ASP.NET-MVC – ASP.NET MVC for service TXT is truncated

public ActionResult ATxt()< br />{
 var articulos = _articulosService.ObteTotsArticles();
 return File(CatalegATxt.ATxt(articulos), "text/plain");
}

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 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);< br /> 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;
 }
 }
}

streamWriter.Flush( );

public static Stream ATxt (IEnumerable 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;
}

I am trying to use the operation to provide a txt file created by the database. The action is as follows:

public ActionResult ATxt()
{
 var articulos = _articulosService.ObteTotsArticles();
 return File(CatalegATxt.ATxt(articulos), "text/plain" );
}

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 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);< br /> 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 only writes the file line based on what I get from the database. But when I view the file, it appears to be truncated. The file is approximately It is 8Mb. I also tried to convert to byte[] before returning from ATxt, the result is the same.

Any ideas?

Thanks,

Puyol

Update: I also tried to provide XML from the same content, and it was also truncated. It will not be truncated data ( I thought it might be an EOF character), but it was truncated in the middle of the tag…

I had the exact same problem. The text file will always be Truncated return.

It suddenly occurred to me that it might be a “flushing” problem, which is indeed the case. The buffer of the writer is not flushed at the end of the operation-because there is no block or Close( ) Call-it will refresh automatically.

You need to call:

streamWriter.Flush();

take over in MVC Before streaming.

This is what your method should look like:

public static Stream ATxt(IEnumerable 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;
}

Hope this helps!

Miroslav