Edit text file?

**Herfried K. Wagner [MVP]** · Nov 21 '05, 09:55 AM

Re: Edit text file?

"Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=blue]
>I have a text file which stores user input. Later if user edited the
>input
> data from a input form. How can I update the input text file?[/color]

For small text files, the simplest solution is to rewrite the whole file.
This doesn't mean deleting the file and then creating a new one, but it
means setting the file's length to 0 using 'FileStream.Set Length' and then
write the data to the file using 'System.IO.Stre amWriter'.
[color=blue]
> If update the text file too often, would it cause problem?[/color]

This depends on the size of the file and the intervalls between the updates.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

**Nina** · Nov 21 '05, 09:59 AM

Re: Edit text file?

Thank you so much for your help. Will 5 to 10 pages's text file be
considered as a small text file?

Nina

"Herfried K. Wagner [MVP]" wrote:
[color=blue]
> "Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=green]
> >I have a text file which stores user input. Later if user edited the
> >input
> > data from a input form. How can I update the input text file?[/color]
>
> For small text files, the simplest solution is to rewrite the whole file.
> This doesn't mean deleting the file and then creating a new one, but it
> means setting the file's length to 0 using 'FileStream.Set Length' and then
> write the data to the file using 'System.IO.Stre amWriter'.
>[color=green]
> > If update the text file too often, would it cause problem?[/color]
>
> This depends on the size of the file and the intervalls between the updates.
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
>
>
>[/color]

**Herfried K. Wagner [MVP]** · Nov 21 '05, 09:59 AM

Re: Edit text file?

"Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=blue]
> Will 5 to 10 pages's text file be
> considered as a small text file?[/color]

I consider everything < 10 KB a "small file", but that's only my personal
opinion.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

**Nina** · Nov 21 '05, 10:01 AM

Re: Edit text file?

Since the text file that I'm working on is about 50 KB, I cannot use the way
you suggested previously. Is there any way that fits my application?

Thanks again.

Nina

"Herfried K. Wagner [MVP]" wrote:
[color=blue]
> "Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=green]
> > Will 5 to 10 pages's text file be
> > considered as a small text file?[/color]
>
> I consider everything < 10 KB a "small file", but that's only my personal
> opinion.
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
>
>[/color]

**Jim Edgar** · Nov 21 '05, 10:01 AM

Re: Edit text file?

"Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message
news:OWyfU%23$8 EHA.1300@TK2MSF TNGP14.phx.gbl. ..[color=blue]
> "Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=green]
> > Will 5 to 10 pages's text file be
> > considered as a small text file?[/color]
>
> I consider everything < 10 KB a "small file", but that's only my personal
> opinion.
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
>[/color]

Herfried --

If the data stored in her file is structured in the

keyname=value

format does VB.Net have a replacement for the old
WritePrivatePro fileString and GetPrivateProfi leString
API calls? I'm new to .Net and many of my old VB6
programs use these functions to store and update user data.
As I convert the old projects to .Net I'd like to use the
framework if possible.

Jim Edgar

**Herfried K. Wagner [MVP]** · Nov 21 '05, 10:01 AM

Re: Edit text file?

"Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=blue]
> Since the text file that I'm working on is about 50 KB, I cannot use the
> way
> you suggested previously. Is there any way that fits my application?[/color]

What data are you storing?
How often do you store it?
How often do you read the data?
....

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

**Nina** · Nov 21 '05, 10:03 AM

Re: Edit text file?

> What data are you storing?
Below is a sample text file:

Subcatchment Name=sub
ID=1
Description=gri d
Area=100
Length=800
Slop=4
%Impervious=10
N-Impervious=0.01
N-Pervious=0.05
DStore-Impervious=1.5
Dstore-Pervious=4.5
Model=Horton
End

Statistics
Location=Chicag o
Volume=18.86
Duration=7.73
Time=103.1
Annual Number of Events=57.2
End

sub Infil Data
Max. Infil=25.4
Min. Infil=0.36
Decay Constant=4.14
Recovery Constant=0.005
End
[color=blue]
> How often do you store it?
> How often do you read the data?[/color]
For these two questions, it depends on how often user changes those inputs.
It is possible that user edit those valumes frequently. Well, what I'm trying
to do is to read the text file and put it into a global arraylist when user
opens the project. While user working with the project, I just simply update
the arraylist. When user close the project, then I writ e the arraylist back
to the text file. Do you think this is a good way to handle it?

Thanks again.

Nina

"Herfried K. Wagner [MVP]" wrote:
[color=blue]
> "Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=green]
> > Since the text file that I'm working on is about 50 KB, I cannot use the
> > way
> > you suggested previously. Is there any way that fits my application?[/color]
>
> What data are you storing?
> How often do you store it?
> How often do you read the data?
> ....
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
>[/color]

**Herfried K. Wagner [MVP]** · Nov 21 '05, 10:05 AM

Re: Edit text file?

"Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=blue][color=green]
>> What data are you storing?[/color]
> Below is a sample text file:
>
> Subcatchment Name=sub
> ID=1
> Description=gri d
> Area=100
> Length=800
> Slop=4
> %Impervious=10
> N-Impervious=0.01
> N-Pervious=0.05
> DStore-Impervious=1.5
> Dstore-Pervious=4.5
> Model=Horton
> End
>
> Statistics
> Location=Chicag o
> Volume=18.86
> Duration=7.73
> Time=103.1
> Annual Number of Events=57.2
> End
>
> sub Infil Data
> Max. Infil=25.4
> Min. Infil=0.36
> Decay Constant=4.14
> Recovery Constant=0.005
> End
>[color=green]
>> How often do you store it?
>> How often do you read the data?[/color]
> For these two questions, it depends on how often user changes those
> inputs.
> It is possible that user edit those valumes frequently. Well, what I'm
> trying
> to do is to read the text file and put it into a global arraylist when
> user
> opens the project. While user working with the project, I just simply
> update
> the arraylist. When user close the project, then I writ e the arraylist
> back
> to the text file. Do you think this is a good way to handle it?[/color]

I think that's a good way!

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

**Herfried K. Wagner [MVP]** · Nov 21 '05, 10:06 AM

Re: Edit text file?

"Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=blue][color=green]
>> What data are you storing?[/color]
> Below is a sample text file:
>
> Subcatchment Name=sub
> ID=1
> Description=gri d
> Area=100
> Length=800
> Slop=4
> %Impervious=10
> N-Impervious=0.01
> N-Pervious=0.05
> DStore-Impervious=1.5
> Dstore-Pervious=4.5
> Model=Horton
> End
>
> Statistics
> Location=Chicag o
> Volume=18.86
> Duration=7.73
> Time=103.1
> Annual Number of Events=57.2
> End
>
> sub Infil Data
> Max. Infil=25.4
> Min. Infil=0.36
> Decay Constant=4.14
> Recovery Constant=0.005
> End
>[color=green]
>> How often do you store it?
>> How often do you read the data?[/color]
> For these two questions, it depends on how often user changes those
> inputs.
> It is possible that user edit those valumes frequently. Well, what I'm
> trying
> to do is to read the text file and put it into a global arraylist when
> user
> opens the project. While user working with the project, I just simply
> update
> the arraylist. When user close the project, then I writ e the arraylist
> back
> to the text file. Do you think this is a good way to handle it?[/color]

I think that's a good way!

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

**Nina** · Nov 21 '05, 10:07 AM

Re: Edit text file?

Thanks.

"Herfried K. Wagner [MVP]" wrote:
[color=blue]
> "Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=green][color=darkred]
> >> What data are you storing?[/color]
> > Below is a sample text file:
> >
> > Subcatchment Name=sub
> > ID=1
> > Description=gri d
> > Area=100
> > Length=800
> > Slop=4
> > %Impervious=10
> > N-Impervious=0.01
> > N-Pervious=0.05
> > DStore-Impervious=1.5
> > Dstore-Pervious=4.5
> > Model=Horton
> > End
> >
> > Statistics
> > Location=Chicag o
> > Volume=18.86
> > Duration=7.73
> > Time=103.1
> > Annual Number of Events=57.2
> > End
> >
> > sub Infil Data
> > Max. Infil=25.4
> > Min. Infil=0.36
> > Decay Constant=4.14
> > Recovery Constant=0.005
> > End
> >[color=darkred]
> >> How often do you store it?
> >> How often do you read the data?[/color]
> > For these two questions, it depends on how often user changes those
> > inputs.
> > It is possible that user edit those valumes frequently. Well, what I'm
> > trying
> > to do is to read the text file and put it into a global arraylist when
> > user
> > opens the project. While user working with the project, I just simply
> > update
> > the arraylist. When user close the project, then I writ e the arraylist
> > back
> > to the text file. Do you think this is a good way to handle it?[/color]
>
>
> I think that's a good way!
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
>
>[/color]

**Nina** · Nov 21 '05, 10:07 AM

Re: Edit text file?

Thanks.

"Herfried K. Wagner [MVP]" wrote:
[color=blue]
> "Nina" <Nina@discussio ns.microsoft.co m> schrieb:[color=green][color=darkred]
> >> What data are you storing?[/color]
> > Below is a sample text file:
> >
> > Subcatchment Name=sub
> > ID=1
> > Description=gri d
> > Area=100
> > Length=800
> > Slop=4
> > %Impervious=10
> > N-Impervious=0.01
> > N-Pervious=0.05
> > DStore-Impervious=1.5
> > Dstore-Pervious=4.5
> > Model=Horton
> > End
> >
> > Statistics
> > Location=Chicag o
> > Volume=18.86
> > Duration=7.73
> > Time=103.1
> > Annual Number of Events=57.2
> > End
> >
> > sub Infil Data
> > Max. Infil=25.4
> > Min. Infil=0.36
> > Decay Constant=4.14
> > Recovery Constant=0.005
> > End
> >[color=darkred]
> >> How often do you store it?
> >> How often do you read the data?[/color]
> > For these two questions, it depends on how often user changes those
> > inputs.
> > It is possible that user edit those valumes frequently. Well, what I'm
> > trying
> > to do is to read the text file and put it into a global arraylist when
> > user
> > opens the project. While user working with the project, I just simply
> > update
> > the arraylist. When user close the project, then I writ e the arraylist
> > back
> > to the text file. Do you think this is a good way to handle it?[/color]
>
>
> I think that's a good way!
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
>
>[/color]

Edit text file?

Edit text file?

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