473,554 Members | 3,223 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

how to prevent automatic conversion of .csv file to .xls

Hi,

I have a web page which generates a CSV file based on some user input. When
this file is downloaded by the user, the file is being automatically
converted to .xls. Any idea how I can prevent this?

My code (snippet) -

StreamWriter sw;
if(File.Exists( filename))
File.Delete(fil ename);
sw = File.CreateText (filename);
string values="\"File Name\",\"Name\" ,\"Description\ ",\"Is Customizable\"" ;
try
{
foreach(DataRow dr in dt.Rows)
{
for(int i=0; i<dt.Columns.Co unt; i++)
values += ",\"" + dr[i].ToString() +"\"";
}
values += ",\"Documen t Type\",\"Catego ry\"";
sw.WriteLine(va lues);
}
catch(Exception ex)
{
//Show error msg
sw.Close();
return;
}
sw.Close();
//Show success message

filename = DMS.Global.site _config.getAttr ibute("base_hre f") +
@"/temporary_files/file_import.csv ";

//hiddenlbl is an asp Label which is invisible when page is loaded
//The following code is for the file download popup
string htmlinput = "<iframe id='downloadFra me' src = '" + filename + "'";
htmlinput += " style='display: none'></iframe>";
hiddenlbl.Visib le = true;
hiddenlbl.Text = htmlinput;

Nov 18 '05 #1
6 3056
On 8/10/2004 2:37 PM, Divya wrote:
Hi,

I have a web page which generates a CSV file based on some user input. When
this file is downloaded by the user, the file is being automatically
converted to .xls. Any idea how I can prevent this?

My code (snippet) -

StreamWriter sw;
if(File.Exists( filename))
File.Delete(fil ename);
sw = File.CreateText (filename);
string values="\"File Name\",\"Name\" ,\"Description\ ",\"Is Customizable\"" ;
try
{
foreach(DataRow dr in dt.Rows)
{
for(int i=0; i<dt.Columns.Co unt; i++)
values += ",\"" + dr[i].ToString() +"\"";
}
values += ",\"Documen t Type\",\"Catego ry\"";
sw.WriteLine(va lues);
}
catch(Exception ex)
{
//Show error msg
sw.Close();
return;
}
sw.Close();
//Show success message

filename = DMS.Global.site _config.getAttr ibute("base_hre f") +
@"/temporary_files/file_import.csv ";

//hiddenlbl is an asp Label which is invisible when page is loaded
//The following code is for the file download popup
string htmlinput = "<iframe id='downloadFra me' src = '" + filename + "'";
htmlinput += " style='display: none'></iframe>";
hiddenlbl.Visib le = true;
hiddenlbl.Text = htmlinput;

I don't know if there's much you can do; by default I believe Excel
grabs CSV files, so it's a client-side issue (the client makes the
request, sees a CSV and in Windows CSVs are opened by Excel). You could
try renaming it to a .txt file instead....

--
Craig Deelsnyder
Microsoft MVP - ASP/ASP.NET
Nov 18 '05 #2
Craig,

I think I did not explain the problem correctly. To demonstrate my problem,
I have created a sample project.....to access it, click on the link below -
http://192.168.1.155/CSVGenerator/csv.aspx

I created the file_import.csv file and included it under this project. But,
when the user tries to download it, .net converts it to file_import.xls . This
is what I am trying to avoid.......
any comments?

-Divya

"Craig Deelsnyder" wrote:
On 8/10/2004 2:37 PM, Divya wrote:
Hi,

I have a web page which generates a CSV file based on some user input. When
this file is downloaded by the user, the file is being automatically
converted to .xls. Any idea how I can prevent this?

My code (snippet) -

StreamWriter sw;
if(File.Exists( filename))
File.Delete(fil ename);
sw = File.CreateText (filename);
string values="\"File Name\",\"Name\" ,\"Description\ ",\"Is Customizable\"" ;
try
{
foreach(DataRow dr in dt.Rows)
{
for(int i=0; i<dt.Columns.Co unt; i++)
values += ",\"" + dr[i].ToString() +"\"";
}
values += ",\"Documen t Type\",\"Catego ry\"";
sw.WriteLine(va lues);
}
catch(Exception ex)
{
//Show error msg
sw.Close();
return;
}
sw.Close();
//Show success message

filename = DMS.Global.site _config.getAttr ibute("base_hre f") +
@"/temporary_files/file_import.csv ";

//hiddenlbl is an asp Label which is invisible when page is loaded
//The following code is for the file download popup
string htmlinput = "<iframe id='downloadFra me' src = '" + filename + "'";
htmlinput += " style='display: none'></iframe>";
hiddenlbl.Visib le = true;
hiddenlbl.Text = htmlinput;

I don't know if there's much you can do; by default I believe Excel
grabs CSV files, so it's a client-side issue (the client makes the
request, sees a CSV and in Windows CSVs are opened by Excel). You could
try renaming it to a .txt file instead....

--
Craig Deelsnyder
Microsoft MVP - ASP/ASP.NET

Nov 18 '05 #3
Divya,

that's an internal ip on your network (192.168.n.n range). In any case, I
think Craig gave you the correct answer - this is a client side issue -
Excel is handling the .csv file type - try renaming the file on the disk to
a .txt file as Craig suggests and see what happens.

Steve

"Divya" <Di***@discussi ons.microsoft.c om> wrote in message
news:11******** *************** ***********@mic rosoft.com...
Craig,

I think I did not explain the problem correctly. To demonstrate my problem, I have created a sample project.....to access it, click on the link below - http://192.168.1.155/CSVGenerator/csv.aspx

I created the file_import.csv file and included it under this project. But, when the user tries to download it, .net converts it to file_import.xls . This is what I am trying to avoid.......
any comments?

-Divya

"Craig Deelsnyder" wrote:
On 8/10/2004 2:37 PM, Divya wrote:
Hi,

I have a web page which generates a CSV file based on some user input. When this file is downloaded by the user, the file is being automatically
converted to .xls. Any idea how I can prevent this?

My code (snippet) -

StreamWriter sw;
if(File.Exists( filename))
File.Delete(fil ename);
sw = File.CreateText (filename);
string values="\"File Name\",\"Name\" ,\"Description\ ",\"Is Customizable\"" ; try
{
foreach(DataRow dr in dt.Rows)
{
for(int i=0; i<dt.Columns.Co unt; i++)
values += ",\"" + dr[i].ToString() +"\"";
}
values += ",\"Documen t Type\",\"Catego ry\"";
sw.WriteLine(va lues);
}
catch(Exception ex)
{
//Show error msg
sw.Close();
return;
}
sw.Close();
//Show success message

filename = DMS.Global.site _config.getAttr ibute("base_hre f") +
@"/temporary_files/file_import.csv ";

//hiddenlbl is an asp Label which is invisible when page is loaded
//The following code is for the file download popup
string htmlinput = "<iframe id='downloadFra me' src = '" + filename + "'"; htmlinput += " style='display: none'></iframe>";
hiddenlbl.Visib le = true;
hiddenlbl.Text = htmlinput;

I don't know if there's much you can do; by default I believe Excel
grabs CSV files, so it's a client-side issue (the client makes the
request, sees a CSV and in Windows CSVs are opened by Excel). You could
try renaming it to a .txt file instead....

--
Craig Deelsnyder
Microsoft MVP - ASP/ASP.NET

Nov 18 '05 #4
Craig,

Try
this......http://192.168.1.155/CSVGenerator/te...ile_import.csv

even though u will try to access a csv file, the download popup will ask u
....... "do u want to save file_import.xls ?" Is there anyway I could preserve
the csv in the download popup?

-Divya

"Divya" wrote:
Craig,

I think I did not explain the problem correctly. To demonstrate my problem,
I have created a sample project.....to access it, click on the link below -
http://192.168.1.155/CSVGenerator/csv.aspx

I created the file_import.csv file and included it under this project. But,
when the user tries to download it, .net converts it to file_import.xls . This
is what I am trying to avoid.......
any comments?

-Divya

"Craig Deelsnyder" wrote:
On 8/10/2004 2:37 PM, Divya wrote:
Hi,

I have a web page which generates a CSV file based on some user input. When
this file is downloaded by the user, the file is being automatically
converted to .xls. Any idea how I can prevent this?

My code (snippet) -

StreamWriter sw;
if(File.Exists( filename))
File.Delete(fil ename);
sw = File.CreateText (filename);
string values="\"File Name\",\"Name\" ,\"Description\ ",\"Is Customizable\"" ;
try
{
foreach(DataRow dr in dt.Rows)
{
for(int i=0; i<dt.Columns.Co unt; i++)
values += ",\"" + dr[i].ToString() +"\"";
}
values += ",\"Documen t Type\",\"Catego ry\"";
sw.WriteLine(va lues);
}
catch(Exception ex)
{
//Show error msg
sw.Close();
return;
}
sw.Close();
//Show success message

filename = DMS.Global.site _config.getAttr ibute("base_hre f") +
@"/temporary_files/file_import.csv ";

//hiddenlbl is an asp Label which is invisible when page is loaded
//The following code is for the file download popup
string htmlinput = "<iframe id='downloadFra me' src = '" + filename + "'";
htmlinput += " style='display: none'></iframe>";
hiddenlbl.Visib le = true;
hiddenlbl.Text = htmlinput;

I don't know if there's much you can do; by default I believe Excel
grabs CSV files, so it's a client-side issue (the client makes the
request, sees a CSV and in Windows CSVs are opened by Excel). You could
try renaming it to a .txt file instead....

--
Craig Deelsnyder
Microsoft MVP - ASP/ASP.NET

Nov 18 '05 #5
On Tue, 10 Aug 2004 22:38:32 +0100, Steve Willcock
<st***@N-O-S-P-A-Mwillcockconsul ting.com> wrote:
Divya,

that's an internal ip on your network (192.168.n.n range). In any case, I
think Craig gave you the correct answer - this is a client side issue -
Excel is handling the .csv file type - try renaming the file on the disk
to
a .txt file as Craig suggests and see what happens.

Steve

"Divya" <Di***@discussi ons.microsoft.c om> wrote in message
news:11******** *************** ***********@mic rosoft.com...
Craig,

I think I did not explain the problem correctly. To demonstrate my

problem,
I have created a sample project.....to access it, click on the link

below -
http://192.168.1.155/CSVGenerator/csv.aspx

I created the file_import.csv file and included it under this project.

But,
when the user tries to download it, .net converts it to file_import.xls .

This
is what I am trying to avoid.......
any comments?

-Divya

"Craig Deelsnyder" wrote:
> On 8/10/2004 2:37 PM, Divya wrote:
> > Hi,
> >
> > I have a web page which generates a CSV file based on some user

input.

When
> > this file is downloaded by the user, the file is being automatically
> > converted to .xls. Any idea how I can prevent this?
> >
> > My code (snippet) -
> >
> > StreamWriter sw;
> > if(File.Exists( filename))
> > File.Delete(fil ename);
> > sw = File.CreateText (filename);
> > string values="\"File Name\",\"Name\" ,\"Description\ ",\"Is Customizable\"" ; > > try
> > {
> > foreach(DataRow dr in dt.Rows)
> > {
> > for(int i=0; i<dt.Columns.Co unt; i++)
> > values += ",\"" + dr[i].ToString() +"\"";
> > }
> > values += ",\"Documen t Type\",\"Catego ry\"";
> > sw.WriteLine(va lues);
> > }
> > catch(Exception ex)
> > {
> > //Show error msg
> > sw.Close();
> > return;
> > }
> > sw.Close();
> > //Show success message
> >
> > filename = DMS.Global.site _config.getAttr ibute("base_hre f") +
> > @"/temporary_files/file_import.csv ";
> >
> > //hiddenlbl is an asp Label which is invisible when page is loaded
> > //The following code is for the file download popup
> > string htmlinput = "<iframe id='downloadFra me' src = '" + filename + "'"; > > htmlinput += " style='display: none'></iframe>";
> > hiddenlbl.Visib le = true;
> > hiddenlbl.Text = htmlinput;
> >
> I don't know if there's much you can do; by default I believe Excel
> grabs CSV files, so it's a client-side issue (the client makes the
> request, sees a CSV and in Windows CSVs are opened by Excel). You

could
> try renaming it to a .txt file instead....
>
> --
> Craig Deelsnyder
> Microsoft MVP - ASP/ASP.NET
>



if you're getting a download dialog, either the server is sending the
content as type octet-stream (which is not the case here), or the user's
browser does not have a default action for the type of file you have
loaded in the document window. meaning either Excel (or another app that
can handle csv files) is not loaded on the machine, or a browser like
firefox, that prompts for unknown MIME types.

i'm not sure what you mean by converting to .xls, is the popup/download
dialog saying that as the default name? I assumed Excel was trying to
open it; AFAIK from the server side it either gets defaulted to the same
name as the page containing the iframe, or the name of the src document of
the iframe itself. Which is why i don't see where .xls is coming from...

if you are trying to force a download, I might recommend this approach
instead or as another option to try:

http://www.ondotnet.com/pub/a/dotnet...04/01/asp.html

Create a page that utilizes the download example there and set that as the
source of the iframe. Another method to try. But this approach shows how
to set default filenames, although if I remember right, this
content-disposition header may be 'going out of style' with browsers in
the future....

--
Craig Deelsnyder
Microsoft MVP - ASP/ASP.NET
Nov 18 '05 #6
I think you explained the problem fine. I think maybe you didn't understand
Craig's answer. Here's the thing. On your computer, let's say you
double-click a file with a .txt extension. It will open in NotePad. It
doesn't "become a NotePad file." It is opened in NotePad because the
Operating System recognizes the file extension, and opens the file in the
designated program for that Operating System. When Excel opens a .csv file,
it doesn't convert it to an Excel file format. It merely creates an Excel
document in memory, and uses that to parse and display the .csv file. You
would have to save it as "file_import.xl s" in order to convert it.

--
HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
Big things are made up
of lots of little things.

"Divya" <Di***@discussi ons.microsoft.c om> wrote in message
news:11******** *************** ***********@mic rosoft.com...
Craig,

I think I did not explain the problem correctly. To demonstrate my problem, I have created a sample project.....to access it, click on the link below - http://192.168.1.155/CSVGenerator/csv.aspx

I created the file_import.csv file and included it under this project. But, when the user tries to download it, .net converts it to file_import.xls . This is what I am trying to avoid.......
any comments?

-Divya

"Craig Deelsnyder" wrote:
On 8/10/2004 2:37 PM, Divya wrote:
Hi,

I have a web page which generates a CSV file based on some user input. When this file is downloaded by the user, the file is being automatically
converted to .xls. Any idea how I can prevent this?

My code (snippet) -

StreamWriter sw;
if(File.Exists( filename))
File.Delete(fil ename);
sw = File.CreateText (filename);
string values="\"File Name\",\"Name\" ,\"Description\ ",\"Is Customizable\"" ; try
{
foreach(DataRow dr in dt.Rows)
{
for(int i=0; i<dt.Columns.Co unt; i++)
values += ",\"" + dr[i].ToString() +"\"";
}
values += ",\"Documen t Type\",\"Catego ry\"";
sw.WriteLine(va lues);
}
catch(Exception ex)
{
//Show error msg
sw.Close();
return;
}
sw.Close();
//Show success message

filename = DMS.Global.site _config.getAttr ibute("base_hre f") +
@"/temporary_files/file_import.csv ";

//hiddenlbl is an asp Label which is invisible when page is loaded
//The following code is for the file download popup
string htmlinput = "<iframe id='downloadFra me' src = '" + filename + "'"; htmlinput += " style='display: none'></iframe>";
hiddenlbl.Visib le = true;
hiddenlbl.Text = htmlinput;

I don't know if there's much you can do; by default I believe Excel
grabs CSV files, so it's a client-side issue (the client makes the
request, sees a CSV and in Windows CSVs are opened by Excel). You could
try renaming it to a .txt file instead....

--
Craig Deelsnyder
Microsoft MVP - ASP/ASP.NET

Nov 18 '05 #7

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

0
1446
by: Raphael A. Bauer | last post by:
Hi, I am just using this Java code: ---------- //Read it => automatically converts it to UTF-8 DocumentBuilderFactory factory = DocumentBuilderFactory .newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); document = builder.parse(new File(fileName));
7
1818
by: bartek | last post by:
Please consider the following scenario below (sketch of). There are two templates defined: A and B, both with mutual conversion operators defined. Also, there's a free function template 'do_something' with the following signature: template <class T> inline void do_something(B<T> const& arg); Now, given an object of type, say, A<int>...
4
6955
by: jon morgan | last post by:
Hello, In an MDI application how can I prevent the CLR automatically merging a child windows' menu with that of the parent MDI form ? Thanks for any help Jon
18
16375
by: jmd | last post by:
Hello, I posted the following in the C# forum but without one answer. But perhaps now in vb.net someone has some guidelines ! This is my question : I want to write a vb.net program that does completely automatically what, until now, I do manually, witch is describe below : 1. I launch IE (6)
3
1887
by: Francesc | last post by:
Hi, I'm new at this newsgroup and I want do ask some questions and opinions about this subject. I'm developing an application focused in a very specific task: clean and labelling text documents with user-defined structural tags (title, cite, date, paragraph, itemList, ...). It makes the typical pre-processing tasks needed for computational...
1
1629
by: ABC | last post by:
Is there any best solution automatic delete file within the special time? My web application can generate many pdf files for users. Because there are many users, I need to control the total pdf files on the servers. I need to set it automatic remove after 10 mins of file created. Is any good ideas?
2
2109
by: ray | last post by:
I have a client that doesn't want Access to automatically repair into a backup file if it crashes (and it crashes only on very rare occasions). My (sketchy) understanding is that this is a Windows function that can't be stopped by using runtime switches, advanced options or other hi-falutin' database properties. Ami I correct that the...
2
1500
by: Partha Mandayam | last post by:
Is there a tool for asp.net 1.1 to asp.net 2.0 automatic conversion?
3
1859
by: Markus Dehmann | last post by:
I think this is a question about automatic type conversion, but I didn't find the answer after googling for these words ... I have a class called Value (source see below) which can hold an int or a string: Value i(23); Value s("blah"); Now I want an implicit conversion that automatically returns the correct type, even in a context like...
0
7580
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main...
0
7503
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language...
0
7781
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. ...
0
8017
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that...
0
7869
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the...
1
5421
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes...
0
3531
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
2003
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
0
817
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.