Accessing a Specific Text Line Inside CEditView :: MFC

[valikac]

Hello. I have a program running under doc/view single doc architecture. When the user opens a text file, the program displays the data from the text file in its original form. Special thanks to Tychom for the key technique. When the program first opens the file, it saves data into a CStringList. However, if the user make changes to one or more lines of text, I have not been able to access the updated text. For example: Original text: --- a b c --- Modified text: --- az b cy0 --- I can get the updated text using GetWindowText(), but that function only returns a specific line parallel to the cursor. What if the user add one or more new lines? I have no way to accessing a specific line. There is a function in CEdit, getline(). The first parameter is the line index. The second is a reference to LPTSTR. I tried to use that function to get a specific line, but the program crashed with an error "bad pointer." LPTSTR text; CEditCtrl::getline(1, text); // this program crashes here every time Is there a way to access a specific line inside CEditView not dependent on where the cursor location? Thanks, Kuphryn

[moliate]

The problem is that your string is not initialized. From MSDN (edited for readability): **int CEdit::GetLine( int nIndex, LPTSTR lpszBuffer ) const; int CEdit::GetLine( int nIndex, LPTSTR lpszBuffer, int nMaxLength ) const;** **lpszBuffer** - Points to the buffer that receives a copy of the line. The first word of the buffer must specify the maximum number of bytes that can be copied to the buffer. **nMaxLength** - GetLine places this value in the first word of lpszBuffer before making the call to Windows. Allocate memory for your buffer and make sure the length is inserted, and it should work.... /moliate

[jack Mesic]

Call UpdateData(TRUE); at first. Regards http://www.ucancode.net/ (Xtreme Diagram++ Library with full MFC Source Code)

[valikac]

Thanks! I have one question. In the line: // CString myString; CEditCtrl::GetLine(1, myString.GetBuffer(255), 255); Is 255 the maximun number of characters in *that line*? I would like to get everything on that line. In general, is the size (255 in this case) referring to bytes or characters (characters * bytes = maxsize?). Kuphryn