Asp.net C ++ No: digit and validity check

# Ifndef _ ct3d _ checkvalidval _ h __
# Define _ ct3d _ checkvalidval _ h __

Class cstringex
{
Private:
Cstring m_str;
Int m_dot_count;
 
Public:
Cstringex ()
{
M_dot_count = 0;
}
Cstringex (const cstring & s)
{
M_str = s;
}
Virtual ~ Cstringex ()
{
}

Public:
Bool isfloat ()
{
If (m_str.isempty ())
Return false;

M_dot_count = 0;

Int start_pos = 0;
Char c = m_str.getat (0 );
If (c = '+' | c = '-')
Start_pos = 1;

Int length = m_str.getlength ();
For (int I = start_pos; I <length; I ++)
{
C = m_str.getat (I );
If (c = '.')
{
M_dot_count ++;
Continue;
}

If (c <0x30 | c> 0x39)
Return false;
}

If (m_dot_count> 1) //... 23.
Return false;
If (length = 1 & (start_pos = 1 | m_dot_count = 1) //. or +
Return false;
If (length = 2 & start_pos = 1 & m_dot_count = 1) // +.
Return false;

Return true;
}

Bool isinterger ()
{
If (m_str.isempty ())
Return false;

Int start_pos = 0;
Char c = m_str.getat (0 );
If (c = '+' | c = '-')
Start_pos = 1;

Int length = m_str.getlength ();
For (int I = start_pos; I <length; I ++)
{
C = m_str.getat (I );
If (c <0x30 | c> 0x39)
Return false;
}

If (length = 1 & start_pos = 1) // +
Return false;

Return true;
}

Bool isvalidfloat (double minval, double maxval, bool ishasmin = true, bool ishasmax = true)
{
If (maxval <minval)
{
Double a = minval;
Minval = maxval;
Maxval =;
}

If (! Isfloat ())
Return false;

Double d = atof (lpctstr (m_str ));
If (ishasmin & d <minval)
Return false;
If (ishasmax & d> maxval)
Return false;

Return true;
}

Bool isvalidinterger (int minval, int maxval, bool ishasmin = true, bool ishasmax = true)
{
If (maxval <minval)
{
Int a = minval;
Minval = maxval;
Maxval =;
}

If (! Isinterger ())
Return false;

Int d = atoi (lpctstr (m_str ));
If (ishasmin & d <minval)
Return false;
If (ishasmax & d> maxval)
Return false;

Return true;
}
};

// Global functions
Class cstringvalid
{
Public:
// Valid String judgment
Static bool cstringvalid: strisfloat (const cstring & s)
{
Cstringex sx = s;
Return sx. isfloat ();
}

Static bool cstringvalid: strisnum (const cstring & s)
{
Cstringex sx = s;
Return sx. isinterger ();
}

Static bool cstringvalid: strisfloatvalid (const cstring & s, double minval, double maxval, bool ishasmin = true, bool ishasmax = true)
{
Cstringex sx = s;
Return sx. isvalidfloat (minval, maxval, ishasmin, ishasmax );
}

Static bool cstringvalid: strisintergervalid (const cstring & s, int minval, int maxval, bool ishasmin = true, bool ishasmax = true)
{
Cstringex sx = s;
Return sx. isvalidinterger (minval, maxval, ishasmin, ishasmax );
}
};

# Endif