vs下調試程序時，把信息打印到輸出窗口

轉載：https://blog.csdn.net/cwj066/article/details/82423627

　　   https://stackoverflow.com/questions/20508086/getting-rid-of-atltracegeneral-category-shown-in-atltrace-output

方法一：寫一個變參函數，把想要打印到輸出窗口的信息傳給函數，函數內部調用系統函數OutputDebugString()，就可以把調試信息打印到輸出窗口。

void OutputDebugPrintf(const char* strOutputString,...)
{
    char strBuffer[4096] = {0};

    va_list vlArgs;
    va_start(vlArgs, strOutputString);
    _vsnprintf_s(strBuffer, sizeof(strBuffer) - 1, strOutputString, vlArgs);
    
    va_end(vlArgs);
    OutputDebugString(CA2W(strBuffer));
}

方法二：調用系統自帶的庫函數TRACE()，這個函數其實和printf()類似，只不過printf()這個是把信息輸出到控制台窗口，而TRACE()這個函數是把信息輸出到vs2010的輸出窗口，方便編程人員調試用。

TRACE(“%s”, "no error, no warning");

TRACE(“%d”, 1024);

TRACE(“%d”, 520.1314);

TRACE(“%c”, 'U');

頭文件：

#include<afx.h>

 

未驗證方法1

其它：不想要這個信息

采用下面的方法，顯示的信息變成：

問題：

After upgrading to VS2013 I started receiving all my ATLTRACE2 messages in a "() : atlTraceGeneral - My output" format.

e.g.

ATLTRACE(_T("This is my data: %d\n"), 124);

... shown as

dllmain.cpp(1121) : atlTraceGeneral - This is my data: 124

I don't need any additional info. Is here some way to get back to the previous format so that the output would be just

This is my data: 124

回答：

The only working fix is to undef ATLTRACE under _DEBUG macro and implement trace by yourself. Guys at Microsoft recommended the same.

The solution looks like this:

#ifdef _DEBUG
#ifdef ATLTRACE 
#undef ATLTRACE
#undef ATLTRACE2

#define ATLTRACE CustomTrace
#define ATLTRACE2 ATLTRACE
#endif // ATLTRACE
#endif // _DEBUG

with the following CustomTraces:

void CustomTrace(const wchar_t* format, ...)
{
    const int TraceBufferSize = 1024;
    wchar_t buffer[TraceBufferSize];

    va_list argptr; va_start(argptr, format);
    vswprintf_s(buffer, format, argptr);
    va_end(argptr);

    ::OutputDebugString(buffer);
}

void CustomTrace(int dwCategory, int line, const wchar_t* format, ...)
{
    va_list argptr; va_start(argptr, format);
    CustomTrace(format, argptr);
    va_end(argptr);
}