JS关键字变色实现思路及代码_javascript技巧

public static string ReplaceRed(string strtitle, string redkey)
{
if (redkey == "" || redkey == null)
{
return strtitle;
}
else
strtitle = strtitle.Replace(redkey, " " + redkey + " ");
return strtitle;
}

protected string HighlightText(string inputText,string searchWord)
{
System.Text.RegularExpressions.Regex expression = new System.Text.RegularExpressions.Regex(searchWord.Replace(" ", "|"), System.Text.RegularExpressions.RegexOptions.IgnoreCase);
return expression.Replace(inputText,new System.Text.RegularExpressions.MatchEvaluator(ReplaceKeywords));
}
public string ReplaceKeywords(System.Text.RegularExpressions.Match m)
{
return "" + m.Value + "";//关键字背景加色
//return "" + m.Value + "";//关键字变色
}