#region 是否合法的中国身份证号码
protected bool IsChineseID(string str)
{
	if (str.Length == 15)
		str = CidUpdate(str);
	if (str.Length == 18)
	{
		string strResult = CheckCidInfo(str);
		if (strResult == "非法地区" || strResult == "非法生日" || strResult == "非法证号")
			return false;
		else
			return true;
	}
	else
		return false;
}
#endregion

#region 中国身份证号码验证
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", "内蒙古", null, null, null, null, null, "辽宁", "吉林", "黑龙江", null, null, null, null, null, null, null, "上海", "江苏", "浙江", "安微", "福建", "江西", "山东", null, null, null, "河南", "湖北", "湖南", "广东", "广西", "海南", null, null, null, "重庆", "四川", "贵州", "云南", "西藏", null, null, null, null, null, null, "陕西", "甘肃", "青海", "宁夏", "新疆", null, null, null, null, null, "台湾", null, null, null, null, null, null, null, null, null, "香港", "澳门", null, null, null, null, null, null, null, null, "国外" };
	double iSum = 0;
	string info = string.Empty;
	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 string.Empty;
	cid = cid.ToLower();
	cid = cid.Replace("x", "a");
	if (aCity[int.Parse(cid.Substring(0, 2))] == null)
		return "非法地区";
	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 ("非法证号");
	else
		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"));
}
#endregion

#region 身份证号码15升级为18位
private string CidUpdate(string ShortCid)
{
	char[] strJiaoYan = { '1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2' };
	int[] intQuan = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1 };
	string strTemp;
	int intTemp = 0;
	strTemp = ShortCid.Substring(0, 6) + "19" + ShortCid.Substring(6);
	for (int i = 0; i <= strTemp.Length - 1; i++)
	{
		intTemp += int.Parse(strTemp.Substring(i, 1)) * intQuan[i];
	}
	intTemp = intTemp % 11;
	return strTemp + strJiaoYan[intTemp];
}
#endregion
身份证 最后修改于 2015-06-16 17:18:17
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