i have a view where i put the id of the event then i can download all the images for that event.....
here's my code
[HttpPost]
public ActionResult Index(FormCollection All)
{
try
{
var context = new MyEntities();
var Im = (from p in context.Event_Photos
where p.Event_Id == 1332
select p.Event_Photo);
Response.Clear();
var downloadFileName = string.Format("YourDownload-{0}.zip", DateTime.Now.ToString("yyyy-MM-dd-HH_mm_ss"));
Response.ContentType = "application/zip";
Response.AddHeader("content-disposition", "filename=" + downloadFileName);
using (ZipFile zipFile = new ZipFile())
{
zipFile.AddDirectoryByName("Files");
foreach (var userPicture in Im)
{
zipFile.AddFile(Server.MapPath(#"\") + userPicture.Remove(0, 1), "Files");
}
zipFile.Save(Response.OutputStream);
//Response.Close();
}
return View();
}
catch (Exception ex)
{
return View();
}
}
The problem is that each time i get html page to download so instead of downloading "Album.zip" i get "Album.html" any ideas???
In MVC, rather than returning a view, if you want to return a file, you can return this as an ActionResult by doing:
return File(zipFile.GetBytes(), "application/zip", downloadFileName);
// OR
return File(zipFile.GetStream(), "application/zip", downloadFileName);
Don't mess about with manually writing to the output stream if you're using MVC.
I'm not sure if you can get the bytes or the stream from the ZipFile class though. Alternatively, you might want it to write it's output to a MemoryStream and then return that:
var cd = new System.Net.Mime.ContentDisposition {
FileName = downloadFileName,
Inline = false,
};
Response.AppendHeader("Content-Disposition", cd.ToString());
var memStream = new MemoryStream();
zipFile.Save(memStream);
memStream.Position = 0; // Else it will try to read starting at the end
return File(memStream, "application/zip");
And by using this, you can remove all lines in which you are doing anything with the Response. No need to Clear or AddHeader.
Related
After downloaded a file from Server (pdf, jpg,..) successfully, I couldn't open that file in my computer.
It said "It looks like we don't support this file format". Files are stored and readable on Server.
Wonder if there is something missing in my Download Function:
[HttpGet]
public ActionResult Download(Guid? attachmentId)
{
var visitAttachment = _visitAttachmentService.FindOne(x => x.Id == attachmentId);
try
{
var serverPath = Server.MapPath(visitAttachment.Path);
byte[] fileBytes = System.IO.File.ReadAllBytes(serverPath);
return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet, visitAttachment.AttachmentName);
}
catch
{
return File(Encoding.UTF8.GetBytes(""), System.Net.Mime.MediaTypeNames.Application.Octet, visitAttachment.AttachmentName);
}
}
It seems like file not downloaded properly, try this, may it help, good luck
FileDownload(yourfilepath ,yourfilenamewithFormat)
{
string filename = yourfilenamewithFormat;
byte[] file_Bytes = System.IO.File.ReadAllBytes(yourfilepath);
return File(file_Bytes, System.Net.Mime.MediaTypeNames.Application.Octet, filename);
}
My opinion, is that you can be missing the file extension. If that is the case you can get it by the using Path.GetExtension(serverPath)
Edited
Try to use FileResult instead of ActionResult
[HttpGet]
public FileResult Download(Guid? attachmentId)
{
var visitAttachment = _visitAttachmentService.FindOne(x => x.Id == attachmentId);
try
{
var serverPath = Server.MapPath(visitAttachment.Path);
byte[] fileBytes = System.IO.File.ReadAllBytes(serverPath);
return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet, visitAttachment.AttachmentName);
}
catch
{
return File(Encoding.UTF8.GetBytes(""), System.Net.Mime.MediaTypeNames.Application.Octet, visitAttachment.AttachmentName);
}
}
I'm trying to export a list, but when i open the file download it just shows a bunch of characteres that don't make sense (kinda looks like machine language). I've looked at some codes here and all of them are similar to mine, what am I missing?
Here's my code:
The method I call:
[HttpGet]
public HttpResponseMessage Get()
{
HttpResponseMessage response;
response = Request.CreateResponse(HttpStatusCode.OK);
MediaTypeHeaderValue mediaType = new MediaTypeHeaderValue("application/ms-excel");
response.Content = new StreamContent(GetExcelSheet());
response.Content = response.Content;
response.Content.Headers.ContentType = mediaType;
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
response.Content.Headers.ContentDisposition.FileName = "PivotGrid_Orders.xls";
return response;
}
The method that format cells:
public MemoryStream GetExcelSheet()
{
using (var package = new ExcelPackage())
{
var worksheet = package.Workbook.Worksheets.Add("Orders");
//worksheet.Cells["A1"].LoadFromCollection()
worksheet.Cells["A1"].LoadFromCollection(Orders(), false);
package.Save();
var stream = new MemoryStream(package.GetAsByteArray()); //capacidade
return stream;
}
}
The list i've created to test:
public List<ExListModel> Orders()
{
List<ExListModel> lst = new List<ExListModel>();
orders.Add(new ExListModel{ Nome = "Developer"});
return lst;
}
As I didn't know EPPlus, I googled it, and its Github page states it produces Open XML excel files (.xlsx). You produce the file with an extension and mimetype of the old binary excel filetype. Change the contenttype to application/vnd.openxmlformats-officedocument.spreadsheetml.sheet and the filename extension to xlsx.
I want to create and return a CSV file from a controller but I have several errors in IE8 with Chrome frame, because the controller returns a file and again calls post two times.
In my view I have a simple submit button:
Controller:
public ActionResult File()
{
string billcsv = "account_ref,line1,line2,line3";
var data = Encoding.UTF8.GetBytes(billcsv);
string filename = "billfor.csv";
var cd = new System.Net.Mime.ContentDisposition();
cd.FileName = "filename.csv";
//Response.AddHeader("Content-Disposition", cd.ToString());
Response.AddHeader("Content-Disposition", "attachment;filename=filename.csv");
return File(data, "text/csv", filename);
}
Thanks.
Try this:
public FileResult File()
{
string billcsv = "account_ref,line1,line2,line3";
var data = Encoding.UTF8.GetBytes(billcsv);
string filename = "billfor.csv";
File(data, System.Net.Mime.MediaTypeNames.Application.Octet, filename);
}
this is my controller class:-
public class PlantHeadController : Controller
{
private WOMSEntities2 db = new WOMSEntities2();
//
// GET: /PlantHead/
Document doc = new Document();
static String[] tt=new String[20];
public ActionResult Index()
{
ViewBag.productCode = new SelectList(db.Product, "ID","code");
return View();
}
public void Convert()
{
PdfWriter.GetInstance(doc, new
FileStream((Request.PhysicalApplicationPath + "\\Receipt3.pdf"),
FileMode.Create));
doc.Open();
PdfPTable table = new PdfPTable(2);
doc.AddCreationDate();
PdfPCell cell = new PdfPCell(new Phrase("Receipt"));
cell.Colspan = 3;
cell.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right
table.AddCell(cell);
table.AddCell("ahym");
table.AddCell("ram";
table.AddCell("good");
table.AddCell("morning");
String rawGroup = "";
foreach (String lll in raw)
rawGroup = rawGroup + lll+" ";
table.AddCell("" + rawGroup);
doc.Add(table);
doc.Close();
Response.Redirect("~/Receipt3.pdf");
}
}
whenever i press submit button to make pdf file then this error window is opened:-
means pdf is not generated successfully. in some cases old pdf is shown. please suggest me what should i do?
Everything looks good for the most part above (except a missing parenthesis on table.AddCell("ram"; which I assume is just a typo and you could also do with some using statements). I don't know why you would get an error but the reason that you're getting the same PDF is almost definitely because of browser caching. You could append a random querystring to the file but I'd recommend instead skipping the file completely and writing the binary stream directly. This way you can control the caching and you don't have to work about browser redirection. The below code should work for you (its targeting 5.1.1.0 depending on your version you may or may not be able to use some of the using statements).
EDIT
I donwgraded my code to not use the IDisposable interfaces found in newer versions, this should work for you now. (I don't have access to a C# compiler so I didn't test it so hopefully this works.)
using (MemoryStream ms = new MemoryStream())
{
Document doc = new Document());
PdfWriter writer = PdfWriter.GetInstance(doc, ms));
doc.Open();
doc.AddCreationDate();
PdfPTable table = new PdfPTable(2);
PdfPCell cell = new PdfPCell(new Phrase("Receipt"));
cell.Colspan = 3;
cell.HorizontalAlignment = 1; //0=Left, 1=Centre, 2=Right
table.AddCell(cell);
table.AddCell("ahym");
table.AddCell("ram");
table.AddCell("good");
table.AddCell("morning");
String rawGroup = "";
foreach (String lll in raw)
{
rawGroup = rawGroup + lll + " ";
}
table.AddCell("" + rawGroup);
doc.Add(table);
doc.Close();
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;filename=Receipt3.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.BinaryWrite(ms.ToArray());
System.Web.HttpContext.Current.ApplicationInstance.CompleteRequest();
}
I'm trying to serve a txt file made from the database using an action. The action is the following:
public ActionResult ATxt()
{
var articulos = _articulosService.ObteTotsArticles();
return File(CatalegATxt.ATxt(articulos), "text/plain");
}
and the CatalegATxt class is:
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using WebDibaelsaMVC.DTOs.Busqueda;
namespace WebDibaelsaMVC.TxtLib
{
public static class CatalegATxt
{
public static Stream ATxt(IEnumerable<ArticuloBusquedaDTO> articles)
{
var stream = new MemoryStream();
var streamWriter = new StreamWriter(stream, Encoding.UTF8);
foreach (ArticuloBusquedaDTO article in articles)
{
streamWriter.WriteLine(article.ToStringFix());
}
stream.Seek(0, SeekOrigin.Begin);
return stream;
}
public static string ToStringFix(this ArticuloBusquedaDTO article)
{
string result = "";
result += article.CodigoArticulo.PadRight(10, ' ').Substring(0, 10);
result += article.EAN.Trim().PadLeft(13, '0').Substring(0, 13);
result += article.NombreArticulo.PadRight(100, ' ').Substring(0, 100);
result += article.Marca.PadRight(100, ' ').Substring(0, 100);
result += article.Familia.PadRight(50, ' ').Substring(0, 50);
result += article.PrecioCesion.ToStringFix();
result += article.PVP.ToStringFix();
return result;
}
private static string ToStringFix(this double numero)
{
var num = (int)Math.Round(numero * 100, 0);
string result = num.ToString().PadLeft(10, '0');
return result;
}
}
}
it just writes the file lines based on the stuff I got from the database. But when I look at the file it looks truncated. The file is about 8Mb. I also tried converting to byte[] before returning from ATxt with the same result.
Any idea?
Thanks,
Carles
Update: I also tried to serve XML from the same content and it also gets truncated. It doesn't get truncated on the data (I thought it might have been an EOF character in it) but it truncates in the middle of a label...
I was having the exact same problem. The text file would always be returned as truncated.
It crossed my mind that it might be a "flushing" problem, and indeed it was. The writer's buffer hasn't been flushed at the end of the operation - since there's no using block, or the Close() call - which would flush automatically.
You need to call:
streamWriter.Flush();
before MVC takes over the stream.
Here's how your method should look like:
public static Stream ATxt(IEnumerable<ArticuloBusquedaDTO> articles)
{
var stream = new MemoryStream();
var streamWriter = new StreamWriter(stream, Encoding.UTF8);
foreach (ArticuloBusquedaDTO article in articles)
{
streamWriter.WriteLine(article.ToStringFix());
}
// Flush the stream writer buffer
streamWriter.Flush();
stream.Seek(0, SeekOrigin.Begin);
return stream;
}
Why are you using an ActionResult?
ASP.NET MVC 1 has a FileStreamResult for just what you are doing. It expects a Stream object, and returns it.
public FileStreamResult Test()
{
return new FileStreamResult(myMemoryStream, "text/plain");
}
Should work fine for what you want to do. No need to do any conversions.
In your case, just change your method to this:
public FileStreamResult ATxt()
{
var articulos = _articulosService.ObteTotsArticles();
return new FileStreamResult(CatalegATxt.ATxt(articulos), "text/plain");
}
You probably want to close the MemoryStream. It could be getting truncated because it expects more data still. Or to make things even simpler, try something like this:
public static byte[] ATxt(IEnumerable<ArticuloBusquedaDTO> articles)
{
using(var stream = new MemoryStream())
{
var streamWriter = new StreamWriter(stream, Encoding.UTF8);
foreach (ArticuloBusquedaDTO article in articles)
{
streamWriter.WriteLine(article.ToStringFix());
}
return stream.ToArray();
}
}