18位身份證c#原始碼

private  string  CheckCidInfo(string  cid)
{
string[]  aCity  =  new  string[]{null,null,null,null,null,null,null,null,null,null,null,"北京","天津","河北","山西","內蒙古",null,null,null,null,null,"遼寧","吉林","黑龍江",null,null,null,null,null,null,null,"上海","江蘇","浙江","安微","福建","江西","山東",null,null,null,"河南","湖北","湖南","廣東","廣西","海南",null,null,null,"重慶","四川","貴州","雲南","西藏",null,null,null,null,null,null,"陝西","甘肅","青海","寧夏","新疆",null,null,null,null,null,"台灣",null,null,null,null,null,null,null,null,null,"香港","澳門",null,null,null,null,null,null,null,null,"國外"};
double  iSum=0;
string  info="";
System.Text.RegularExpressions.Regex  rg  =  new  System.Text.RegularExpressions.Regex(@"^\d{17}(\d|x)$");
System.Text.RegularExpressions.Match  mc  =  rg.Match(cid);
if(!mc.Success)
{
return  "";
}     
cid  =  cid.ToLower();
cid  =  cid.Replace("x","a");
if(aCity[int.Parse(cid.Substring(0,2))]==null)
{
return  "非法地區";
}
try
{
DateTime.Parse(cid.Substring(6,4)+"-"+cid.Substring(10,2)+"-"+cid.Substring(12,2));
}
catch
{
return  "非法生日";
}
for(int  i=17;i>=0;i--)
{       
iSum  +=(System.Math.Pow(2,i)%11)*int.Parse(cid[17-i].ToString(),System.Globalization.NumberStyles.HexNumber);
}
if(iSum%11!=1)
return("非法證號");
   
return(aCity[int.Parse(cid.Substring(0,2))]+","+cid.Substring(6,4)+"-"+cid.Substring(10,2)+"-"+cid.Substring(12,2)+","+(int.Parse(cid.Substring(16,1))%2==1?"男":"女"));
 
}
全封裝好的!!!複製到c#就可以用