CODEWITHSUNDEEP
asp.nethttpcsv
balaweblog
balaweblog

Reputation: 15470

Response Content type as CSV

I need to send a CSV file in HTTP response. How can I set the output response as CSV format?

This is not working:

Response.ContentType = "application/CSV";

Upvotes: 409

Views: 510170

Answers (11)

sastanin
sastanin

Reputation: 41511

MIME type of the CSV is text/csv according to RFC 4180.

Upvotes: 212

Suresh Kamrushi
Suresh Kamrushi

Reputation: 16086

For C# MVC 4.5 you need to do like this:

Response.Clear();
Response.ContentType = "application/CSV";
Response.AddHeader("content-disposition", "attachment; filename=\"" + fileName + ".csv\"");
Response.Write(dataNeedToPrint);
Response.End();
return new EmptyResult();  //this line is important else it will not work.

Upvotes: 0

Wookie
Wookie

Reputation: 41

I have found that the problem with IE is that it sniffs the return data and makes up its own mind about what content-type it thinks it has been sent. There are a number of side effect that this causes, such as always openning a saveAs dialog for text files because you are using compression of data trasnferes. The solution is (in php code)......

header('X-Content-Type-Options: nosniff');

Upvotes: 4

ibz
ibz

Reputation: 46709

Use text/csv as the content type.

Upvotes: 87

Rob Church
Rob Church

Reputation: 6943

In ASP.net MVC, you can use a FileContentResult and the File method:

public FileContentResult DownloadManifest() {
    byte[] csvData = getCsvData();
    return File(csvData, "text/csv", "filename.csv");
}

Upvotes: 5

Jaider
Jaider

Reputation: 14884

I suggest to insert an '/' character in front of 'myfilename.cvs'

Response.AddHeader("Content-Disposition", "attachment;filename=/myfilename.csv");

I hope you get better results.

Upvotes: 2

dangerous
dangerous

Reputation: 559

Over the years I've been honing a perfect set of headers for this that work brilliantly in all browsers that I know of

// these headers avoid IE problems when using https:
// see http://support.microsoft.com/kb/812935
header("Cache-Control: must-revalidate");
header("Pragma: must-revalidate");

header("Content-type: application/vnd.ms-excel");
header("Content-disposition: attachment; filename=$filename.csv");

Upvotes: 55

AnthonyWJones
AnthonyWJones

Reputation: 189457

Using text/csv is the most appropriate type.

You should also consider adding a Content-Disposition header to the response. Often a text/csv will be loaded by a Internet Explorer directly into a hosted instance of Excel. This may or may not be a desirable result.

Response.AddHeader("Content-Disposition", "attachment;filename=myfilename.csv");

The above will cause a file "Save as" dialog to appear which may be what you intend.

Upvotes: 589

VINKAS India
VINKAS India

Reputation:

Just Use like that

Response.Clear();
Response.ContentType = "application/CSV";
Response.AddHeader("content-disposition", "attachment; filename=\"" + filename + ".csv\"");
Response.Write(t.ToString());
Response.End();

Upvotes: 15

David Sklar
David Sklar

Reputation:

Setting the content type and the content disposition as described above produces wildly varying results with different browsers:

IE8: SaveAs dialog as desired, and Excel as the default app. 100% good.

Firefox: SaveAs dialog does show up, but Firefox has no idea it is a spreadsheet. Suggests opening it with Visual Studio! 50% good

Chrome: the hints are fully ignored. The CSV data is shown in the browser. 0% good.

Of course in all of these cases I'm referring to the browsers as they come out of they box, with no customization of the mime/application mappings.

Upvotes: 1

diclophis
diclophis

Reputation: 2442

Try one of these other mime-types (from here: http://filext.com/file-extension/CSV )

  • text/comma-separated-values
  • text/csv
  • application/csv
  • application/excel
  • application/vnd.ms-excel
  • application/vnd.msexcel

Also, the mime-type might be case sensitive...

Upvotes: 30

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