COMP/StringUtil.cs

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using System;
using System.Drawing;
using System.Data;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text.RegularExpressions;
using System.IO;
using System.Drawing.Imaging;
using System.Text;
using System.Web.Security;

namespace COCOWO.COMP
{
    /// <summary>
    /// 对一些字符串进行操作的类
    /// 创建时间:2006-8-3
    /// 创建者:马先光
    /// </summary>
    public class StringUtil
    {
        private static string passWord;	//加密字符串

        /// <summary>
        /// 判断输入是否数字
        /// </summary>
        /// <param name="num">要判断的字符串</param>
        /// <returns></returns>
        static public bool VldInt(string num)
        {
            #region
            try
            {
                Convert.ToInt32(num);
                return true;
            }
            catch { return false; }
            #endregion
        }
          

        /// <summary>
        /// 修改特殊字符
        /// </summary>
        /// <param name="str">要替换的字符串</param>
        /// <returns></returns>
        static public string CheckStr(string str)
        {
            #region
            return str.Replace("<br />\r\n", "\r\n").Replace("&", "&amp;").Replace("'", "&apos;").Replace(@"""", "&quot;").Replace(" ", "&nbsp;").Replace("<", "&lt;").Replace(">", "&gt;").Replace(" ", "&nbsp;").Replace(" where ", " wh&#101;re ").
                Replace(" select ", " sel&#101;ct ").Replace(" insert ", " ins&#101;rt ").Replace(" create ", " cr&#101;ate ").Replace(" drop ", " dro&#112 ").
                Replace(" alter ", " alt&#101;r ").Replace(" delete ", " del&#101;te ").Replace(" update ", " up&#100;ate ").Replace(" or ", " o&#114; ").Replace("\"", @"&#34;").
                Replace("\r\n", "<br />\r\n");
            #endregion
        }

        /// <summary>
        /// 恢复特殊字符
        /// </summary>
        /// <param name="str">要替换的字符串</param>
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