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/// <summary>
/// This class is used to convert a string expression to a numeric one,
/// to evaluate this numeric expression and to reconvert the result back
/// to string
/// </summary>
public class FormulaGenerator
{
#region constructors
/// <summary>
/// implicit constructor
/// </summary>
public FormulaGenerator()
{
}//FormulaGenerator
#endregion constructors
#region public members
public static string EvaluationResult(string astrexpr)
{
try
{
if (astrexpr == "") astrexpr = "0";
EvalExpr(astrexpr);
return m_strservice;
}
catch(Exception aobjExc)
{
return "ERROR";
}
}//EvaluationResult
#endregion public members
#region private members
//this alghoritm work for expression with any level of parenthesis
private static void EvalExpr(string astrexpr)
{
if(ExistParenthesis(astrexpr))
{
int iposleftparenthesis = PosMaxLevel(astrexpr);
string strtemp = astrexpr.Substring(iposleftparenthesis + 1);
int iposrightparenthesis = FindFirstChar(strtemp, ')');
string strbetweenparenthesis = strtemp.Substring(0, iposrightparenthesis);
EvalAritm(strbetweenparenthesis.Trim());
string strbefore = astrexpr.Substring(0,iposleftparenthesis);
string strafter = astrexpr.Substring(iposleftparenthesis + iposrightparenthesis + 2);
EvalExpr(strbefore + m_strservice + strafter);
}
else EvalAritm(astrexpr.Trim());
}//EvalExpr
private static bool ExistParenthesis(string astrexpr)
{
m_iCharContor = 0;
int inbleft = 0;
NbOfChar(astrexpr,'(');
inbleft = m_iCharContor;
m_iCharContor = 0;
int inbright = 0;
NbOfChar(astrexpr, ')');
inbright = m_iCharContor;
if(inbleft != inbright) throw new Exception("Sintax Error!");
if (inbleft == 0) return false;
return true;
}//ExistParenthesis
private static int PosMaxLevel(string astrexpr)
{
int ipos = -1;
int ilevel = 0;
int maxlevel = LevelOfParenthesis(astrexpr);
foreach(char ch in astrexpr.ToCharArray())
{
ipos+=1;
if(ch == '(')
{
ilevel += 1;
if(ilevel == maxlevel)
{
return ipos;
}
}
else if(ch == ')')
{
ilevel -= 1;
}
}
return 0;
}//PosMaxLevel
private static int LevelOfParenthesis(string astrexpr)
{
int ilevel = 0;
int ipos = -1;
int maxlevel = 0;
foreach(char ch in astrexpr.ToCharArray())
{
ipos += 1;
if(ch == '(')
{
ilevel = ilevel + 1;
}
else if(ch == ')')
{
ilevel -= 1;
}
if(maxlevel < ilevel)
{
maxlevel = ilevel;
}
}
return maxlevel;
}//LevelOfParenthesis
private static int FindLastChar(string astrexpr, char acfinder)
{
return astrexpr.LastIndexOf(acfinder);
}//FindLastChar
private static int FindFirstChar(string astrexpr, char acfinder)
{
return astrexpr.IndexOf(acfinder);
}//FindFirstChar
private static int FindSecondChar(string astrexpr, char acfinder)
{
int ifirst = astrexpr.IndexOf(acfinder);
int isecond = astrexpr.Substring(ifirst + 1).IndexOf(acfinder);
return ifirst + isecond + 1;
}//FindSecondChar
private static void NbOfChar(string astrexpr, char acfinder)
{
int i = astrexpr.IndexOf(acfinder);
if(i >= 0)
{
m_iCharContor+=1;
NbOfChar(astrexpr.Substring(i+1),acfinder);
}
}//NbOfChar
private static void EvalAritm(string astrexpr)
{
ProcessPercent(astrexpr);
string strwithoutpercent = m_strservice;
ProcessDivision(strwithoutpercent);
string strwithoutdivision = m_strservice;
ProcessMultiply(strwithoutdivision);
string strwithoutmultiply = m_strservice;
ProcessMinus(strwithoutmultiply);
string strwithoutminus = m_strservice;
ProcessPlus(strwithoutminus);
string strwithoutplus = m_strservice;
}//EvalAritm
private static void ProcessPercent(string astrexpr)
{
m_iCharContor = 0;
NbOfChar(astrexpr,'%');
int inbpercent = m_iCharContor;
string strnewastrexpr = astrexpr.Trim();
m_iCharContor = 0;
NbOfChar(strnewastrexpr, '%');
if(m_iCharContor == 0)
{
m_strservice = strnewastrexpr;
}
if(inbpercent > 0)
{
string astrexprwithoutbreak = astrexpr.Trim();
int ipospercent = FindFirstChar(astrexprwithoutbreak,'%');
string astrwithoutpercent;
if (ipospercent >= 1)
{
astrwithoutpercent = astrexprwithoutbreak.Substring(0,ipospercent);
}
else
{
throw new Exception("Sintax error!");
}
int ilastdivision = FindLastChar(astrwithoutpercent,'/');
int ilastmultiply = FindLastChar(astrwithoutpercent,'*');
int ilastminus = FindLastChar(astrwithoutpercent,'-');
int ilastplus = FindLastChar(astrwithoutpercent,'+');
ArrayList arlsigns = new ArrayList();
arlsigns.Add(ilastdivision);
arlsigns.Add(ilastmultiply);
arlsigns.Add(ilastminus);
arlsigns.Add(ilastplus);
int imaxsignpos = NbMax(arlsigns);
if(imaxsignpos < 0) imaxsignpos = 0;
string strpercent;
string strbeforepercent;
if(imaxsignpos >= 1)
{
strpercent = astrwithoutpercent.Substring(imaxsignpos + 1).Trim();
strbeforepercent = astrwithoutpercent.Substring(0,imaxsignpos+1).Trim();
}
else
{
strpercent = astrwithoutpercent.Trim();
strbeforepercent = "";
}
string strafterpercent="";
if(ipospercent < astrexprwithoutbreak.Length - 1)
{
strafterpercent = astrexprwithoutbreak.Substring(ipospercent+1).Trim();
}
decimal dpercentvalue = ConvertToValue(strpercent);
strnewastrexpr = strbeforepercent + Convert.ToString(dpercentvalue) + strafterpercent;
ProcessPercent(strnewastrexpr);
}
}//ProcessPercent
private static void ProcessDivision(string astrexpr)
{
m_iCharContor = 0;
NbOfChar(astrexpr,'/');
int inbdivision = m_iCharContor;
string strnewastrexpr = astrexpr.Trim();
m_iCharContor = 0;
NbOfChar(strnewastrexpr, '/');
if(m_iCharContor == 0)
{
m_strservice = strnewastrexpr;
}
if(inbdivision > 0)
{
string astrexprwithoutbreak = astrexpr.Trim();
int iposdivision = FindFirstChar(astrexprwithoutbreak,'/');
string astrbeforedivision;
if (iposdivision >= 1)
{
astrbeforedivision = astrexprwithoutbreak.Substring(0,iposdivision).Trim();
}
else
{
throw new Exception("Division error!");
}
string astrafterdivision;
if(iposdivision < astrexprwithoutbreak.Length - 1)
{
astrafterdivision = astrexprwithoutbreak.Substring(iposdivision + 1).Trim();
}
else
{
throw new Exception("Division error!");
}
int ilastdivisionbefore = FindLastChar(astrbeforedivision,'/');
int ilastmultiplybefore = FindLastChar(astrbeforedivision,'*');
int ilastminusbefore = FindLastChar(astrbeforedivision,'-');
int ilastplusbefore = FindLastChar(astrbeforedivision,'+');
int ilastdivisionafter = FindFirstChar(astrafterdivision,'/');
int ilastmultiplyafter = FindFirstChar(astrafterdivision,'*');
int ilastminusafter = FindFirstChar(astrafterdivision,'-');
int ilastplusafter = FindFirstChar(astrafterdivision,'+');
ArrayList arlsignsbefore = new ArrayList();
arlsignsbefore.Add(ilastdivisionbefore);
arlsignsbefore.Add(ilastmultiplybefore);
arlsignsbefore.Add(ilastminusbefore);
arlsignsbefore.Add(ilastplusbefore);
int imaxsignpos = NbMax(arlsignsbefore);
if (imaxsignpos <= 0) imaxsignpos = -1;
ArrayList arlsignsafter = new ArrayList();
arlsignsafter.Add(ilastdivisionafter);
arlsignsafter.Add(ilastmultiplyafter);
arlsignsafter.Add(ilastminusafter);
arlsignsafter.Add(ilastplusafter);
int iminsignpos = NbMin(arlsignsafter);
if (iminsignpos <= 0) iminsignpos = 0;
string strbeforedivisionafter = astrbeforedivision.Substring(imaxsignpos + 1).Trim();
string strbeforedivisionbefore = astrbeforedivision.Substring(0,imaxsignpos + 1).Trim();
string strafterdivisionbefore = astrafterdivision.Substring(0,iminsignpos).Trim();
string strafterdivisionafter = astrafterdivision.Substring(iminsignpos).Trim();
bool issignbefore = false;
if(strbeforedivisionbefore.Length > 0)
{
if(strbeforedivisionbefore.Substring(0,1).Trim() == "-")
{
issignbefore = true;
}
}
bool issignafter = false;
if(strafterdivisionbefore.Length > 0)
{
if(strafterdivisionbefore.Substring(0,1).Trim() == "-")
{
issignafter = true;
}
}
decimal dbeforedivision;
if(strbeforedivisionafter.Length > 0)
{
dbeforedivision = Convert.ToDecimal(SetDecimalSeparator(strbeforedivisionafter));
}
else if(strbeforedivisionbefore.Length > 0)
{
dbeforedivision = Convert.ToDecimal(SetDecimalSeparator(strbeforedivisionbefore));
}
else dbeforedivision = 0;
decimal dafterdivision;
if(strafterdivisionbefore.Length > 0)
{
dafterdivision = Convert.ToDecimal(SetDecimalSeparator(strafterdivisionbefore));
}
else if(strafterdivisionafter.Length > 0)
{
dafterdivision = Convert.ToDecimal(SetDecimalSeparator(strafterdivisionafter));
}
else dafterdivision = 1;
decimal ddivision=0;
if(dafterdivision != 0)
{
if(issignbefore || issignafter)
{
ddivision = (-1) * dbeforedivision / dafterdivision;
}
else ddivision = dbeforedivision / dafterdivision;
}
strnewastrexpr = strbeforedivisionbefore + Convert.ToString(ddivision) + strafterdivisionafter;
if(strafterdivisionbefore == "") strnewastrexpr = strbeforedivisionbefore + Convert.ToString(ddivision);
ProcessDivision(strnewastrexpr);
}
}//ProcessDivision
private static void ProcessMultiply(string astrexpr)
{
m_iCharContor = 0;
NbOfChar(astrexpr,'*');
int inbmultiply = m_iCharContor;
string strnewastrexpr = astrexpr.Trim();
m_iCharContor = 0;
NbOfChar(strnewastrexpr, '*');
if(m_iCharContor == 0)
{
m_strservice = strnewastrexpr;
}
if(inbmultiply > 0)
{
string astrexprwithoutbreak = astrexpr.Trim();
int iposmultiply = FindFirstChar(astrexprwithoutbreak,'*');
string astrbeforemultiply;
if (iposmultiply >= 1)
{
astrbeforemultiply = astrexprwithoutbreak.Substring(0,iposmultiply).Trim();
}
else
{
throw new Exception("Error!");
}
string astraftermultiply;
if(iposmultiply < astrexprwithoutbreak.Length - 1)
{
astraftermultiply = astrexprwithoutbreak.Substring(iposmultiply + 1).Trim();
}
else
{
throw new Exception("Error!");
}
int ilastdivisionbefore = FindLastChar(astrbeforemultiply,'/');
int ilastmultiplybefore = FindLastChar(astrbeforemultiply,'*');
int ilastminusbefore = FindLastChar(astrbeforemultiply,'-');
int ilastplusbefore = FindLastChar(astrbeforemultiply,'+');
int ilastdivisionafter = FindFirstChar(astraftermultiply,'/');
int ilastmultiplyafter = FindFirstChar(astraftermultiply,'*');
int ilastminusafter = FindFirstChar(astraftermultiply,'-');
int ilastplusafter = FindFirstChar(astraftermultiply,'+');
ArrayList arlsignsbefore = new ArrayList();
arlsignsbefore.Add(ilastdivisionbefore);
arlsignsbefore.Add(ilastmultiplybefore);
arlsignsbefore.Add(ilastminusbefore);
arlsignsbefore.Add(ilastplusbefore);
int imaxsignpos = NbMax(arlsignsbefore);
if (imaxsignpos <= 0) imaxsignpos = -1;
ArrayList arlsignsafter = new ArrayList();
arlsignsafter.Add(ilastdivisionafter);
arlsignsafter.Add(ilastmultiplyafter);
arlsignsafter.Add(ilastminusafter);
arlsignsafter.Add(ilastplusafter);
int iminsignpos = NbMin(arlsignsafter);
if (iminsignpos <= 0) iminsignpos = 0;
string strbeforemultiplyafter = astrbeforemultiply.Substring(imaxsignpos + 1).Trim();
string strbeforemultiplybefore = astrbeforemultiply.Substring(0,imaxsignpos + 1).Trim();
string straftermultiplybefore = astraftermultiply.Substring(0,iminsignpos).Trim();
string straftermultiplyafter = astraftermultiply.Substring(iminsignpos).Trim();
bool issignbefore = false;
if(strbeforemultiplybefore.Length > 0)
{
if(strbeforemultiplybefore.Substring(0,1).Trim() == "-")
{
//issignbefore = true;
}
}
bool issignafter = false;
if(straftermultiplybefore.Length > 0)
{
if(straftermultiplybefore.Substring(0,1).Trim() == "-")
{
issignafter = true;
}
}
decimal dbeforemultiply;
if(strbeforemultiplyafter.Length > 0)
{
if(IsDigit(strbeforemultiplyafter) == true)
{
dbeforemultiply = Convert.ToDecimal(SetDecimalSeparator(strbeforemultiplyafter));
}
else
{
dbeforemultiply = ConvertToValue(strbeforemultiplyafter);
}
}
else if(strbeforemultiplybefore.Length > 0)
{
if(IsDigit(strbeforemultiplybefore) == true)
{
dbeforemultiply = Convert.ToDecimal(SetDecimalSeparator(strbeforemultiplybefore));
}
else
{
dbeforemultiply = ConvertToValue(strbeforemultiplybefore);
}
}
else dbeforemultiply = 0;
decimal daftermultiply;
if(straftermultiplybefore.Length > 0)
{
if(IsDigit(straftermultiplybefore) == true)
{
daftermultiply = Convert.ToDecimal(SetDecimalSeparator(straftermultiplybefore));
}
else
{
daftermultiply = ConvertToValue(straftermultiplybefore);
}
}
else if(straftermultiplyafter.Length > 0)
{
if(IsDigit(straftermultiplyafter) == true)
{
daftermultiply = Convert.ToDecimal(SetDecimalSeparator(straftermultiplyafter));
}
else
{
daftermultiply = ConvertToValue(straftermultiplyafter);
}
}
else daftermultiply = 0;
decimal dmultiply=0;
if(daftermultiply != 0)
{
if(issignbefore || issignafter)
{
dmultiply = (-1) * dbeforemultiply * daftermultiply;
}
else dmultiply = dbeforemultiply * daftermultiply;
}
strnewastrexpr = strbeforemultiplybefore + Convert.ToString(dmultiply) + straftermultiplyafter;
if(straftermultiplybefore == "") strnewastrexpr = strbeforemultiplybefore + Convert.ToString(dmultiply);
ProcessMultiply(strnewastrexpr);
}
}//ProcessMultiply
private static void ProcessMinus(string astrexpr)
{
m_iCharContor = 0;
NbOfChar(astrexpr,'-');
int iposminustest = FindFirstChar(astrexpr.Trim(),'-');
//if(iposminustest == 0) iposminustest = this.FindSecondChar(astrexpr.Trim(),'-');
string strnewastrexpr = astrexpr.Trim();
m_iCharContor = 0;
NbOfChar(strnewastrexpr, '-');
if(iposminustest == 0)m_iCharContor -= 1;
int inbminus = m_iCharContor;
if(m_iCharContor == 0)
{
m_strservice = strnewastrexpr;
}
if(inbminus > 0)
{
string astrexprwithoutbreak = astrexpr.Trim();
//if(iposminustest == 0) astrexprwithoutbreak = astrexprwithoutbreak.Substring(1);
int iposminus = FindFirstChar(astrexprwithoutbreak,'-');
if (iposminus == 0)iposminus = FindSecondChar(astrexprwithoutbreak,'-');
string astrbeforeminus;
if (iposminus >= 1)
{
astrbeforeminus = astrexprwithoutbreak.Substring(0,iposminus).Trim();
}
else
{
astrbeforeminus = astrexprwithoutbreak.Substring(0,iposminus).Trim();
}
string astrafterminus;
if(iposminus < astrexprwithoutbreak.Length - 1)
{
astrafterminus = astrexprwithoutbreak.Substring(iposminus + 1).Trim();
//if(iposminustest == 0)astrafterminus = astrafterminus.Substring(1).Trim();
}
else
{
throw new Exception("Error!");
}
int ilastdivisionbefore = FindLastChar(astrbeforeminus,'/');
int ilastmultiplybefore = FindLastChar(astrbeforeminus,'*');
int ilastminusbefore = FindLastChar(astrbeforeminus,'-');
int ilastplusbefore = FindLastChar(astrbeforeminus,'+');
int ilastdivisionafter = FindFirstChar(astrafterminus,'/');
int ilastmultiplyafter = FindFirstChar(astrafterminus,'*');
int ilastminusafter = FindFirstChar(astrafterminus,'-');
int ilastplusafter = FindFirstChar(astrafterminus,'+');
ArrayList arlsignsbefore = new ArrayList();
arlsignsbefore.Add(ilastdivisionbefore);
arlsignsbefore.Add(ilastmultiplybefore);
arlsignsbefore.Add(ilastminusbefore);
arlsignsbefore.Add(ilastplusbefore);
int imaxsignpos = NbMax(arlsignsbefore);
if (imaxsignpos <= 0) imaxsignpos = -1;
ArrayList arlsignsafter = new ArrayList();
arlsignsafter.Add(ilastdivisionafter);
arlsignsafter.Add(ilastmultiplyafter);
arlsignsafter.Add(ilastminusafter);
arlsignsafter.Add(ilastplusafter);
int iminsignpos = NbMin(arlsignsafter);
if (iminsignpos <= 0) iminsignpos = 0;
string strbeforeminusafter = astrbeforeminus.Substring(imaxsignpos + 1).Trim();
string strbeforeminusbefore = astrbeforeminus.Substring(0,imaxsignpos + 1).Trim();
string strafterminusbefore = astrafterminus.Substring(0,iminsignpos).Trim();
string strafterminusafter = astrafterminus.Substring(iminsignpos).Trim();
decimal dbeforeminus = 0;
if(strbeforeminusafter.Length > 0)
{
if(IsDigit(strbeforeminusafter) == true)
{
dbeforeminus = Convert.ToDecimal(SetDecimalSeparator(strbeforeminusafter));
}
else
{
dbeforeminus = ConvertToValue(strbeforeminusafter);
}
}
else if(strbeforeminusbefore.Length > 0)
{
if(IsDigit(strbeforeminusbefore) == true)
{
dbeforeminus = Convert.ToDecimal(SetDecimalSeparator(strbeforeminusbefore));
}
else
{
dbeforeminus = ConvertToValue(strbeforeminusbefore);
}
}
decimal dafterminus = 0;
if(strafterminusbefore.Length > 0)
{
if(IsDigit(strafterminusbefore))
{
dafterminus = Convert.ToDecimal(SetDecimalSeparator(strafterminusbefore));
}
else
{
dafterminus = ConvertToValue(strafterminusbefore);
}
}
else if(strafterminusafter.Length > 0)
{
if(IsDigit(strafterminusafter))
{
dafterminus = Convert.ToDecimal(SetDecimalSeparator(strafterminusafter));
}
else
{
dafterminus = ConvertToValue(strafterminusafter);
}
}
decimal dminus=0;
dminus = dbeforeminus - dafterminus;
strnewastrexpr = strbeforeminusbefore + Convert.ToString(dminus) + strafterminusafter;
if(strafterminusbefore == "") strnewastrexpr = strbeforeminusbefore + Convert.ToString(dminus);
ProcessMinus(strnewastrexpr);
}
}//ProcessMinus
private static void ProcessPlus(string astrexpr)
{
m_iCharContor = 0;
NbOfChar(astrexpr,'+');
int inbplus = m_iCharContor;
string strnewastrexpr = astrexpr.Trim();
m_iCharContor = 0;
NbOfChar(strnewastrexpr, '+');
if(m_iCharContor == 0)
{
m_strservice = strnewastrexpr;
}
if(inbplus > 0)
{
string astrexprwithoutbreak = astrexpr.Trim();
int iposplus = FindFirstChar(astrexprwithoutbreak,'+');
string astrbeforeplus;
if (iposplus >= 1)
{
astrbeforeplus = astrexprwithoutbreak.Substring(0,iposplus).Trim();
}
else
{
throw new Exception("Error!");
}
string astrafterplus;
if(iposplus < astrexprwithoutbreak.Length - 1)
{
astrafterplus = astrexprwithoutbreak.Substring(iposplus + 1).Trim();
}
else
{
throw new Exception("Error!");
}
int ilastdivisionbefore = FindLastChar(astrbeforeplus,'/');
int ilastmultiplybefore = FindLastChar(astrbeforeplus,'*');
int ilastminusbefore = FindLastChar(astrbeforeplus,'-');
int ilastplusbefore = FindLastChar(astrbeforeplus,'+');
int ilastdivisionafter = FindFirstChar(astrafterplus,'/');
int ilastmultiplyafter = FindFirstChar(astrafterplus,'*');
int ilastminusafter = FindFirstChar(astrafterplus,'-');
int ilastplusafter = FindFirstChar(astrafterplus,'+');
ArrayList arlsignsbefore = new ArrayList();
arlsignsbefore.Add(ilastdivisionbefore);
arlsignsbefore.Add(ilastmultiplybefore);
arlsignsbefore.Add(ilastminusbefore);
arlsignsbefore.Add(ilastplusbefore);
int imaxsignpos = NbMax(arlsignsbefore);
if (imaxsignpos <= 0) imaxsignpos = -1;
ArrayList arlsignsafter = new ArrayList();
arlsignsafter.Add(ilastdivisionafter);
arlsignsafter.Add(ilastmultiplyafter);
arlsignsafter.Add(ilastminusafter);
arlsignsafter.Add(ilastplusafter);
int iminsignpos = NbMin(arlsignsafter);
if (iminsignpos <= 0) iminsignpos = 0;
string strbeforeplusafter = astrbeforeplus.Substring(imaxsignpos + 1).Trim();
string strbeforeplusbefore = astrbeforeplus.Substring(0,imaxsignpos + 1).Trim();
string strafterplusbefore = astrafterplus.Substring(0,iminsignpos).Trim();
string strafterplusafter = astrafterplus.Substring(iminsignpos).Trim();
decimal dbeforeplus = 0;
if(strbeforeplusafter.Length > 0)
{
if(IsDigit(strbeforeplusafter) == true)
{
dbeforeplus = Convert.ToDecimal(SetDecimalSeparator(strbeforeplusafter));
}
else
{
dbeforeplus = ConvertToValue(strbeforeplusafter);
}
}
else if(strbeforeplusbefore.Length > 0)
{
if(IsDigit(strbeforeplusbefore) == true)
{
dbeforeplus = Convert.ToDecimal(SetDecimalSeparator(strbeforeplusbefore));
}
else
{
dbeforeplus = ConvertToValue(strbeforeplusbefore);
}
}
decimal dafterplus = 0;
if(strafterplusbefore.Length > 0)
{
if(IsDigit(strafterplusbefore) == true)
{
dafterplus = Convert.ToDecimal(SetDecimalSeparator(strafterplusbefore));
}
else
{
dafterplus = ConvertToValue(strafterplusbefore);
}
}
else if(strafterplusafter.Length > 0)
{
if(IsDigit(strafterplusafter) == true)
{
dafterplus = Convert.ToDecimal(SetDecimalSeparator(strafterplusafter));
}
else
{
dafterplus = ConvertToValue(strafterplusafter);
}
}
decimal dplus=0;
dplus = dbeforeplus + dafterplus;
strnewastrexpr = strbeforeplusbefore + Convert.ToString(dplus) + strafterplusafter;
if(strafterplusbefore == "") strnewastrexpr = strbeforeplusbefore + Convert.ToString(dplus);
ProcessPlus(strnewastrexpr);
}
else
{
if(IsDigit(astrexpr) == false)
{
ConvertToValue(astrexpr);
}
}
}//ProcessPlus
private static decimal ConvertToValue(string astrexpr)
{
bool bmarker = true;
decimal dexpr = 0;
for(int i=0;i <= astrexpr.Length - 1;i++)
{
string strlocal = astrexpr.Substring(i,1);
if ((i != 0) || (strlocal != "-"))
{
char[] ch = strlocal.ToCharArray();
if((Char.IsDigit(ch[0]) == false) && (strlocal != ".") && (strlocal != ",") /*&& (strlocal != " ")*/)
{
bmarker = false;
}
}
}
if(bmarker == true)
{
dexpr = Convert.ToDecimal(astrexpr)/100;
}
else
{
throw new Exception("Not numeric value!");
}
return dexpr;
}//ConvertToValue
private static int NbMax(ArrayList aobjarl)
{
int max = 0;
foreach(object obj in aobjarl)
{
if((int)obj != -1)
{
if(max <= (int)obj) max = (int)obj;
}
}
return max;
}//NbMax
private static int NbMin(ArrayList aobjarl)
{
int min = NbMax(aobjarl);
foreach(object obj in aobjarl)
{
if((int)obj != -1)
{
if(min >= (int)obj) min = (int)obj;
}
}
return min;
}//NbMin
private static bool IsDigit(string astrexpr)
{
foreach(char ch in astrexpr.ToCharArray())
{
if((ch != '-')&&(ch != ' ')&&(ch != '.')&&(ch != ','))
{
if (Char.IsDigit(ch) == false)
{
return false;
}
}
}
return true;
}//IsDigit
private static string SetDecimalSeparator(string astrexpr)
{
string strseparator = NumberFormatInfo.CurrentInfo.NumberDecimalSeparator;
int ipoint = astrexpr.IndexOf('.');
int icomma = astrexpr.IndexOf(',');
string newastrexpr;
if(ipoint >= 0)
{
newastrexpr = astrexpr.Replace(".",strseparator);
}
else if(icomma >= 0)
{
newastrexpr = astrexpr.Replace(",",strseparator);
}
else
{
newastrexpr = astrexpr;
}
return newastrexpr;
}//SetDecimalSeparator
private static int m_iCharContor = 0;
private static string m_strservice = "";
private static double m_iNbOfMinus = 0;
private static string m_strExpression;
#endregion private members
} |
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