CString :: GetAt的问题

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

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 []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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