VC++.NET 2003 - halp - string

[man]

Hello,
At first I have to warn you - I'm a newbie so don't shout me down and don't
beat me :).

I have a few problems concerning programming using VC++ .NET Std 2003
(particularly Windows Forms):
1) I do not know how to take text fram a text file and paste it into a
textBox. I can do it like that:
ifstream in("teksttt.txt ");

ofstream out("teksttt.tx t");

string linia;

while(getline(i n,linia))

asa += linia + "\n";


but then I can't paste it into textBox:
textBox1->Text = in;

It shows a problem/error:
"error C2664: 'void System::Windows ::Forms::TextBo x::set_Text(Sys tem::
String__gc*)' : cannot convert parameter 1 from 'std::ifstrem' to
'System::String __gc*' "

How to convert 'string' into other one to make possible pasting it into a
textBox?
What type should I use?

2) I have to paste the text like this one:
"There are n men and m women.":
"There are " + n.ToString + " men and " + m.ToString " women."
Am i right?


Thanks in advance...


man

[Serge Paccalin]

Re: VC++.NET 2003 - halp - string

Le samedi 25 juin 2005 à 13:28:16, man a écrit dans comp.lang.c++ :
[color=blue]
> Hello,
> At first I have to warn you - I'm a newbie so don't shout me down and don't
> beat me :).[/color]

You're spoiling all the fun of it...
[color=blue]
> I have a few problems concerning programming using VC++ .NET Std 2003
> (particularly Windows Forms):
> 1) I do not know how to take text fram a text file and paste it into a
> textBox. I can do it like that:
> ifstream in("teksttt.txt ");
>
> ofstream out("teksttt.tx t");
>
> string linia;
>
> while(getline(i n,linia))
>
> asa += linia + "\n";[/color]

I assume 'asa' is a string too, right?
[color=blue]
> but then I can't paste it into textBox:
> textBox1->Text = in;[/color]

Shouldn't you put the *string* in your textbox, rather than the
*stream*? Something like:

textBox1->Text = asa;

or:

textBox1->Text = asa.c_str();
[color=blue]
> It shows a problem/error:
> "error C2664: 'void System::Windows ::Forms::TextBo x::set_Text(Sys tem::
> String__gc*)' : cannot convert parameter 1 from 'std::ifstrem' to
> 'System::String __gc*' "[/color]

--
___________ 25/06/2005 14:20:20
_/ _ \_`_`_`_) Serge PACCALIN -- sp ad mailclub.net
\ \_L_) Il faut donc que les hommes commencent
-'(__) par n'être pas fanatiques pour mériter
_/___(_) la tolérance. -- Voltaire, 1763

[David Lee Conley]

Re: VC++.NET 2003 - halp - string


"man" <pizzazzBEZSPAM U@poczta.onet.p l> wrote in message
news:d9jf44$ofr $1@news.onet.pl ...[color=blue]
> Hello,
> At first I have to warn you - I'm a newbie so don't shout me down and
> don't
> beat me :).
>
> I have a few problems concerning programming using VC++ .NET Std 2003
> (particularly Windows Forms):
> 1) I do not know how to take text fram a text file and paste it into a
> textBox. I can do it like that:
> ifstream in("teksttt.txt ");
>
> ofstream out("teksttt.tx t");
>
> string linia;
>
> while(getline(i n,linia))
>
> asa += linia + "\n";
>
>
> but then I can't paste it into textBox:
> textBox1->Text = in;
>
> It shows a problem/error:
> "error C2664: 'void System::Windows ::Forms::TextBo x::set_Text(Sys tem::
> String__gc*)' : cannot convert parameter 1 from 'std::ifstrem' to
> 'System::String __gc*' "
>
> How to convert 'string' into other one to make possible pasting it into a
> textBox?
> What type should I use?
>
> 2) I have to paste the text like this one:
> "There are n men and m women.":
> "There are " + n.ToString + " men and " + m.ToString " women."
> Am i right?
>
>
> Thanks in advance...
>
>
> man
>[/color]

The problem you're having appears to be that you're trying to program
standard C++ (called unmanaged code in VC.NET) in a .NET project (managed
code). I only just started learning VC++ .NET 2003 last week, but here's
some code to help you open and read a text file and assign the data straight
to a text box:

System::IO::Str eamReader* myFile;
myFile = System::IO::Fil e::OpenText("te ksttt.txt");
this->textBox1->Text = myFile->ReadLine();
ini->Close();

If you want to perform string concatenation while reading a file before
assigning it to a text box, you need the following:

System::Text::S tringBuilder* linia = new System::Text::S tringBuilder();

// do your file stuff here and start your loop

linia->Append(myFil e->ReadLine());

// end of your loop

this->textBox1->Text = linia->ToString();

You can also do the following to replace parameters in a string with values
from variables:

linia->Append("Ther e are {0} men and {1} women.", menvariable.ToS tring(),
womenvariable.T oString());

Hope this helps.

Dave

[man]

Re: VC++.NET 2003 - halp - string

> Hope this helps.

Thank you very much. I'll check it up.
[color=blue]
> Dave[/color]

me :)