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');
Use text/csv as the content type.
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.
Try one of these other mime-types (from here: http://filext.com/file-extension/CSV )
Also, the mime-type might be case sensitive...
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=$filename.csv");
Use text/csv as the content type.
For C# MVC 4.5 you need to do like this:
Response.Clear();
Response.ContentType = "application/CSV";
Response.AddHeader("content-disposition", "attachment; filename=\"" + fileName + ".csv\"");
Response.Write(dataNeedToPrint);
Response.End();
return new EmptyResult(); //this line is important else it will not work.
Over the years I've been honing a perfect set of headers for this that work brilliantly in all browsers that I know of
// these headers avoid IE problems when using https:
// see http://support.microsoft.com/kb/812935
header("Cache-Control: must-revalidate");
header("Pragma: must-revalidate");
header("Content-type: application/vnd.ms-excel");
header("Content-disposition: attachment; filename=$filename.csv");
Just Use like that
Response.Clear();
Response.ContentType = "application/CSV";
Response.AddHeader("content-disposition", "attachment; filename=\"" + filename + ".csv\"");
Response.Write(t.ToString());
Response.End();
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.
Just Use like that
Response.Clear();
Response.ContentType = "application/CSV";
Response.AddHeader("content-disposition", "attachment; filename=\"" + filename + ".csv\"");
Response.Write(t.ToString());
Response.End();
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.
Use text/csv as the content type.
Try one of these other mime-types (from here: http://filext.com/file-extension/CSV )
Also, the mime-type might be case sensitive...
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');
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");
}
Try one of these other mime-types (from here: http://filext.com/file-extension/CSV )
Also, the mime-type might be case sensitive...
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.
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");
}
MIME type of the CSV is text/csv according to RFC 4180.
Use text/csv as the content type.
MIME type of the CSV is text/csv according to RFC 4180.
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.
Source: Stackoverflow.com