App_Code/Web/PageValidate.cs

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

namespace WebHL 
{
	/// <summary>
	/// 页面数据校验类
	/// </summary>
	public class PageValidate
	{
		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		
		
		/// <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);