how to use edit control in MFC?

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i want to make an edit control box in which user can enter some value. so i drag an edit control to my dialog. add a variable "value of type CString to this edit control. then i add an event handler of message type EN_CHANGE to this edit control. what should i do next?

Posted 30-Jun-10 8:04am

Sweety Khan

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Sweety Khan 2-Jul-10 16:07pm

i m heartLy thankful to all who help me in my project :) SpeCial thanks and Best wiShes for Sauro Viti, Niklas Lindquist, SnowHow,emilio_grv,Sandeep Mewara,Richard MacCutchan,Jayant Dash,John Simmons, CPallini, Moak. Sorry if i forget someone's name.

3 solutions

Solution 1

Try compiling the application.

Posted 30-Jun-10 9:54am

#realJSOP

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Niklas L · Accepted Answer · 2010-06-30T10:14:00

Solution 2

You don't need an event handler for EN_CHANGE unless you plan on doing something while the user types, like updating a preview or making selections in another control.

Look at your implementation of the virtual DoDataExchange()[^] function and you will see how your CEdit is interchanging data with the CString object. Also, read about the UpdateData()[^] function on msdn.

...and of course, don't forget John Simmons suggestion. It is a good one! ;)

Posted 30-Jun-10 10:14am

Niklas L

Comments

Sweety Khan 1-Jul-10 14:00pm

hmm u both making fun of me :) obviously i compiled it many times

Sweety Khan 1-Jul-10 14:10pm

yes i have to do something with what the user types

Sweety Khan 2-Jul-10 2:07am

i got this code and understand it from this site http://www.codersource.net/mfc/mfc-tutorials/cedit.aspx but that does not work as i want.

Sweety Khan 2-Jul-10 2:08am

UpdateData();CString strStoreValue; strStoreValue=value; UpdateData(FALSE);

Sweety Khan 2-Jul-10 2:13am

what i m doing wrong?

Niklas L · Accepted Answer · 2010-07-01T22:36:00

UpdateData() only affects the variables you have hooked up to your control in DoDataExchange().
*.h

CString m_strEditValue;

*.cpp

DoDataExchange(CDataExchange* pDX)
{
    DDX_Text(pDX, IDC_EDIT, m_strEditValue);
}
SomewhereElse()
{
    UpdateData(TRUE); // Get value from control to variable
      // m_strEditValue now contains the value entered in the edit control

    UpdateDate(FALSE); // Send variable data to control
      // The edit control now contains the value of m_strEditValue
}

UpdateData() will eventually call your DoDataExchange() method. Step into it with a debugger and see how it works to get a better understanding.