util/StringFormat.cs

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Text;
using System.Text.RegularExpressions;

/// <summary>
/// StringFormat 的摘要说明
/// </summary>
public class StringFormat
{
    #region 部分变量声明
    private static StringBuilder outstr;
    private static Regex objregex;
    #endregion

    #region 输出字符串
    /// <summary>
    /// 返回用于编辑的字符串并进行Html解码
    /// </summary>
    /// <param name="instr">要输出的字符串</param>
    /// <returns></returns>
    public static string OutString(string instr)
    {
        instr = HttpContext.Current.Server.HtmlDecode(instr);
        instr = instr.Replace("<br />" + Environment.NewLine, Environment.NewLine);
        return instr;
    }

    /// <summary>
    /// 返回用于显示的字符串并删除超过限定字数的字符
    /// </summary>
    /// <param name="instr">要输出的文本</param>
    /// <param name="WordCount">要输出的字数</param>
    /// <returns></returns>
    public static string OutString(string instr, int WordCount)
    {
        byte[] mybyte = System.Text.Encoding.Default.GetBytes(instr);
        if (mybyte.Length > WordCount)
        {
            outstr = new StringBuilder();
            for (int i = 0; i < instr.Length; i++)
            {
                byte[] tempByte = System.Text.Encoding.Default.GetBytes(outstr.ToString());
                if (tempByte.Length < WordCount * 2)
                {
                    outstr.Append(instr.Substring(i, 1));
                }
                else
                {
                    break;
                }
            }