C#-手写页面数据校验类

using System;
using System.Globalization;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.UI.WebControls;

namespace Util
{
    /// <summary>
    /// 页面数据校验类
    /// Copyright (C) MES 2004-2012
    /// </summary>
    public class PageValidate
    {
        private static Regex RegPhone = new Regex("^[0-9]+[-]?[0-9]+[-]?[0-9]$");
        private static Regex RegNumber = new Regex("^[0-9]+$");
        private static Regex RegNumberSign = new Regex("^[+-]?[0-9]+$");
        private static Regex RegDecimal = new Regex("^[0-9]+[.]?[0-9]+$");
        private static Regex RegDecimalSign = new Regex("^[+-]?[0-9]+[.]?[0-9]+$"); //等价于^[+-]?\d+[.]?\d+$
        private static Regex RegEmail = new Regex("^[\\w-]+@[\\w-]+\\.(com|net|org|edu|mil|tv|biz|info)$");//w 英文字母或数字的字符串，和 [a-zA-Z0-9] 语法一样 
        private static Regex RegCHZN = new Regex("[\u4e00-\u9fa5]");

        public PageValidate()
        {
        }

        #region 数字字符串检查        
        public static bool IsPhone(string inputData)
        {
            Match m = RegPhone.Match(inputData);
            return m.Success;
        }
        /// <summary>
        /// 检查Request查询字符串的键值，是否是数字，最大长度限制
        /// </summary>
        /// <param name="req">Request</param>
        /// <param name="inputKey">Request的键值</param>
        /// <param name="maxLen">最大长度</param>
        /// <returns>返回Request查询字符串</returns>
        public static string FetchInputDigit(HttpRequest req, string inputKey, int maxLen)
        {
            string retVal = string.Empty;
            if(inputKey != null && inputKey != string.Empty)
            {
                retVal = req.QueryString[inputKey];
                if(null == retVal)
                    retVal = req.Form[inputKey];
                if(null != retVal)
                {
                    retVal = SqlText(retVal, maxLen);
                    if(!IsNumber(retVal))
                        retVal = string.Empty;
                }
            }
            if(retVal == null)
                retVal = string.Empty;
            return retVal;
        }        
        /// <summary>
        /// 是否数字字符串
        /// </summary>
        /// <param name="inputData">输入字符串</param>
        /// <returns></returns>
        public static bool IsNumber(string inputData)
        {
            Match m = RegNumber.Match(inputData);
            return m.Success;
        }

        /// <summary>
        /// 是否数字字符串 可带正负号
        /// </summary>
        /// <param name="inputData">输入字符串</param>
        /// <returns></returns>
        public static bool IsNumberSign(string inputData)
        {
            Match m = RegNumberSign.Match(inputData);
            return m.Success;
        }        
        /// <summary>
        /// 是否是浮点数
        /// </summary>
        /// <param name="inputData">输入字符串</param>
        /// <returns></returns>
        public static bool IsDecimal(string inputData)
        {
            Match m = RegDecimal.Match(inputData);
            return m.Success;
        }        
        /// <summary>
        /// 是否是浮点数 可带正负号
        /// </summary>
        /// <param name="inputData">输入字符串</param>
        /// <returns></returns>
        public static bool IsDecimalSign(string inputData)
        {
            Match m = RegDecimalSign.Match(inputData);
            return m.Success;
        }        

        #endregion

        #region 中文检测

        /// <summary>
        /// 检测是否有中文字符
        /// </summary>
        /// <param name="inputData"></param>
        /// <returns></returns>
        public static bool IsHasCHZN(string inputData)
        {
            Match m = RegCHZN.Match(inputData);
            return m.Success;
        }    

        #endregion

        #region 邮件地址
        /// <summary>
        /// 是否是浮点数 可带正负号
        /// </summary>
        /// <param name="inputData">输入字符串</param>
        /// <returns></returns>
        public static bool IsEmail(string inputData)
        {
            Match m = RegEmail.Match(inputData);
            return m.Success;
        }        

        #endregion

        #region 日期格式判断
        /// <summary>
        /// 日期格式字符串判断
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsDateTime(string str)
        {
            try
            {
                if (!string.IsNullOrEmpty(str))
                {
                    DateTime.Parse(str);
                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch
            {
                return false;
            }
        } 
        #endregion

        #region 其他

        /// <summary>
        /// 检查字符串最大长度，返回指定长度的串
        /// </summary>
        /// <param name="sqlInput">输入字符串</param>
        /// <param name="maxLength">最大长度</param>
        /// <returns></returns>            
        public static string SqlText(string sqlInput, int maxLength)
        {            
            if(sqlInput != null && sqlInput != string.Empty)
            {
                sqlInput = sqlInput.Trim();                            
                if(sqlInput.Length > maxLength)//按最大长度截取字符串
                    sqlInput = sqlInput.Substring(0, maxLength);
            }
            return sqlInput;
        }        
        /// <summary>
        /// 字符串编码
        /// </summary>
        /// <param name="inputData"></param>
        /// <returns></returns>
        public static string HtmlEncode(string inputData)
        {
            return HttpUtility.HtmlEncode(inputData);
        }
        /// <summary>
        /// 设置Label显示Encode的字符串
        /// </summary>
        /// <param name="lbl"></param>
        /// <param name="txtInput"></param>
        public static void SetLabel(Label lbl, string txtInput)
        {
            lbl.Text = HtmlEncode(txtInput);
        }
        public static void SetLabel(Label lbl, object inputObj)
        {
            SetLabel(lbl, inputObj.ToString());
        }        
        //字符串清理
        public static string InputText(string inputString, int maxLength) 
        {            
            StringBuilder retVal = new StringBuilder();

            // 检查是否为空
            if ((inputString != null) && (inputString != String.Empty)) 
            {
                inputString = inputString.Trim();
                
                //检查长度
                if (inputString.Length > maxLength)
                    inputString = inputString.Substring(0, maxLength);
                
                //替换危险字符
                for (int i = 0; i < inputString.Length; i++) 
                {
                    switch (inputString[i]) 
                    {
                        case '"':
                            retVal.Append("&quot;");
                            break;
                        case '<':
                            retVal.Append("&lt;");
                            break;
                        case '>':
                            retVal.Append("&gt;");
                            break;
                        case '\'':
                            retVal.Append("");//Ankang Add
                            break;
                        default:
                            retVal.Append(inputString[i]);
                            break;
                    }
                }                
                retVal.Replace("'", " ");// 替换单引号
            }
            return retVal.ToString();
            
        }
        /// <summary>目前未使用
        /// 过滤SQL语句,防止注入
        /// </summary>
        /// <param name="strSql"></param>
        /// <returns>0 - 没有注入, 1 - 有注入 </returns>
        public static int filterSql(string sSql)
        {
            int srcLen, decLen = 0;
            sSql = sSql.ToLower().Trim();
            srcLen = sSql.Length;
            sSql = sSql.Replace("exec", "");
            sSql = sSql.Replace("delete", "");
            sSql = sSql.Replace("master", "");
            sSql = sSql.Replace("truncate", "");
            sSql = sSql.Replace("declare", "");
            sSql = sSql.Replace("create", "");
            sSql = sSql.Replace("xp_", "no");
            decLen = sSql.Length;
            if (srcLen == decLen)
                return 0;
            else return 1;
        }

        //字符串清理
        public static string InputText(string inputString)
        {
            StringBuilder retVal = new StringBuilder();

            // 检查是否为空
            if ((inputString != null) && (inputString != String.Empty))
            {
                inputString = inputString.Trim();

                //检查长度
                //if (inputString.Length > maxLength)
                //    inputString = inputString.Substring(0, maxLength);

                //替换危险字符
                for (int i = 0; i < inputString.Length; i++)
                {
                    switch (inputString[i])
                    {
                        case '"':
                            retVal.Append("&quot;");
                            break;
                        case '<':
                            retVal.Append("&lt;");
                            break;
                        case '>':
                            retVal.Append("&gt;");
                            break;
                        default:
                            retVal.Append(inputString[i]);
                            break;
                    }
                }
                retVal.Replace("'", " ");// 替换单引号
            }
            return retVal.ToString();

        }
        /// <summary>
        /// 转换成 HTML code
        /// </summary>
        /// <param name="str">string</param>
        /// <returns>string</returns>
        public static string Encode(string str)
        {            
            str = str.Replace("&","&amp;");
            str = str.Replace("'","''");
            str = str.Replace("\"","&quot;");
            str = str.Replace(" ","&nbsp;");
            str = str.Replace("<","&lt;");
            str = str.Replace(">","&gt;");
            str = str.Replace("\n","<br>");
            return str;
        }
        /// <summary>
        ///解析html成 普通文本
        /// </summary>
        /// <param name="str">string</param>
        /// <returns>string</returns>
        public static string Decode(string str)
        {            
            str = str.Replace("<br>","\n");
            str = str.Replace("&gt;",">");
            str = str.Replace("&lt;","<");
            str = str.Replace("&nbsp;"," ");
            str = str.Replace("&quot;","\"");
            return str;
        }

        public static string SqlTextClear(string sqlText)
        {
            if (sqlText == null)
            {
                return null;
            }
            if (sqlText == "")
            {
                return "";
            }
            sqlText = sqlText.Replace(",", "");//去除,
            sqlText = sqlText.Replace("<", "");//去除<
            sqlText = sqlText.Replace(">", "");//去除>
            sqlText = sqlText.Replace("--", "");//去除--
            sqlText = sqlText.Replace("'", "");//去除'
            sqlText = sqlText.Replace("\"", "");//去除"
            sqlText = sqlText.Replace("=", "");//去除=
            sqlText = sqlText.Replace("%", "");//去除%
            sqlText = sqlText.Replace(" ", "");//去除空格
            return sqlText;
        }

        #region ReadPost 解析POST内的Data数据
        /// <summary>
        /// 接收Post请求的Data数据处理
        /// 2021-02-03 added by hyx 读取POST信息方式
        /// </summary>
        public static string ReadPost(System.IO.Stream inputStreamTemp)
        {
            var inputStream = inputStreamTemp;
            string str = "";
            using (var sr = new System.IO.StreamReader(inputStream))
                str = sr.ReadToEnd();
            return str;
        }
        #endregion

        #endregion

        #region 是否由特定字符组成
        public static bool isContainSameChar(string strInput)
        {
            string charInput = string.Empty;
            if (!string.IsNullOrEmpty(strInput))
            {
                charInput = strInput.Substring(0, 1);
            }
            return isContainSameChar(strInput, charInput, strInput.Length);
        }

        public static bool isContainSameChar(string strInput, string charInput, int lenInput)
        {
            if (string.IsNullOrEmpty(charInput))
            {
                return false;
            }
            else
            {
                Regex RegNumber = new Regex(string.Format("^([{0}])+$", charInput));
                //Regex RegNumber = new Regex(string.Format("^([{0}]{{1}})+$", charInput,lenInput));
                Match m = RegNumber.Match(strInput);
                return m.Success;
            }
        }
        #endregion

        #region 检查输入的参数是不是某些定义好的特殊字符：这个方法目前用于密码输入的安全检查
        /// <summary>
        /// 检查输入的参数是不是某些定义好的特殊字符：这个方法目前用于密码输入的安全检查
        /// </summary>
        public static bool isContainSpecChar(string strInput)
        {
            string[] list = new string[] { "123456", "654321" };
            bool result = new bool();
            for (int i = 0; i < list.Length; i++)
            {
                if (strInput == list[i])
                {
                    result = true;
                    break;
                }
            }
            return result;
        }
        #endregion

        public static string SafeLongFilter(string text, long defaultValue, char split = ',')
        {
            if (text.Trim().Length < 1)
                return defaultValue.ToString(CultureInfo.InvariantCulture);
            string[] tmpSplit = text.Split(new[] { split }, StringSplitOptions.RemoveEmptyEntries);
            if (tmpSplit.Length < 1)
                return defaultValue.ToString(CultureInfo.InvariantCulture);

            long tmp;
            for (int i = 0; i < tmpSplit.Length; i++)
            {
                if (long.TryParse(tmpSplit[i], out tmp))
                    tmpSplit[i] = tmp.ToString(CultureInfo.InvariantCulture);
                else
                    tmpSplit[i] = defaultValue.ToString(CultureInfo.InvariantCulture);
            }
            return string.Join(split.ToString(CultureInfo.InvariantCulture), tmpSplit);
        }

        public static String String2Json(String s)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < s.Length; i++)
            {
                char c = s.ToCharArray()[i];
                switch (c)
                {
                    case '\"':
                        sb.Append("\\\""); break;
                    case '\\':
                        sb.Append("\\\\"); break;
                    case '/':
                        sb.Append("\\/"); break;
                    case '\b':
                        sb.Append("\\b"); break;
                    case '\f':
                        sb.Append("\\f"); break;
                    case '\n':
                        sb.Append("\\n"); break;
                    case '\r':
                        sb.Append("\\r"); break;
                    case '\t':
                        sb.Append("\\t"); break;
                    default:
                        if ((c >= 0 && c <= 31) || c == 127)//在ASCⅡ码中，第0～31号及第127号(共33个)是控制字符或通讯专用字符
                        {

                        }
                        else
                        {
                            sb.Append(c);
                        }
                        break;
                }
            }
            return sb.ToString();
        }
    }
}

　　后面会整理到Fluentvalidation中。