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VC编辑框追加字符串并自动滚屏功能

2012-01-17 19:29:00| 分类： VC++ | 标签： |举报 |字号大中小订阅

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今天在编写串口通信时，当接收到的字符串达到一定大小时，vc将会崩溃报错。
原因是在程式在接受数据时同时将数据写入了edit的关联变量力造成了数据的超限
改正方法是取消变量，直接通过往控件里插入数据。
也就是参照下面方法修改而来
long len = m_edit.GetWindowTextLength();
m_edit.SetSel(len,len);
m_edit.ReplaceSel(str);

下面的方法是转自网络。
CEdit *pEt = (CEdit *)GetDlgItem(IDC_EDIT_RECV);
//方式1
int nLen = GetWindowTextLength(pEt->m_hWnd);
pEt->SetSel(nLen, nLen);
pEt->ReplaceSel("要添加的文字");

//方式2
::SendMessage(GetDlgItem(hwnd,IDC_EDIT_RECV),EM_SETSEL,-1,0);
::SendMessage(GetDlgItem(hwnd,IDC_EDIT_RECV),EM_REPLACESEL,false,(long)buffer);

//方式3
CString str="append ";
int nLength=pEt->SendMessage(WM_GETTEXTLENGTH);
pEt->SetSel(nLength,nLength);
pEt->ReplaceSel(str);

//自动滚屏
pEt->LineScroll(pEt->GetLineCount());

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