Entering hex data in an Edit Box

[tmoody]

There must be an easy way to have the user enter hex data in an Edit Box. I have the variable delcared as a CString but that allow the user to enter naything. This was easy in C, so there must be an easy way in C++ using MFC.

 

[DavesTips]

MFC has a validation mechanism, you could write your own DDV routine which fits in with this architecture:

void DDV_Hex(CDataExchange* pDX, CString val)
{
if (pDX->m_bSaveAndValidate)
{
for (int i = 0; i<val.GetLength(); i++)
{
char c = val;
if (!((c>='0' && c<='9') || (c>='a' && c<='f') || (c>='A' && c<='F')))
{
pDX->Fail();
return;
}
}
}
}

And put it into DoDataExchange() like this:

void CTestDlg:oDataExchange(CDataExchange* pDX)
{
CDialog:oDataExchange(pDX);
//{{AFX_DATA_MAP(CTestDlg)
DDX_Text(pDX, IDC_EDIT1, m_edit1);
DDV_Hex(pDX,m_edit1);
//}}AFX_DATA_MAP
} Click here if this helped!
vvvvvvvvv

 

[tmoody]

Thanks Dave, I'm almost there. Apparently my Edit Box still wants an integer but I'm much closer. Thanks.