Solved

Best way to append text to CEdit control?

Posted on 1998-11-19
9
4,084 Views
Last Modified: 2013-11-20
What is the best way to append text to the end of a CEdit control?

I could use GetWindowText, add my new text to it, and then send it to SetWindowText. But that seems like too many steps.

I could use ReplaceSel, but that only works if the caret is at the end. If I do that, how do I set it to the end? I could do this:
 m_textExplanation.SetSel(m_textExplanation.GetLineCount() * m_textExplanation.LineLength(), m_textExplanation.GetLineCount() * m_textExplanation.LineLength());
 m_textExplanation.ReplaceSel("This is a test!\n");
But that seems like too much work, too.
0
Comment
Question by:TylerRick
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
9 Comments
 
LVL 2

Expert Comment

by:cyrilbdt
ID: 1325020
try to send WM_KEYDOWN with VK_END and then ReplaceSel.

hope this helps
0
 
LVL 2

Expert Comment

by:wyy_cq
ID: 1325021
i think this is not the best way . :-(

CString szT;
ed.GetWindowText(szT);
szT+="abc";
ed.SetWindowText(szT);

but perhaps this is the best way ,because it is very simple.
why not you think there need many steps.
0
 
LVL 2

Expert Comment

by:cyrilbdt
ID: 1325022
TylerRick use GetLineCount, wich means that it is multi line edit control (64K limit).
And if is happen frequently, you will transfer 20k to add 3 bytes...
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 8

Expert Comment

by:Answers2000
ID: 1325023
The GetWindowText/SetWindowText is easy, wrap into a function or derived class if you want to save some typing

class CXEdit : public CEdit
{
public:
  void AppendText( const CString& strAppend )
  {
         CString szT;
         GetWindowText(szT);
         szT+=strAppend ;
         SetWindowText(szT);  
  }
} ;

Provided you don't add any data members to CXEdit you can simply cast existing CEdit's, example (assume ed is a CEdit)

((CXEdit *)&ed)->AppendText( "abc" ) ;


0
 

Expert Comment

by:Malek103197
ID: 1325024
Here is one way that works:
Pass the text you want to append into the function below and it will append to the existing text in the Edit control.


void CEditTextDlg::Appendtext(LPCSTR pText)
{
      int nLen = GetWindowTextLength();
      m_Edit.SetFocus();
      m_Edit.SetSel(nLen, nLen);
      m_Edit.ReplaceSel(pText);
}


0
 
LVL 7

Expert Comment

by:psdavis
ID: 1325025
And here's my two cents worth.

I almost always create a Member Variable for a CEdit box.  (You would do it with the Member Variable tab in class wizard).  That will put a

CString m_strMyEditBox;

inside of your header file.

Then inside of the function you want to append your text...

CMyDialogBox::OnMyFunction( )
{
   UpdateData( TRUE );
 
// Now m_strMyEditBox has the contents of your string

   m_strMyEditBox += ".bmp";

   UpdateData( FALSE );
}

// And that's it.  The UpdateData combination will do all of the work for you.

Phillip
0
 

Author Comment

by:TylerRick
ID: 1325026
Maybe that is the best way, wyy_cq. I was just wondering if any of those steps could be avoided.

It sounds like they can't be. But it might be helpful, like Answers2000 suggested, to use a wrapper function.

psdavis, the problem with that is you are too limited with just a CString. You don't have the flexibility that you have if you map it to a CEdit. With a CEdit you can use the member functions, too.
0
 
LVL 15

Accepted Solution

by:
Tommy Hui earned 50 total points
ID: 1325027
Assuming

  CEdit* editCtrl = // is valid

  DWORD l = editCtrl->GetWindowTextLength();
  editCtrl->SetSel(l, l);
  editCtrl->ReplaceSel(newText);


0
 

Author Comment

by:TylerRick
ID: 1325028
Good, I didn't know about GetWindowTextLength(). Thanks for your help.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
In this post we will learn different types of Android Layout and some basics of an Android App.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Do you want to know how to make a graph with Microsoft Access? First, create a query with the data for the chart. Then make a blank form and add a chart control. This video also shows how to change what data is displayed on the graph as well as form…

729 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question