Question

C++ TCHAR string replacement?

Asked by: PMH4514

I have a TCHAR variable holding a string that contains an apostrophe.  I need to turn it into a double quote for insertion into a SQL command.. Normally with CString I use Replace(..) but I can't seem to find a way to do it on the TCHAR.. I could convert it to a string, replace and convert back but that seems wasteful.

thanks!

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Asked On
2009-02-26 at 12:19:48ID24181538
Topic

C++ Programming Language

Participating Experts
3
Points
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Comments
8

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Answers

 

by: jkrPosted on 2009-02-26 at 12:24:01ID: 23749248

You could use

TCHAR arr[] = _T("Your string here");
 
TCHAR* p = arr;
 
while (p = _tcschr(p,_T('\'')) {
 
  *p = _T("\"");
}

                                              
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by: waysidePosted on 2009-02-26 at 12:27:49ID: 23749303

TCHAR is an alias for either char or wchar_t, depending on whether you are compiling an ansi or unicode build. It is not a class.

The easiest is to convert it to a string and do the replace. Why reinvent the wheel?

String  classes are generally highly optimized and very efficient, so don't worry about using a few extra CPU cycles, you will most likely never notice unless going a very large number (like hundreds of thousands) at once.

 

by: waysidePosted on 2009-02-26 at 12:30:49ID: 23749338

If you really don't want to use a string class, you can:

- repeatedly use _tcschr() to find all the characters you want to replace and manually replace it;

- walk the characters of the string yourself in a for loop or while loop, looking for the one you want to replace, and manually replacing it.

 

by: jkrPosted on 2009-02-26 at 12:35:29ID: 23749386

Hm, I guess '_tcschr()' has already been mentioned ;o)

 

by: waysidePosted on 2009-02-26 at 12:53:42ID: 23749641

Hmm, you'd think I'd have learned by now to refresh before I hit the submit button, because the odds of me beating you to a solution are so low.   ;)

 

by: PMH4514Posted on 2009-02-28 at 06:10:40ID: 23763730

I'm not sure there's anything either of you doesn't know about C++
:-)

 

by: DanRollinsPosted on 2009-02-28 at 16:50:33ID: 23766132

>> I need to turn it into a double quote for insertion into a SQL command..

Don't you mean that you need to convert it into two apostrophes?  In SQL statements, a double quote (") is a very different thing from two adjacent single quote (') characters (apostrophes).  The SQL parser treats '' (two apostrophes) as one apostrophes.  That is probably what you need to do.

 

by: PMH4514Posted on 2009-02-28 at 21:01:16ID: 23766936

yes sorry I mis-typed.. two apostrophies. :)

20120131-EE-VQP-002

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