CString :: GetAt的问题 [英] Problem with CString::GetAt

问题描述

我有代码：

Hi,

I have the code:

CString buf;
buf.Preallocate(255);
GetWindowText(GetForegroundWindow(), buf.GetBuffer(), 255);

int Bracket = buf.Find("[");
char p = buf.GetAt(Bracket+1);

buf是：SONAR X1 Producer - [Two Track.cwp - Track]

Bracket是：20 - 所以它找到了''''字符。



我希望p为''T''



我所遇到的麻烦就是atlsimpstr.h中的一个断言line：



ATLASSERT（（iChar> = 0）&&（iChar< = GetLength（）））; //索引''\ 0''是好的



iChar是21并且小于字符串长度。



什么可能是我的问题？

buf is: "SONAR X1 Producer - [Two Track.cwp - Track]"
Bracket is: 20 - So it found the ''['' character.

I want p to be ''T''

All I get for my trouble is an assertion in atlsimpstr.h at line:

ATLASSERT( (iChar >= 0) && (iChar <= GetLength()) ); // Indexing the ''\0'' is OK

iChar is 21 and less than the string length.

What the diddly hoo could be my problem?

推荐答案

你需要做的就是致电：

All you need to do is to call:

buf.ReleaseBuffer();

后你的

after your

GetWindowText(GetForegroundWindow(), buf.GetBuffer(), 255);

更好，将GetWindowText行修改为：

Better of, modify the GetWindowText line to:

GetWindowText(GetForegroundWindow(), CStrBuf(buf, 255), 255);

并摆脱Preallocate（）。在这种情况下，您不再需要担心ReleaseBuffer（）。阅读 CStrBuf [ ^ ]在MSDN中获取更多信息。这是一个非常方便的包装

and get rid of Preallocate(). In this case you would not need to worry about ReleaseBuffer() anymore. Read about CStrBuf[^] in MSDN for more information. It''s a very handy wrapper

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