Trace a CString

[_Flaviu]

I have few methods, in a CDocument class, which read from IHTMLElement get_tagName.

						BSTR bstrTagName;
						CString sTempTagName;
						if (! FAILED(pElem->get\_tagName(&bstrTagName)))
						{
							sTempTagName = bstrTagName;
							sTempTagName.MakeLower();
							AfxMessageBox(sTempTagName);
							SysFreeString(bstrTagName);
						}

which show in MessageBox html tags: input, div, span, and so on ... if I try

						BSTR bstrTagName;
						CString sTempTagName;
						if (! FAILED(pElem->get\_tagName(&bstrTagName)))
						{
							sTempTagName = bstrTagName;
							sTempTagName.MakeLower();
							TRACE("%s\\n", sTempTagName);
							SysFreeString(bstrTagName);
						}

I have in my debug window the first letter of every read tag: i d s and no entire html tag ... why in MessageBox I see whole word, but in TRACE macro I don't ?

[Lost User]

The debugger does not always recognise that a character array may be Unicode, so you need to add the type to the variable name or address in the watch window.

[David Crow]

You may need to add ,s or ,u to the variable being watched in the Watch window.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles

[_Flaviu]

In watch window I can see the variables with their values normally, the problem is when I want to see them with TRACE macro, in my debug window ...

[Jochen Arndt]

You are calling the TRACE macro with a char* format string but pass a CString which is wchar_t* with Unicode builds. Use one of these:

// Use the _T() macro
TRACE(_T("%s\n"), sTempTagName.GetString());

// Pass type of string in format
#ifdef _UNICODE
TRACE("%ls\n"), sTempTagName.GetString());
#else
TRACE("%hs\n"), sTempTagName.GetString());
#endif

// Use TRACEn which is inserting the _T() macro
TRACE1("%s\n", sTempTagName.GetString());

Note also that I have used GetString() instead of the implicit CString LPCTSTR operator.

[David Crow]

_Flaviu wrote:

the problem is when I want to see them with TRACE macro, in my debug window ...

Try %S instead of %s.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles

[tony attwood ntlworld com]

Thanks - I've been looking for a few days for this solution. Works a treat