[MFC]CEdit获取一行的文字

 CEdit的接口LineLength(nCharIndex) 的参数并不是指CEdit的第几行，需要通过函数LineIndex来进行转换。

int nIndex = 4 ; //假设要获取CEdit的第4行的文字 int nCharIndex = nCharIndex = this->LineIndex(nIndex) ; int nlen = this->LineLength(nCharIndex) ; CString strText ; this->GetLine(nIndex, strText.GetBuffer(nlen), nlen) ; strText.ReleaseBuffer() ;

下面是获取鼠标双击CEdit的那行文字
void MyEdit::OnLButtonDblClk(UINT nFlags, CPoint point) { CEdit::OnLButtonDblClk(nFlags, point) ; int nIndex = this->CharFromPos(point) ; int nCharIndex = LOWORD(nIndex) ; nIndex = HIWORD(nIndex) ; if (nIndex == -1) { return ; } CString strText ; int nCharIndex = this->LineIndex(nIndex) ; int nlen = this->LineLength(nCharIndex) ; this->GetLine(nIndex, strText.GetBuffer(nlen), nlen) ; strText.ReleaseBuffer() ; }