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VC++ Help: convert from System::String to const char*;
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I'm using VC++ .net to write a program for searching through files in a directory and then opening them. The only problem I have run into is opening the file. I tried using streamreader but this does not work for opening pdf files. Currently I'm using system ("start //location and name of file");
ex:
Now this works great except for the fact that I need for filename to be changed while in my program. I tried passing a string that was gathered earlier in the program into it and I get an error saying that cannot convert parameter 1 from System:: String ^ to const char *
code error:
Any and all help will be appreciated. ps: I have trolled the interwebz looking for an answer and can't find anything helpful.
ex:
C++ Syntax (Toggle Plain Text)
Now this works great except for the fact that I need for filename to be changed while in my program. I tried passing a string that was gathered earlier in the program into it and I get an error saying that cannot convert parameter 1 from System:: String ^ to const char *
code error:
C++ Syntax (Toggle Plain Text)
Any and all help will be appreciated. ps: I have trolled the interwebz looking for an answer and can't find anything helpful.
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#2 Oct 23rd, 2009
Are you using the
If so, have you tried using
<string> header?If so, have you tried using
filename.c_str() to get the actual string characters rather than the array? •
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#3 Oct 23rd, 2009
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Are you using the <string> header?
System::String is not the same as std::string . The former is the .NET framework's string class that is used in C++/CLI code.•
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I have trolled the interwebz looking for an answer and can't find anything helpful.
Last edited by Tom Gunn; Oct 23rd, 2009 at 1:18 pm.
-Tommy (For Great Justice!) Gunn
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#4 Oct 23rd, 2009
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Originally Posted by Tom Gunn 
System::Stringis not the same asstd::string. The former is the .NET framework's string class that is used in C++/CLI code.
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As I'm sure you've guessed, I'm pretty new to C++ (especially VC++).
Thanks for the info.
Last edited by Fbody; Oct 23rd, 2009 at 1:24 pm.
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#5 Oct 23rd, 2009
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Originally Posted by Tom Gunn
System::Stringis not the same asstd::string. The former is the .NET framework's string class that is used in C++/CLI code.
Your question is a Microsoft knowledge base article. It came up as the first hit when searching Google for your thread title.
Last edited by desimator55; Oct 23rd, 2009 at 1:35 pm. Reason: Added information
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#6 Oct 23rd, 2009
The last example can't be compled with the express edition.
Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.
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#7 Oct 23rd, 2009
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Originally Posted by Ancient Dragon
The last example can't be compled with the express edition.
Last edited by desimator55; Oct 23rd, 2009 at 1:50 pm.
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#8 Oct 23rd, 2009
I don't know of any workaround, but then I have not done all that much CLR programming.
Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.
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