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Hello.

Please teach a sample to load Text data or Save Text Data.

The rich edit control supports stream based getting and setting of its text. Here is the very simple article describing how to load rich text into rich text editor control:

http://www.codeguru.com/richedit/rtf_string_streamin.shtml

Here is the source code based on article above:

class CTeraRichEditCtrl : public CRichEditCtrl
{
public:
                CString GetRTF();
                void SetRTF( const CString & sRTF );

                CString GetPlainText();
                void SetPlainText( const CString & sPlainText );

protected:
                static __EXT_MFC_DWORD_PTR CALLBACK stat_StreamIn( __EXT_MFC_DWORD_PTR dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb );
                static __EXT_MFC_DWORD_PTR CALLBACK stat_StreamOut( __EXT_MFC_DWORD_PTR dwCookie, LPBYTE pbBuff, LONG cb, LONG* pcb );
};

CString CTeraRichEditCtrl::GetRTF()
{
EDITSTREAM es;
                es.dwError = 0;
                es.pfnCallback = stat_StreamOut;
 CString sRTF = _T("");
                es.dwCookie = (__EXT_MFC_DWORD_PTR) &sRTF;
                StreamOut( SF_RTF, es );
                return sRTF;
}

void CTeraRichEditCtrl::SetRTF( const CString & sRTF )
{
EDITSTREAM es;
                es.dwError = 0;
                es.pfnCallback = stat_StreamIn;
                es.dwCookie = (__EXT_MFC_DWORD_PTR) LPVOID(&sRTF);
                StreamIn( SF_RTF, es );
                
}

CString CTeraRichEditCtrl::GetPlainText()
{
                HideSelection( TRUE, FALSE );
long nStartChar = 0, nEndChar = 0;
                GetSel( nStartChar, nEndChar );
long nTextLength = GetTextLength();
                SetSel( 0, nTextLength );
CString strPlainText( _T("") );
                strPlainText = GetSelText();
                SetSel( nStartChar, nEndChar );
                HideSelection( FALSE, FALSE );
                return strPlainText;
}

void CTeraRichEditCtrl::SetPlainText( const CString & sPlainText )
{
EDITSTREAM es;
                es.dwError = 0;
                es.pfnCallback = stat_StreamIn;
                es.dwCookie = (__EXT_MFC_DWORD_PTR) LPVOID(&sPlainText);
                StreamIn( SF_TEXT, es );
                
}

__EXT_MFC_DWORD_PTR CALLBACK CTeraRichEditCtrl::stat_StreamIn( __EXT_MFC_DWORD_PTR dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb )
{
CString *pstr = (CString *) dwCookie;
                if ( pstr->GetLength() < cb )
                {
                                (*pcb) = pstr->GetLength();
                                ::memcpy( pbBuff, (LPCSTR) *pstr, *pcb );
                                pstr->Empty();
                }
                else
                {
                                *pcb = cb;
                                ::memcpy( pbBuff, (LPCSTR) *pstr, *pcb );
                                *pstr = pstr->Right(pstr->GetLength() - cb);
                }
                return 0;
}

__EXT_MFC_DWORD_PTR CALLBACK CTeraRichEditCtrl::stat_StreamOut( __EXT_MFC_DWORD_PTR dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb )
{
CString * pStream = (CString*)dwCookie;
                ASSERT( pStream != NULL );
char * tmp_buf = (char *)::malloc( cb+1 );
                if( tmp_buf != NULL )
                {
                                ::memcpy( tmp_buf,pbBuff, cb );
                                tmp_buf[cb] = ’\0’;
                                (*pStream)  += tmp_buf;
                                ::free( tmp_buf );
                }
                return 0;
}

Hello.

Thank you