[ASP.NET] Replace 字串的幾種方法

2011-11-02

10375
0
ASP.NET

這幾天有一個Task是一個很常見的Task ，

就是搜尋關鍵字，但是要把搜尋出來的關鍵字做highlight ，

所以順便寫了一些比較常見的Replace方法，來記錄一下

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text.RegularExpressions;

public partial class testReplace : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string str = "Test,TEST,teSt,tesT,test";
        string replaceStr = "test";
        Response.Write("(1)正常:" + str);
        Response.Write("(2)一般Replace:" + str.Replace(replaceStr, "" + replaceStr + ""));
        Response.Write("(3)忽略大小寫Replace1:" + Regex.Replace(str, replaceStr, "" + replaceStr + "", RegexOptions.IgnoreCase));
        Response.Write("(4)忽略大小寫Replace2:" + HighlightString(str, replaceStr));
    }
    protected string HighlightString(string Contents, string ReplaceWord)
    {
        System.Text.RegularExpressions.MatchCollection matchs = Regex.Matches(Contents, ReplaceWord, RegexOptions.IgnoreCase);
        for (int i = 0; i < matchs.Count; i++)
        {
            Contents = Regex.Replace(Contents, matchs[i].Value, "" + matchs[i].Value + "");
        }

        return Contents;
    }
}

顯示的結果如下

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