MFC DDV_MinMaxFloat does not work

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   There is an edit box in the dialog which can take only floating point numbers 
To achieve following  Dialog Data Validation of MFC is used
DDV_MinMaxFloat 

UpdateData(TRUE) will validate the values entered and and error message box is popped up automatically by the MFC Framework

 This is working fine in following scenarios: 
 1. When the Edit box is empty 
 2. Edit box has strings : For eg: Hello

 But it is not working if a string starts with a numerical value. For eg: 12Hello 

 In this case Hello is truncated and only the value 12 is used for validation. 
 This is not our requirement we need to pop up an error message box in this case as well. 

My Do DataExchange function looks something like this:
void MDSWDMOTNInterfaceDlg::DoDataExchange(CDataExchange* pDX)

{
CDialog::DoDataExchange(pDX);

//{{AFX_DATA_MAP(MDSWDMOTNInterfaceDlg::DoDat)

DDX_Control(pDX, IDC_EDIT_TIME_COST, m_EditTimeCost);

DDX_Control(pDX, IDC_EDIT_TIME_WAVE, m_EditTimeWave);

DDX_Text(pDX, IDC_EDIT_TIME_COST, m_fTimeCost);

DDX_Text(pDX, IDC_EDIT_TIME_WAVE, m_fTimeWave);

DDV_MinMaxFloat(pDX,m_fTimeCost,(float)0,(float)MAX_FLOAT);

DDV_MinMaxFloat(pDX,m_fTimeWave,(float)0,(float)MAX_FLOAT);

DDX_Control(pDX, IDC_CUSTOM_CHECK, m_CheckCustomOptions);

DDX_Control(pDX, IDC_RADIO_COST, m_RadioCostOptimiz);

DDX_Control(pDX, IDC_RADIO_WAVE, m_RadioCostWaveOptimiz);

DDX_Control(pDX, IDC_EDIT_OPERINFO, m_OutputEdit);

DDX_Text(pDX, IDC_EDIT_OPERINFO, m_strOpraInfo);

DDX_Control(pDX, IDC_BUTTON_PLAN, m_PlanButton);

//}}AFX_DATA_MAP

}

Please let me know what is the reason for this and how to resolve it without writing our own code for validations. 

 Note:  
 1. This code is written in Microsoft Visual Studio 2005
 2. If the same code is written in MS VC6 then MFC framework automatcally handles all scenarios and it working fine.

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
devam Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 20 March 2008 Location: India Status: Offline Points: 15	Post Options Post Reply Quote devam Report Post Thanks(0) Quote Reply Topic: MFC DDV_MinMaxFloat does not work Posted: 02 March 2009 at 1:21am
	There is an edit box in the dialog which can take only floating point numbers To achieve following Dialog Data Validation of MFC is used DDV_MinMaxFloat UpdateData(TRUE) will validate the values entered and and error message box is popped up automatically by the MFC Framework This is working fine in following scenarios: 1. When the Edit box is empty 2. Edit box has strings : For eg: Hello But it is not working if a string starts with a numerical value. For eg: 12Hello In this case Hello is truncated and only the value 12 is used for validation. This is not our requirement we need to pop up an error message box in this case as well. My Do DataExchange function looks something like this: void MDSWDMOTNInterfaceDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(MDSWDMOTNInterfaceDlg::DoDat) DDX_Control(pDX, IDC_EDIT_TIME_COST, m_EditTimeCost); DDX_Control(pDX, IDC_EDIT_TIME_WAVE, m_EditTimeWave); DDX_Text(pDX, IDC_EDIT_TIME_COST, m_fTimeCost); DDX_Text(pDX, IDC_EDIT_TIME_WAVE, m_fTimeWave); DDV_MinMaxFloat(pDX,m_fTimeCost,(float)0,(float)MAX_FLOAT); DDV_MinMaxFloat(pDX,m_fTimeWave,(float)0,(float)MAX_FLOAT); DDX_Control(pDX, IDC_CUSTOM_CHECK, m_CheckCustomOptions); DDX_Control(pDX, IDC_RADIO_COST, m_RadioCostOptimiz); DDX_Control(pDX, IDC_RADIO_WAVE, m_RadioCostWaveOptimiz); DDX_Control(pDX, IDC_EDIT_OPERINFO, m_OutputEdit); DDX_Text(pDX, IDC_EDIT_OPERINFO, m_strOpraInfo); DDX_Control(pDX, IDC_BUTTON_PLAN, m_PlanButton); //}}AFX_DATA_MAP } Please let me know what is the reason for this and how to resolve it without writing our own code for validations. Note: 1. This code is written in Microsoft Visual Studio 2005 2. If the same code is written in MS VC6 then MFC framework automatcally handles all scenarios and it working fine.
	DC

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 02 March 2009 at 7:37am
	Hi, guess you need create own DDX_Text for such edit. See original one and change it.
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

devam Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 20 March 2008 Location: India Status: Offline Points: 15	Post Options Post Reply Quote devam Report Post Thanks(0) Quote Reply Posted: 02 March 2009 at 7:46am
	Hi Oleg, Thanks for the response. But I have already mentioned in the problem description that I want to know why this is happening, and if there is any solution available without having to code for validation ourselves.
	DC

devam Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 20 March 2008 Location: India Status: Offline Points: 15	Post Options Post Reply Quote devam Report Post Thanks(0) Quote Reply Posted: 03 March 2009 at 12:03am
	Hi Oleg, One more doubt. In your reply, you mentioned that we need to create our own DDX_Text for such an edit. But DDX_Text is not used for validation purposes, it is used to bind the control to a member variable. Did you mean that we implement our own DDV_MaxMinFloat? How can we write our own DDX_Text to match our requirement of validating a string beginning with digits?
	DC

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 03 March 2009 at 12:59am
	Hi, DDX_Text in 2005 parse "12Hello" as 12 so its reason that DDV_MaxMinFloat validate value right. So most easy way is to copy DDX_Text for float value from VC6 to your code and rename it to DDX_TextFloat.
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS