动态组合SQL语句方式实现批量更新的实例(4)

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
//引入如下命名空间
using System.Text.RegularExpressions;
using System.Text;

/// <summary>
///StrHelper 的摘要说明
/// </summary>
public class StrHelper
{
    public StrHelper(){}
    /// <summary>
    /// 截取字符串函数
    /// </summary>
    /// <param>所要截取的字符串</param>
    /// <param>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>所要截取的字符串</param>
    /// <param>截取字符串的长度</param>
    /// <returns></returns>
    public static string GetFirstString(string stringToSub, int length)
    {
        #region
        Regex regex = new Regex("[\u4e00-\u9fa5]+", RegexOptions.Compiled);
        char[] stringChar = stringToSub.ToCharArray();
        StringBuilder sb = new StringBuilder();
        int nLength = 0;
        bool isCut = false;
        for (int i = 0; i < stringChar.Length; i++)
        {
            if (regex.IsMatch((stringChar[i]).ToString()))//regex.IsMatch指示正则表达式在输入字符串中是否找到匹配项
            {
                sb.Append(stringChar[i]);//将信息追加到当前 StringBuilder 的结尾
                nLength += 2;
            }
            else
            {
                sb.Append(stringChar[i]);
                nLength = nLength + 1;
            }
            if (nLength > length)//替换字符串
            {
                isCut = true;
                break;
            }
        }
        if (isCut)
            return sb.ToString() + "...";
        else
            return sb.ToString();
        #endregion
    }
    /// 弹出JavaScript小窗口
    /// </summary>
    /// <param>窗口信息</param>
    public static void Alert(string message)
    {
        #region
        string js = @"<Script language='JavaScript'>
                    alert('" + message + "');</Script>";
        HttpContext.Current.Response.Write(js);