Convert a char array to a managed system string

[Trep]

Hi there!

I've been having a lot of difficult trying to figure out a way to convert
a terminated char array to a system::string for use in Visual C++ .NET
2003.

This is necessary because I have some legcay C code that needs to process
a string taken from a textbox, then I need to re-display the string as the
textbox->Text. I easily found how to convert from system::string to char[]
but I can't figure out how to go the other way!!

Can someone point me in the right direction? I'm pretty new to VC++
managed programming and the whole GUI thing! :S

[Tim Love]

"Trep" <da**********@g mail.com> writes:

Hi there! I've been having a lot of difficult trying to figure out a way to convert
a terminated char array to a system::string for use in Visual C++ .NET
2003.

C++ doesn't have system::string, but on the analogu of std::string
system::string s = the_char_array;
is worth trying.

[Trep]

Okaaay... first off, let me just apologize for the atrocious spelling in my
initial post. It's still pretty early here and my brain is a little zapped!
I should have taken the time to run a spell-check.

Sorry :(

[Ioannis Vranos]

Trep wrote:

Hi there!

I've been having a lot of difficult trying to figure out a way to convert
a terminated char array to a system::string for use in Visual C++ .NET
2003.

This is necessary because I have some legcay C code that needs to process
a string taken from a textbox, then I need to re-display the string as the
textbox->Text. I easily found how to convert from system::string to char[]
but I can't figure out how to go the other way!!

Can someone point me in the right direction? I'm pretty new to VC++
managed programming and the whole GUI thing! :S

..NET is entirely off topic here, however in the future C++/CLI will be
on topic (but not any system specific libraries of course, like ADO .NET
or whatever).
In any case, if you want to convert an std::string to "char[]" a call to
c.str() member function will suffice.
Example in C++/CLI:
std::string s="Test";

String ^someString= gcnew String(s.c_str( ));

String otherString(s.c _str());

[

Off topic:

In current "managed extensions":
std::string s="Test";

String *someString= __gc new String(s.c_str( ));

]

--
Ioannis Vranos

http://www23.brinkster.com/noicys

[Trep]

But... I was under the impression that VC++ .NET used managed strings,
which evolved from CStrings???

My reason for saying this is that I keep getting tips from the compiler
saying the following when, for example, I try to directly set a .NET
textbox contents to equal the contents of a string:

Cannot convert parameter 1 from 'unsigned char *' to 'System::String __gc
*'

So I searched the web and found how to make a System::String __gc * into a
char * but I can't find how to go the other way!

Maybe I'm missing your point??

[JKop]

Trep posted:

Hi there!

I've been having a lot of difficult trying to figure out a way to
convert a terminated char array to a system::string for use in Visual
C++ .NET 2003.

This is necessary because I have some legcay C code that needs to
process a string taken from a textbox, then I need to re-display the
string as the textbox->Text. I easily found how to convert from
system::string to char[] but I can't figure out how to go the other
way!!

Can someone point me in the right direction? I'm pretty new to VC++
managed programming and the whole GUI thing! :S

I haven't a clue about .NET, nor have I had a peek at the definition of
"system::string ", but... were I to guess:

system::string ConvertStringTo SysString(char const blah[])
{
return system::string( blah);
}
-JKop

[JKop]

Trep posted:

But... I was under the impression that VC++ .NET used managed strings,
which evolved from CStrings???

My reason for saying this is that I keep getting tips from the compiler
saying the following when, for example, I try to directly set a .NET
textbox contents to equal the contents of a string:

Cannot convert parameter 1 from 'unsigned char *' to 'System::String
__gc *'

So I searched the web and found how to make a System::String __gc *
into a char * but I can't find how to go the other way!

Maybe I'm missing your point??

It wants a *pointer* to a System::String object.

(BTW, C++ is case sensitive, so be careful, is it "system::string " or
"System::String "?)
-JKop

[Ioannis Vranos]

Trep wrote:

But... I was under the impression that VC++ .NET used managed strings,
which evolved from CStrings???

..NET uses the System::String type of the CLI standard:

http://www.ecma-international.org/pu...s/Ecma-335.htm

--
Ioannis Vranos

http://www23.brinkster.com/noicys

[Ioannis Vranos]

Ioannis Vranos wrote:

Trep wrote:

Hi there!

I've been having a lot of difficult trying to figure out a way to convert
a terminated char array to a system::string for use in Visual C++ .NET
2003.

This is necessary because I have some legcay C code that needs to process
a string taken from a textbox, then I need to re-display the string as
the
textbox->Text. I easily found how to convert from system::string to
char[]
but I can't figure out how to go the other way!!

Can someone point me in the right direction? I'm pretty new to VC++
managed programming and the whole GUI thing! :S

.NET is entirely off topic here, however in the future C++/CLI will be
on topic (but not any system specific libraries of course, like ADO .NET
or whatever).
In any case, if you want to convert an std::string to "char[]" a call to
c.str() member function will suffice.

And now I realise you meant a null terminated char array to System::String.
String ^text= gcnew String(array);

[

Off topic:

"Managed extensions":
String *text= __gc new String(array);
]

--
Ioannis Vranos

http://www23.brinkster.com/noicys

[Trep]

Thanks for the quick replies. I'm sorry, I didn't realize that this wasn't
an appropriate group for .NET questions. I appreciate your suggestions and
I'll keep trying.