiles()) {
Console.WriteLine(#"FileName: {0}", fi.Name);
}
MSDN reference: http://msdn.microsoft.com/en-us/library/07wt70x2.aspx
Thank's for the reply.
But i have been looking for something like this, which solved my problem.
[HttpGet]
public ActionResult Index(string id)
{
string extension = id.Substring(id.IndexOf(".") + 1);
string contentType = string.Empty;
if (extension == "doc" || extension == "docx")
{
contentType = "application/msword";
}
else if (extension == "pdf")
{
contentType = "application/pdf";
}
if (string.IsNullOrEmpty(contentType))
{
throw new Exception("Invalid file");
}
return File(Server.MapPath("~/Docs/" + id), contentType);
}
Where id parameter in above code is the filename.
Thank's
If you're asking how to avoid your download links from being intercepted by MVC routing have a look at http://weblogs.asp.net/pjohnson/archive/2010/11/11/mvc-s-ignoreroute-syntax.aspx
Related
I have developed a desktop application which I published using Click Once, my intention is to be able to call up the application in my web application. But this is giving me the following error.
Please, I need help.
This is my Controller Code
public FilePathResult GetFile(string fileName= "TestingApplication.application")
{
var dir = Server.MapPath("~/Common/TestingApp/");
var path = Path.Combine(dir, fileName);
return File(path, GetMimeType(Path.GetExtension(fileName)));
}
private string GetMimeType(string extension)
{
if (extension == ".application" || extension == ".manifest")
return "application/x-ms-application";
else if (extension == ".deploy")
return "application/octet-stream";
else
return "application/x-msdownload";
}
Cannot download the application. The application is missing required files. Contact application vendor for assistance.
Thanks
I later got it working after days of sleepless night. The first thing i did was to delete the content cache on C:\users\username\AppData\Local\Apps\2.0\. And I did rewrite the code to this.
` public ActionResult Download()
{
string path = #"~/Common/TestingApp/TestingApplication.application";
return new RedirectResult(path);
}`
I'm using MvcRazorToPdf in a Azure website and create my PDF's and output them in the browser.
Now i'm creating a new function to directly email the PDF as attachment (without output them in the browser).
Does anybody know if it is possible to save the PDF (with MvcRazorToPdf) as a MemoryStream or Byte[]?
I think you can handle this in ResultFilter, I used below code to allow user to download file and prompt for download popup, in this way you can grab all your memory stream and store somewhere to send email afterwords.
public class ActionDownloadAttribute : ActionFilterAttribute
{
public override void OnResultExecuted(ResultExecutedContext filterContext)
{
filterContext.HttpContext.Response.AddHeader("content-disposition", "attachment; filename=" + "Report.pdf");
base.OnResultExecuted(filterContext);
}
}
[ActionDownload]
public ActionResult GeneratePdf()
{
List<Comment> comments = null;
using (var db = new CandidateEntities())
{
comments = db.Comments.ToList();
}
return new PdfActionResult("GeneratePdf", comments);
}
I have implemented something like that. So basically I have not been changing my method to output PDF. What I have done is used restsharp to make request at URL where I get PDF then what you have is in lines of (this is partial code only so you can get idea )
var client = new RestClient(IAPIurl);
var request = new RestRequest(String.Format(IAPIurl_generatePDF, targetID), Method.GET);
RestResponse response = (RestResponse) client.Execute(request);
// Here is your byte array
response.RawBytes
Otherwise you can use my answer from here where I discussed directly returning a file.
Hope this helps!
Is there a way to stream a file using ASP.NET MVC FileContentResult within the browser with a specific name?
I have noticed that you can either have a FileDialog (Open/Save) or you can stream the file in a browser window, but then it will use the ActionName when you try to save the file.
I have the following scenario:
byte[] contents = DocumentServiceInstance.CreateDocument(orderId, EPrintTypes.Quote);
result = File(contents, "application/pdf", String.Format("Quote{0}.pdf", orderId));
When I use this, I can stream the bytes, but a OPEN/SAVE file dialog is given to the user. I would like to actually stream this file in a browser window.
If I just use the FilePathResult, it shows the file in a browser window, but then when I click on "Save" button to save the file in PDF, it shows me the Action Name as the name of the file.
Has anyone encountered this?
public ActionResult Index()
{
byte[] contents = FetchPdfBytes();
return File(contents, "application/pdf", "test.pdf");
}
and for opening the PDF inside the browser you will need to set the Content-Disposition header:
public ActionResult Index()
{
byte[] contents = FetchPdfBytes();
Response.AddHeader("Content-Disposition", "inline; filename=test.pdf");
return File(contents, "application/pdf");
}
Actually, the absolutely easiest way is to do the following...
byte[] content = your_byte[];
FileContentResult result = new FileContentResult(content, "application/octet-stream")
{
FileDownloadName = "your_file_name"
};
return result;
This might be helpful for whoever else faces this problem. I finally figured out a solution. Turns out, even if we use the inline for "content-disposition" and specify a file name, the browsers still do not use the file name. Instead browsers try and interpret the file name based on the Path/URL.
You can read further on this URL:
Securly download file inside browser with correct filename
This gave me an idea, I just created my URL route that would convert the URL and end it with the name of the file I wanted to give the file. So for e.g. my original controller call just consisted of passing the Order Id of the Order being printed. I was expecting the file name to be of the format Order{0}.pdf where {0} is the Order Id. Similarly for quotes, I wanted Quote{0}.pdf.
In my controller, I just went ahead and added an additional parameter to accept the file name. I passed the filename as a parameter in the URL.Action method.
I then created a new route that would map that URL to the format:
http://localhost/ShoppingCart/PrintQuote/1054/Quote1054.pdf
routes.MapRoute("", "{controller}/{action}/{orderId}/{fileName}",
new { controller = "ShoppingCart", action = "PrintQuote" }
, new string[] { "x.x.x.Controllers" }
);
This pretty much solved my issue.
Previous answers are correct: adding the line...
Response.AddHeader("Content-Disposition", "inline; filename=[filename]");
...will causing multiple Content-Disposition headers to be sent down to the browser. This happens b/c FileContentResult internally applies the header if you supply it with a file name. An alternative, and pretty simple, solution is to simply create a subclass of FileContentResult and override its ExecuteResult() method. Here's an example that instantiates an instance of the System.Net.Mime.ContentDisposition class (the same object used in the internal FileContentResult implementation) and passes it into the new class:
public class FileContentResultWithContentDisposition : FileContentResult
{
private const string ContentDispositionHeaderName = "Content-Disposition";
public FileContentResultWithContentDisposition(byte[] fileContents, string contentType, ContentDisposition contentDisposition)
: base(fileContents, contentType)
{
// check for null or invalid ctor arguments
ContentDisposition = contentDisposition;
}
public ContentDisposition ContentDisposition { get; private set; }
public override void ExecuteResult(ControllerContext context)
{
// check for null or invalid method argument
ContentDisposition.FileName = ContentDisposition.FileName ?? FileDownloadName;
var response = context.HttpContext.Response;
response.ContentType = ContentType;
response.AddHeader(ContentDispositionHeaderName, ContentDisposition.ToString());
WriteFile(response);
}
}
In your Controller, or in a base Controller, you can write a simple helper to instantiate a FileContentResultWithContentDisposition and then call it from your action method, like so:
protected virtual FileContentResult File(byte[] fileContents, string contentType, ContentDisposition contentDisposition)
{
var result = new FileContentResultWithContentDisposition(fileContents, contentType, contentDisposition);
return result;
}
public ActionResult Report()
{
// get a reference to your document or file
// in this example the report exposes properties for
// the byte[] data and content-type of the document
var report = ...
return File(report.Data, report.ContentType, new ContentDisposition {
Inline = true,
FileName = report.FileName
});
}
Now the file will be sent to the browser with the file name you choose and with a content-disposition header of "inline; filename=[filename]".
I hope that helps!
The absolute easiest way to stream a file into browser using ASP.NET MVC is this:
public ActionResult DownloadFile() {
return File(#"c:\path\to\somefile.pdf", "application/pdf", "Your Filename.pdf");
}
This is easier than the method suggested by #azarc3 since you don't even need to read the bytes.
Credit goes to: http://prideparrot.com/blog/archive/2012/8/uploading_and_returning_files#how_to_return_a_file_as_response
** Edit **
Apparently my 'answer' is the same as the OP's question. But I am not facing the problem he is having. Probably this was an issue with older version of ASP.NET MVC?
I adapted it in ASP.NET Core with REST API.
public class FileContentWithFileNameResult : FileContentResult
{
public FileContentWithFileNameResult(byte[] fileContents, string contentType, string fileName)
: base(fileContents, contentType)
{
FileName = fileName;
}
public string FileName { get; private set; }
public override Task ExecuteResultAsync(ActionContext context)
{
var response = context.HttpContext.Response;
response.Headers.Append("Content-Disposition", $"inline; filename={FileName}");
response.Headers.Append("Access-Control-Expose-Headers", "Content-Disposition");
response.Headers.Append("X-Content-Type-Options", "nosniff");
return base.ExecuteResultAsync(context);
}
}
public FileContentResult GetImage(int productId) {
Product prod = repository.Products.FirstOrDefault(p => p.ProductID == productId);
if (prod != null) {
return File(prod.ImageData, prod.ImageMimeType);
} else {
return null;
}
}
I've been working all weekend on a Messaging system for my website so users can send and receive messages on my site internally.
I have my table schemas worked out, and right now I can send basic messages to different users.
Now, I'm working on the attachments portion.
How can I create my action methods so that they accept Files? Ideally I would like to allow for a controller action that accepts an arbitrary number of files. Once they have been passed into the controller action I'm going to save them somewhere on my webserver.
Can anyone show me an example of a controller action that accepts files as part of its parameters?
(Error handling omitted.)
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult FilePost()
{
for (var i = 0; i < Request.Files.Count; i++)
{
var filebase = Request.Files.Get(i);
string filePath = Server.MapPath(Url.Content("~/Content/UserContent/"));
var fileName = // whatever
filebase.SaveAs(Path.Combine(filePath, fileName));
}
return RedirectToAction("Something");
}
I believe the object you're looking for is Request.Files example snippet below.
foreach (string file in Request.Files) {
var hpf = Request.Files[file];
if (hpf.ContentLength == 0)
continue;
myFileEntity.ContentType = hpf.ContentType;
myFileEntity.File = hpf.InputStream.ToByteArray();
myFileEntity.FileName = hpf.FileName;
}
Here is a post on how to Upload file with ASP.NET MVC
Check out my answer in this post.
Having troubles calling a controller post method
I need to create an ActionResult in an ASP.NET MVC application which has a .csv filetype.
I will provide a 'do not call' email list to my marketing partners and i want it to have a .csv extension in the filetype. Then it'll automatically open in Excel.
http://www.example.com/mailinglist/donotemaillist.csv?password=12334
I have successfully done this as follows, but I want to make sure this is the absolute best and recommended way of doing this.
[ActionName("DoNotEmailList.csv")]
public ContentResult DoNotEmailList(string username, string password)
{
return new ContentResult()
{
Content = Emails.Aggregate((a,b)=>a+Environment.NewLine + b),
ContentType = "text/csv"
};
}
This Actionmethod will respond to the above link just fine.
I'm just wondering if there is any likelihood of any unexpected conflict of having the file extension like this with any different version of IIS, any kind of ISAPI filter, or anything else I cant think of now.
I need to be 100% sure because I will be providing this to external partners and don't want to have to change my mind later. I really cant see any issues, but maybe theres something obscure - or another more "MVC" like way of doing this.
I used the FileContentResult action to also do something similar.
public FileContentResult DoNotEmailList(string username, string password)
{
string csv = Emails.Aggregate((a,b)=>a+Environment.NewLine + b);
byte[] csvBytes = ASCIIEncoding.ASCII.GetBytes( csv );
return File(csvBytes, "text/csv", "DoNotEmailList.csv");
}
It will add the content-disposition header for you.
I think your Response MUST contain "Content-Disposition" header in this case. Create custom ActionResult like this:
public class MyCsvResult : ActionResult {
public string Content {
get;
set;
}
public Encoding ContentEncoding {
get;
set;
}
public string Name {
get;
set;
}
public override void ExecuteResult(ControllerContext context) {
if (context == null) {
throw new ArgumentNullException("context");
}
HttpResponseBase response = context.HttpContext.Response;
response.ContentType = "text/csv";
if (ContentEncoding != null) {
response.ContentEncoding = ContentEncoding;
}
var fileName = "file.csv";
if(!String.IsNullOrEmpty(Name)) {
fileName = Name.Contains('.') ? Name : Name + ".csv";
}
response.AddHeader("Content-Disposition",
String.Format("attachment; filename={0}", fileName));
if (Content != null) {
response.Write(Content);
}
}
}
And use it in your Action instead of ContentResult:
return new MyCsvResult {
Content = Emails.Aggregate((a,b) => a + Environment.NewLine + b)
/* Optional
* , ContentEncoding = ""
* , Name = "DoNotEmailList.csv"
*/
};
This is how I'm doing something similar. I'm treating it as a download:
var disposition = String.Format(
"attachment;filename=\"{0}.csv\"", this.Model.Name);
Response.AddHeader("content-disposition", disposition);
This should show up in the browser as a file download with the given filename.
I can't think of a reason why yours wouldn't work, though.
The answer you accepted is good enough, but it keeps the content of the output in memory as it outputs it. What if the file it generates is rather large? For example, when you dump a contents of the SQL table. Your application could run out of memory. What you do want in this case is to use FileStreamResult. One way to feed the data into the stream could be using pipe, as I described here