学步园

using System;
using System.Text;
using System.Web;
using System.Web.UI.WebControls;
using System.Text.RegularExpressions;
namespace LiTianPing //可以修改成实际项目的命名空间名称
{
/// <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("[/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);
   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 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

}
}