Typcasting string & LPSTR :: MFC

Hi.

I would like to know a way to correctly cast a string object to LPSTR.

I have an LVITEM structure for a CListCtrl.

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string szText = "testing 1 2 3";
LVITEM item;
...

// Compiler does not allow this kind of typecasting.
// Note "testing 1 2 3" along is not an option. I can use a string
// and/or CString object.

item.pszText = szText;
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How do you get the line above to work? I have tried using a CString object, but the compiler kept responding with an error about LPSTR.

Thanks,
Kuphryn

Do I need to allocate new memory and then copy the characters from string.c_str()?

Kuphryn

I would think that string.c_str() should work ok.

If not then just declare it as the type required:

LPSTR lpszStr="testing 1 2 3";

LPSTR is a just pointer to a null terminated char array ie an ANSI string.

Code:

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CString szText = "testing 1 2 3";
LVITEM item;
item.pszText = szText.GetBuffer(0);

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You can get away with nthe above...

Personally I would try to stick with the MFC CString as opposed to the STL version (if your in MFC....use MFC CString as its fits in with the rest of the framework)

Also, unless you are going to alter and update this structure, use a constant string as opposed to a variable...it makes more sense

Okay. Thanks.

Fordy: Do you mean to add "const" declaration to any local variable that remains constant throughout the function call?

Kuphryn

Quote:

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Originally posted by kuphryn
Okay. Thanks.

Fordy: Do you mean to add "const" declaration to any local variable that remains constant throughout the function call?

Kuphryn

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Waht I mean is that if the string isnt likely to change huge amount, then use a char array

Sometimes I call functions that may return a string object.

Kuphryn