CRichEditCtrl::GetLine出错

[果菲]

int nLineLength, nLineIndex, nLineCount = m_myRichEditCtrl.GetLineCount();
CString strText, strLine;
for (int i = 0; i < nLineCount; i++)
{
   nLineIndex = m_myRichEditCtrl.LineIndex(i);
   nLineLength = m_myRichEditCtrl.LineLength(nLineIndex);
   m_myRichEditCtrl.GetLine(i, strText.GetBufferSetLength(nLineLength + 1),　nLineLength);
   strText.SetAt(nLineLength, _T('\0')); // null terminate
   strText.ReleaseBuffer(nLineLength + 1);

   TRACE(_T("line %d: '%s'\r\n"), i, strText);
}

上面代码是来自：MSDN.

CRichEditCtrl控件内有两行内容:
“LKASFJAASDLFKA
G”
注意：当第二行只有一个字母，取第二内容时，运行到GetLine时就异常报错。请教大家，谢谢啦

[果菲]

m_myRichEditCtrl.GetLine(i, strText.GetBufferSetLength(nLineLength + 1),　nLineLength);
把这个代码改成：
m_myRichEditCtrl.GetLine(i, strText.GetBuffer(nLineLength));

返回的结果：strText为空。

[果菲]

ENSURE(sizeof(nMaxLength)<=nMaxLength*sizeof(TCHAR)&&nMaxLength>0)；报错的地方

[muzizongheng]

[Quote=引用 1 楼 flightboy1109 的回复:]

m_myRichEditCtrl.GetLine(i, strText.GetBufferSetLength(nLineLength + 1),　nLineLength);
把这个代码改成：
m_myRichEditCtrl.GetLine(i, strText.GetBuffer(nLineLength));

返回的结果：strText为空。
[/Quote]

改成m_myRichEditCtrl.GetLine(i, strText.GetBuffer(0));
。。。。
strText.ReleaseBuffer();

[Eleven]

m_myRichEditCtrl.GetLine(i, strText.GetBufferSetLength(nLineLength + 1), nLineLength);
-->
m_myRichEditCtrl.GetLine(i, strText.GetBufferSetLength(nLineLength + 1), nLineLength+1);

[Eleven]

m_myRichEditCtrl.GetLine(i, strText.GetBufferSetLength(nLineLength + 1), nLineLength);
-->
m_myRichEditCtrl.GetLine(i, strText.GetBufferSetLength(nLineLength + 1), nLineLength+1);

[果菲]

m_myRichEditCtrl.GetLine(i, strText.GetBufferSetLength(nLineLength + 1), nLineLength);

nLineLength这个值要大于或等于4

因为ENSURE(sizeof(nMaxLength)<=nMaxLength*sizeof(TCHAR)&&nMaxLength>0)；中的：
sizeof(nMaxLength)<=nMaxLength*sizeof(TCHAR)（ 4<=nMaxLength*1）
所以nMaxLength要大于或等于4