一个奇怪的CString 问题？求教！

[nullname]

一段很简单的代码：
CString sBackUpPath;
GetPrivateProfileString("BackUp","Path","C:\\Backup",sBackUpPath.GetBuffer(128),128,"C:\\ini.ini");
//这个时候察看sBackUpPath的值是"C:\\Backup"
CString ttt=sBackUpPath+"UUU;
//而这个时候ttt的值是"UUU" ,这是为什么？

[nullname]

那位大哥拷贝上面代码试试

[topwork]

调用完GetPrivateProfileString以后先调用一下CString::ReleaseBuffer，如果不调用那么这个CString的内容不会被更新。

[ray21]

你最好使用 _T("UUU")

[rockersz]

CString sBackUpPath;
GetPrivateProfileString("BackUp","Path","C:\\Backup",sBackUpPath.GetBuffer(128),128,"C:\\ini.ini");
//这个时候察看sBackUpPath的值是"C:\\Backup"

////////////加一句：
sBackUpPath.ReleaseBuffer();

CString ttt=sBackUpPath+"UUU;

[yintongshun]

我试了下面的：
CString sBackUpPath="c:\\bak";
CString ttt=sBackUpPath+"UUU";
ttt为"c:\bakUUU"

[flinming]

GetPrivateProfileString("BackUp","Path","C:\\Backup",sBackUpPath.GetBuffer(128),128,"C:\\ini.ini");

第三个参数，为NULL代替

[zhangnanonnet]

加sBackUpPath.ReleaseBuffer();不过是挺奇怪的

[flinming]

补充下你用cstring取，还不如，直接用
char sBackUpPath[128];
GetPrivateProfileString("BackUp","Path",NULL,sBackUpPath,128,"C:\\ini.ini");

[nullname]

用CString 方便一些。

[topwork]

为什么要调用ReleaseBuffer，请大家看下面的MSDN说明：
If you use the pointer returned by GetBuffer to change the string contents, you must call ReleaseBuffer before using any other CString member functions.