C# 常用类库（字符串处理，汉字首字母拼音，注入攻击，缓存操作，Cookies操作，AES加密等）
记录下字符串类库，方便今后查阅
主要包含了字符串解决，去除HTML，SQL注入攻击检测，IP地址处理，Cookies操作，根据身份证获取性别、姓名、年龄等等
代码如下：
using System;
using System.Collections.Generic;
using System.Web;
using System.Collections;
using System.Text;
using System.Text.RegularExpressions;
using System.Data;
using System.Drawing;
using ZXing;
using System.Xml;
namespace Hplus.Common
{
public class CommonMethod
{
public static bool IsPhone(string Phone)
{
return System.Text.RegularExpressions.Regex.IsMatch(Phone, @"^[1]+[3,5,4,7,8]+\d{9}");
}
/// <summary>
/// 判断是否是汉字
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public static bool CheckStringChinese(string text)
{
bool res = false;
foreach (char t in text)
{
if ((int)t > 127)
res = true;
}
return res;
}
#region 截取字符长度 static string CutString(string str, int len)
/// <summary>
/// 截取字符长度
/// </summary>
/// <param name="str">被截取的字符串</param>
/// <param name="len">所截取的长度</param>
/// <returns>子字符串</returns>
public static string CutString(string str, int len)
{
if (str == null || str.Length == 0 || len <= 0)
{
return string.Empty;
}
int l = str.Length;
#region 计算长度
int clen = 0;
while (clen < len && clen < l)
{
//每遇到一个中文，则将目标长度减一。
if ((int)str[clen] > 128) { len--; }
clen++;
}
#endregion
if (clen < l)
{
return str.Substring(0, clen) + "...";
}
else
{
return str;
}
}
/// <summary>
/// //截取字符串中文 字母
/// </summary>
/// <param name="content">源字符串</param>
/// <param name="length">截取长度！</param>
/// <returns></returns>
public static string SubTrueString(object content, int length)
{
string strContent = NoHTML(content.ToString());
bool isConvert = false;
int splitLength = 0;
int currLength = 0;
int code = 0;
int chfrom = Convert.ToInt32("4e00", 16); //范围（0x4e00～0x9fff）转换成int（chfrom～chend）
int chend = Convert.ToInt32("9fff", 16);
for (int i = 0; i < strContent.Length; i++)
{
code = Char.ConvertToUtf32(strContent, i);
if (code >= chfrom && code <= chend)
{
currLength += 2; //中文
}
else
{
currLength += 1;//非中文
}
splitLength = i + 1;
if (currLength >= length)
{
isConvert = true;
break;
}
}
if (isConvert)
{
return strContent.Substring(0, splitLength);
}
else
{
return strContent;
}
}
#endregion
#region /*产生验证码*/ GetCode(int codeLength)
/// <summary>
/// 生成一个1到10000000之间的正整数
/// </summary>
/// <returns></returns>
public static int GetNums()
{
int a = new Random().Next(1, 100000000);
return a;
}
/// <summary>
/// 产生验证码
/// </summary>
/// <param name="codeLength">获取的验证码长度</param>
/// <returns>验证码</returns>
public static string GetCode(int codeLength)
{
string so = "1,2,3,4,5,6,7,8,9,0,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";
string[] strArr = so.Split(',');
string code = "";
Random rand = new Random();
for (int i = 0; i < codeLength; i++)
{
code += strArr[rand.Next(0, strArr.Length)];
}
return code;
}
/// <summary>
/// 获取一个随机字符串
/// </summary>
/// <param name="count"></param>
/// <returns></returns>
public static string GetRandomChar(int count)
{
string[] s = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z",
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
StringBuilder sb = new StringBuilder();
Random ran = new Random();
for (int i = 0; i < count; i++)
{
int temp = ran.Next(s.Length);
sb.Append(s[temp]);
}
return sb.ToString();
}
/// <summary>
/// 获取特定位数的随机数
/// </summary>
/// <param name="count"></param>
/// <returns></returns>
public static string GetRandomNums(int count)
{
StringBuilder sb = new StringBuilder();
sb.Append('9', count - 1);
int min = int.Parse(sb.ToString()) + 1;//最小值
sb.Append(9);
int max = int.Parse(sb.ToString());//最大值
Random ran = new Random();
return ran.Next(min, max).ToString();
}
/// <summary>
/// //获取18位订单编号
/// </summary>
/// <returns></returns>
public static string GetOrderNum()
{
Random ran = new Random();
int random = ran.Next(9999);//四位随机数
string dateStr = DateTime.Now.ToString("yyyyMMddhhmmss");
return "order" + dateStr + CovertIntToString(random, 4);
}
/// <summary>
/// 获取支付编号
/// </summary>
/// <returns></returns>
public static string GetPayNum()
{
Random ran = new Random();
int random1 = ran.Next(9999);//四位随机数
string dateStr = DateTime.Now.ToString("yyyyMMddhhmmss");
int random2 = ran.Next(9999);//四位随机数
return CovertIntToString(random1, 4) + dateStr + CovertIntToString(random2, 4);
}
public static string GetShopNum()
{
Random ran = new Random();
int random = ran.Next(9999);//四位随机数
string dateStr = DateTime.Now.ToString("yyyyMMddhhmmss");
return "shop-" + dateStr + CovertIntToString(random, 4);
}
/// <summary>
/// //获取17位活动编号
/// </summary>
/// <returns></returns>
public static string GetHuoDongNum()
{
Random ran = new Random();
int random = ran.Next(9999);//四位随机数
string dateStr = DateTime.Now.ToString("yyyyMMddhhmmss");
return "ACT" + dateStr + CovertIntToString(random, 4);
}
/// <summary>
/// //获取购物车产品流水号
/// </summary>
/// <returns></returns>
public static string GetCartNum()
{
Random ran = new Random();
int random = ran.Next(9999);//四位随机数
string dateStr = DateTime.Now.ToString("yyyyMMddhhmmss");
return "ddpcart" + dateStr + CovertIntToString(random, 4);
}
/// <summary>
/// //获取会员唯一编号
/// </summary>
/// <returns></returns>
public static string GetVIPNum()
{
Random ran = new Random();
int random = ran.Next(9999);//四位随机数
string dateStr = DateTime.Now.ToString("yyyyMMddhhmmss");
return "VIP" + dateStr + CovertIntToString(random, 6);
}
/// <summary>
/// 长度不够补0
/// </summary>
/// <param name="src"></param>
/// <param name="num"></param>
/// <returns></returns>
public static string CovertIntToString(object src, int num)
{
StringBuilder sb = new StringBuilder();
sb.Append('0', num);
string sTarget = sb.ToString() + src.ToString();
return sTarget.Substring(sTarget.Length - num, num);
}
private static double EARTH_RADIUS = 6378137.0;
/// <summary>
/// 获取地球两点之间的距离
/// </summary>
/// <param name="lat_a"></param>
/// <param name="lng_a"></param>
/// <param name="lat_b"></param>
/// <param name="lng_b"></param>
/// <returns></returns>
public static double Gps2m(double lat_a, double lng_a, double lat_b, double lng_b)
{
double radLat1 = (lat_a * Math.PI / 180.0);
double radLat2 = (lat_b * Math.PI / 180.0);
double a = radLat1 - radLat2;
double b = (lng_a - lng_b) * Math.PI / 180.0;
double s = 2 * Math.Asin(Math.Sqrt(Math.Pow(Math.Sin(a / 2), 2)
+ Math.Cos(radLat1) * Math.Cos(radLat2)
* Math.Pow(Math.Sin(b / 2), 2)));
s = s * EARTH_RADIUS;
s = Math.Round(s * 10000) / 10000;
return s;
}
#endregion
#region sql注入攻击
public static string[] words = { "select", "insert", "delete", "count(", "drop table", "update", "truncate", "asc(", "mid(", "char(", "xp_cmdshell", "exec", "master", "net", "and", "or", "where" };
public static string CheckParam(string Value)
{
Value = Value.Replace("'", "");
Value = Value.Replace(";", "");
Value = Value.Replace("--", "");
Value = Value.Replace("/**/", "");
return Value;
}
public static string CheckParamThrow(string Value)
{
for (int i = 0; i < words.Length; i++)
{
if (Value.IndexOf(words[i], StringComparison.OrdinalIgnoreCase) > 0)
{
string pattern = string.Format(@"[\W]{0}[\W]", words[i]);
Regex rx = new Regex(pattern, RegexOptions.IgnoreCase);
if (rx.IsMatch(Value))
throw new Exception("发现sql注入痕迹!");
}
}
return CheckParam(Value);
}
/// <summary>
/// 查找是否含有非法参数
/// </summary>
/// <param name="Value"></param>
/// <returns></returns>
public static bool CheckParamBool(string Value)
{
for (int i = 0; i < words.Length; i++)
{
if (Value.IndexOf(words[i], StringComparison.OrdinalIgnoreCase) > 0)
return true;
}
return false;
}
#endregion
#region IP地址处理
/// <summary>
/// 取得客户端真实IP。如果有代理则取第一个非内网地址
/// by flower.b
/// </summary>
public static string IPAddress
{
get
{
string result = String.Empty;
result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (result != null && result != String.Empty)
{
//可能有代理
if (result.IndexOf(".") == -1) //没有“.”肯定是非IPv4格式
result = null;
else
{
if (result.IndexOf(",") != -1)
{
//有“,”，估计多个代理。取第一个不是内网的IP。
result = result.Replace(" ", "").Replace("'", "");
string[] temparyip = result.Split(",;".ToCharArray());
for (int i = 0; i < temparyip.Length; i++)
{
if (IsIPAddress(temparyip[i])
&& temparyip[i].Substring(0, 3) != "10."
&& temparyip[i].Substring(0, 7) != "192.168"
&& temparyip[i].Substring(0, 7) != "172.16.")
{
return temparyip[i]; //找到不是内网的地址
}
}
}
else if (IsIPAddress(result)) //代理即是IP格式
return result;
else
result = null; //代理中的内容 非IP，取IP
}
}
string IpAddress = (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null && HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != String.Empty) ? HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] : HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
if (null == result || result == String.Empty)
result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
if (result == null || result == String.Empty)
result = HttpContext.Current.Request.UserHostAddress;
return result;
}
}
/// <summary>
/// 判断是否是IP地址格式 0.0.0.0
/// </summary>
/// <param name="str1">待判断的IP地址</param>
/// <returns>true or false</returns>
private static bool IsIPAddress(string str1)
{
if (str1 == null || str1 == string.Empty || str1.Length < 7 || str1.Length > 15) return false;
string regformat = @"^d{1,3}[.]d{1,3}[.]d{1,3}[.]d{1,3}$";
Regex regex = new Regex(regformat, RegexOptions.IgnoreCase);
return regex.IsMatch(str1);
}
#endregion
#region HTML处理
/// <summary>
/// 将html标签转化为特殊字符type=0或特殊字符转化为HTML type=1
/// </summary>
/// <param name="vv">源字符串</param>
/// <param name="type">转化方式</param>
/// <returns></returns>
public static string HTML_Trans(string vv,int type)
{
if (type == 0)
{
vv = vv.Replace(" ", " ");
vv = vv.Replace(" ", " ");
vv = vv.Replace(">", ">");
vv = vv.Replace("<", "<");
vv = vv.Replace("&", "&");
vv = vv.Replace("\"", """);
vv = vv.Replace("'", "&apos");
}
if (type == 1)
{
vv = vv.Replace(" "," ");
vv = vv.Replace(" "," ");
vv = vv.Replace(">",">");
vv = vv.Replace("<", "<");
vv = vv.Replace("&","&");
vv = vv.Replace(""","\"");
vv = vv.Replace("&apos", "'");
}
return vv;
}
/// <summary>
/// 去掉非法html标签
/// </summary>
/// <param name="Htmlstring"></param>
/// <returns></returns>
public static string NoHTML(object html)
{
if (html == null)
return "";
string Htmlstring = html.ToString();
//删除脚本
Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
//删除HTML
Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
Htmlstring.Replace("<", "");
Htmlstring.Replace(">", "");
Htmlstring.Replace("\r\n", "");
return Htmlstring.Trim();
}
#endregion
#region cookie操作
/// <summary>
/// Cookies赋值
/// </summary>
/// <param name="strName">主键</param>
/// <param name="strValue">键值</param>
/// <param name="strDay">有效天数</param>
/// <returns></returns>
public static bool setCookieForMIn(string strName, string strValue, int Mintius)
{
try
{
HttpCookie Cookie = new HttpCookie(strName);
//Cookie.Domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com
Cookie.Expires = DateTime.Now.AddMinutes(Mintius);
Cookie.Value = strValue;
System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);
return true;
}
catch
{
return false;
}
}
/// <summary>
/// Cookies赋值
/// </summary>
/// <param name="strName">主键</param>
/// <param name="strValue">键值</param>
/// <param name="strDay">有效天数</param>
/// <returns></returns>
public static bool setCookie(string strName, string strValue, int strDay)
{
try
{
HttpCookie Cookie = new HttpCookie(strName);
//Cookie.Domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com
Cookie.Expires = DateTime.Now.AddDays(strDay);
Cookie.Value = strValue;
System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);
return true;
}
catch
{
return false;
}
}
/// <summary>
/// 读取Cookies
/// </summary>
/// <param name="strName">主键</param>
/// <returns></returns>
public static string getCookie(string strName)
{
HttpCookie Cookie = System.Web.HttpContext.Current.Request.Cookies[strName];
if (Cookie != null)
{
return Cookie.Value.ToString();
}
else
{
return null;
}
}
/// <summary>
/// 删除Cookies
/// </summary>
/// <param name="strName">主键</param>
/// <returns></returns>
public static bool delCookie(string strName)
{
try
{
HttpCookie Cookie = new HttpCookie(strName);
//Cookie.Domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com
Cookie.Expires = DateTime.Now.AddDays(-1);
System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);
return true;
}
catch
{
return false;
}
}
#endregion
#region 获取当天的最大时间 和 最小时间
/// <summary>
/// 获取当天的最大时间 和 最小时间
/// </summary>
/// <param name="ty">0：默认为最小时间 1：最大时间</param>
/// <returns></returns>
public static string getMaxMinTim(int ty = 0)
{
if (ty == 0)
{
return DateTime.Now.Year + "-" + DateTime.Now.Month + "-" + DateTime.Now.Day + " 00:00:00";
}
else
{
return DateTime.Now.Year + "-" + DateTime.Now.Month + "-" + DateTime.Now.Day + " 23:59:59";
}
}
#endregion
#region 根据身份证 获取年龄 性别
public static PersonForIdCard GetPersonByIdCard(string identityCard)
{
string birthday = string.Empty;
string sex = string.Empty;
if (identityCard.Length == 18)//处理18位的身份证号码从号码中得到生日和性别代码
{
birthday = identityCard.Substring(6, 4) + "-" + identityCard.Substring(10, 2) + "-" + identityCard.Substring(12, 2);
sex = identityCard.Substring(14, 3);
}
if (identityCard.Length == 15)
{
birthday = "19" + identityCard.Substring(6, 2) + "-" + identityCard.Substring(8, 2) + "-" + identityCard.Substring(10, 2);
sex = identityCard.Substring(12, 3);
}
int UserAge = DateTime.Now.Year - Convert.ToDateTime(birthday).Year;
if (int.Parse(sex) % 2 == 0)
{
sex = "女";
}
else
{
sex = "男";
}
PersonForIdCard P = new PersonForIdCard
{
Age = UserAge,
Sex = sex,
Birthday = birthday
};
return P;
}
#endregion
public static int GetAgeByDate(DateTime? birthDay)
{
int age = 0;
if (birthDay.HasValue)
{
age = DateTime.Now.Year - birthDay.Value.Year;
if (DateTime.Now.Month < birthDay.Value.Month || (DateTime.Now.Month == birthDay.Value.Month && DateTime.Now.Day < birthDay.Value.Day)) age--;
if (age <= 0)
{
return 0;
}
return age;
}
return age;
}
}
public class PersonForIdCard
{
public int Age { get; set; }
public string Sex { get; set; }
public string Birthday { get; set; }
}
}
Aes可逆加密如下：
View Code缓存操作
View Code汉字拼音
View Code如果想详细了解汉字拼音及首字母的处理，请参考博客：C# 获取社会统一信用代码 和 C# 获取汉字拼音首字母/全拼
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