Common/StrHelper.cs

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using System;
using System.Drawing;
using System.Text.RegularExpressions;
using System.IO;
using System.Drawing.Imaging;
using System.Net;
using System.Collections;
using System.Text;
using System.Security.Cryptography;


namespace Common
{
    public class StrHelper
    {
      //  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
            int ResultNum;
            return int.TryParse(num, out ResultNum);
            #endregion
        }

        /// <summary>
        /// 返回文本编辑器替换后的字符串
        /// </summary>
        /// <param name="str">要替换的字符串</param>
        /// <returns></returns>
        static public string GetHtmlEditReplace(string str)
        {
            #region
            return str.Replace("'", "’").Replace("&nbsp;", " ").Replace(",", "，").Replace("%", "％").
                Replace("script", "").Replace(".js", "");
            #endregion
        }

        /// <summary>
        /// 截取字符串函数
        /// </summary>
        /// <param name="str">所要截取的字符串</param>
        /// <param name="num">截取字符串的长度</param>
        /// <returns></returns>
        static public string GetSubString(string str, int num)
        {
            #region
            return (str.Length > num) ? str.Substring(0, num) + "..." : str;
            #endregion
        }

        /// <summary>
        /// 截取字符串优化版
        /// </summary>
        /// <param name="stringToSub">所要截取的字符串</param>