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}");
}
///
/// 判断是否是汉字
///
///
///
/// 截取字符长度
///
/// 被截取的字符串
/// 所截取的长度
/// 子字符串
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;
}
}
///
/// //截取字符串中文 字母
///
/// 源字符串
/// 截取长度！
///
/// 生成一个1到10000000之间的正整数
///
///
/// 产生验证码
///
/// 获取的验证码长度
/// 验证码
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;
}
///
/// 获取一个随机字符串
///
///
///
/// 获取特定位数的随机数
///
///
///
/// //获取18位订单编号
///
///
/// 获取支付编号
///
///
/// //获取17位活动编号
///
///
/// //获取购物车产品流水号
///
///
/// //获取会员唯一编号
///
///
/// 长度不够补0
///
///
///
///
/// 获取地球两点之间的距离
///
///
///
///
///
///
/// 查找是否含有非法参数
///
///
///
/// 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
///
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;
}
}
///
/// 判断是否是IP地址格式 0.0.0.0
///
/// 待判断的IP地址
/// true or false
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
///
/// 将html标签转化为特殊字符type=0或特殊字符转化为HTML type=1
///
/// 源字符串
/// 转化方式
///
/// 去掉非法html标签
///
///
/// ]*?>.*?", "", 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, @"