using System;using System.Text;using System.Web;using System.Web.UI.WebControls;using System.Text.RegularExpressions;namespace sp //可以修改成實際項目的命名空間名稱{	/// <summary>	/// 頁面數據校驗類	/// 李天平	/// 2004.8	/// </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]+$");		private static Regex RegDecimalSign = new Regex("^[+-]?[0-9]+[.]?[0-9]+$"); //等價于^[+-]?\d+[.]?\d+$		private static Regex RegEmail = new Regex("^[\\w-]+@[\\w-]+\\.(com|net|org|edu|mil|tv|biz|info)$");//w 英文字母或數字的字符串，和 [a-zA-Z0-9] 語法一樣 		private static Regex RegCHZN = new Regex("[\u4e00-\u9fa5]");		public PageValidate()		{		}		#region 數字字符串檢查						/// <summary>		/// 檢查Request查詢字符串的鍵值，是否是數字，最大長度限制		/// </summary>		/// <param name="req">Request</param>		/// <param name="inputKey">Request的鍵值</param>		/// <param name="maxLen">最大長度</param>		/// <returns>返回Request查詢字符串</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>		/// 是否數字字符串		/// </summary>		/// <param name="inputData">輸入字符串</param>		/// <returns></returns>		public static bool IsNumber(string inputData)		{			Match m = RegNumber.Match(inputData);			return m.Success;		}				/// <summary>		/// 是否數字字符串 可帶正負號		/// </summary>		/// <param name="inputData">輸入字符串</param>		/// <returns></returns>		public static bool IsNumberSign(string inputData)		{			Match m = RegNumberSign.Match(inputData);			return m.Success;		}				/// <summary>		/// 是否是浮點數		/// </summary>		/// <param name="inputData">輸入字符串</param>		/// <returns></returns>		public static bool IsDecimal(string inputData)		{			Match m = RegDecimal.Match(inputData);			return m.Success;		}				/// <summary>		/// 是否是浮點數 可帶正負號		/// </summary>		/// <param name="inputData">輸入字符串</param>		/// <returns></returns>		public static bool IsDecimalSign(string inputData)		{			Match m = RegDecimalSign.Match(inputData);			return m.Success;		}				#endregion		#region 中文檢測		/// <summary>		/// 檢測是否有中文字符		/// </summary>		/// <param name="inputData"></param>		/// <returns></returns>		public static bool IsHasCHZN(string inputData)		{			Match m = RegCHZN.Match(inputData);			return m.Success;		}			#endregion		#region 郵件地址		/// <summary>		/// 是否是浮點數 可帶正負號		/// </summary>		/// <param name="inputData">輸入字符串</param>		/// <returns></returns>		public static bool IsEmail(string inputData)		{			Match m = RegEmail.Match(inputData);			return m.Success;		}				#endregion		#region 其他		/// <summary>		/// 檢查字符串最大長度，返回指定長度的串		/// </summary>		/// <param name="sqlInput">輸入字符串</param>		/// <param name="maxLength">最大長度</param>		/// <returns></returns>					public static string SqlText(string sqlInput, int maxLength)		{						if(sqlInput != null && sqlInput != string.Empty)			{				sqlInput = sqlInput.Trim();											if(sqlInput.Length > maxLength)//按最大長度截取字符串					sqlInput = sqlInput.Substring(0, maxLength);			}			return sqlInput;		}				/// <summary>		/// 字符串編碼		/// </summary>		/// <param name="inputData"></param>		/// <returns></returns>		public static string HtmlEncode(string inputData)		{			return HttpUtility.HtmlEncode(inputData);		}		/// <summary>		/// 設置Label顯示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());		}				#endregion	}}