private bool CheckIDCard_CHS(string IDCard)
{
string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(’,’);
string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(’,’);
string[] Checker = ("1,9,8,7,6,5,4,3,2,1,1").Split(’,’);
int intLength = IDCard.Length;

int i = 0, TotalmulAiWi = 0;
int modValue = 0;
string strVerifyCode = "";
string Ai = "";
string BirthDay = "";
int intYear = 0;
int intMonth = 0;
int intDay = 0;

if (intLength != 18)
{
return false;
}
if (intLength == 18)
{
Ai = IDCard.Substring(0, 17);
}
else if (intLength == 15)
{
Ai = IDCard;
Ai = Ai.Substring(0, 6) + "19" + Ai.Substring(6, 9);
}
if (!IsNumeric(Ai)) return false;

intYear = Convert.ToInt32(Ai.Substring(6, 4));
intMonth = Convert.ToInt32(Ai.Substring(10, 2));
intDay = Convert.ToInt32(Ai.Substring(12, 2));

BirthDay = intYear.ToString() + "-" + intMonth.ToString() + "-" + intDay.ToString();
if (IsDateTime(BirthDay))
{
DateTime DateBirthDay = DateTime.Parse(BirthDay);
if (DateBirthDay > DateTime.Now)
{
return false;
}

int intYearLength = DateBirthDay.Year - DateBirthDay.Year;
if (intYearLength < -140)
{
return false;
}
}

if (intMonth > 12 　　 intDay > 31)
{
return false;
}

for (i = 0; i < 17; i++)
{
TotalmulAiWi = TotalmulAiWi + (Convert.ToInt32(Ai.Substring(i, 1)) * Convert.ToInt32(Wi[i].ToString()));
}
modValue = TotalmulAiWi % 11;

strVerifyCode = arrVarifyCode[modValue].ToString();
Ai = Ai + strVerifyCode;
if (intLength == 18 && IDCard != Ai)
{
return false;
}
return true;
}
/**////
/// 判斷字符串是否可轉換為DateTime
///
/// 要判斷的字符串
/// true=可以轉換;false=無法轉換
private bool IsDateTime(string s)
{
try
{
System.DateTime.Parse(s);
}
catch
{
return false;
}
return true;
}

/**////
/// 判斷字符串是否可以轉換為數字
///
/// 要判斷的字符串
/// true=可以轉換;false=無法轉換
private bool IsNumeric(object value)
{
try
{
double i = Convert.ToDouble(value.ToString());
return true;
}
catch (FormatException)
{
return false;
}
}