As shown in the picture above, it is the result of the ID card being hidden, and the middle digits are hidden as * signs.
When we usually display the ID card to the user on the web page, it usually cannot be displayed to the user to prevent others from stealing the user's information after maliciously logging in
Here's how:
- /// <summary>
- /// 隐藏身份证号码
- /// </summary>
- /// <param name="card"></param>
- /// <returns></returns>
- public static string IDCardHide(string card)
- {
- string temp = null;
- if (card.Length == 18)
- {
- temp = card.Substring(0, 5) + "***********" + card.Substring(16, 2);
- }
- if (card.Length == 15)
- {
- temp = card.Substring(0, 4) + "********" + card.Substring(12, 3);
- }
- return temp;
- }
- /// <summary>
- /// 验证身份证合理性
- /// </summary>
- /// <param name="Id"></param>
- /// <returns></returns>
- public static bool CheckIDCard(string idNumber)
- {
- if (idNumber.Length == 18)
- {
- bool check = CheckIDCard18(idNumber);
- return check;
- }
- else if (idNumber.Length == 15)
- {
- bool check = CheckIDCard15(idNumber);
- return check;
- }
- else
- {
- return false;
- }
- }
- /// <summary>
- /// 18位身份证号码验证
- /// </summary>
- private static bool CheckIDCard18(string idNumber)
- {
- long n = 0;
- if (long.TryParse(idNumber.Remove(17), out n) == false
- || n < Math.Pow(10, 16) || long.TryParse(idNumber.Replace('x', '0').Replace('X', '0'), out n) == false)
- {
- return false;//数字验证
- }
- string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
- if (address.IndexOf(idNumber.Remove(2)) == -1)
- {
- return false;//省份验证
- }
- string birth = idNumber.Substring(6, 8).Insert(6, "-").Insert(4, "-");
- DateTime time = new DateTime();
- if (DateTime.TryParse(birth, out time) == false)
- {
- return false;//生日验证
- }
- 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(',');
- char[] Ai = idNumber.Remove(17).ToCharArray();
- int sum = 0;
- for (int i = 0; i < 17; i++)
- {
- sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());
- }
- int y = -1;
- Math.DivRem(sum, 11, out y);
- if (arrVarifyCode[y] != idNumber.Substring(17, 1).ToLower())
- {
- return false;//校验码验证
- }
- return true;//符合GB11643-1999标准
- }
- /// <summary>
- /// 16位身份证号码验证
- /// </summary>
- private static bool CheckIDCard15(string idNumber)
- {
- long n = 0;
- if (long.TryParse(idNumber, out n) == false || n < Math.Pow(10, 14))
- {
- return false;//数字验证
- }
- string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
- if (address.IndexOf(idNumber.Remove(2)) == -1)
- {
- return false;//省份验证
- }
- string birth = idNumber.Substring(6, 6).Insert(4, "-").Insert(2, "-");
- DateTime time = new DateTime();
- if (DateTime.TryParse(birth, out time) == false)
- {
- return false;//生日验证
- }
- return true;
- }
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