本文介绍了一种页面数据校验类的实现方法，包括数字、浮点数、电子邮件地址的有效性验证及中文字符检测等功能。通过正则表达式进行字符串匹配，确保输入数据符合预期格式。
/**//// <summary> 
/// 页面数据校验类 /// 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("[一-龥]"); public PageValidate() 
...{ 
} 数字字符串检查#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); 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 中文检测#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 邮件地址#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 其他#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()); } #endregion }
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