正则怎样让文本中的所有网址自动变成连接?
0
最佳答案
0
by baidu:
public static string ShowUrls(string text)
{
Regex linkRegex = new Regex(" href\\s*=\\s*(?:(?:\\\"(?<url>[^\\\"]*)\\\")|(?<url>[^\\s]* ))",
RegexOptions.IgnoreCase | RegexOptions.Compiled);
MatchCollection linkMatchs = linkRegex.Matches(text);
string pattern = @"(http|ftp|https):\/\/[\w]+(.[\w]+)([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])";
MatchCollection matchs;
string clearText = Regex.Replace(text, "<[^>]*>",string.Empty, RegexOptions.Compiled);//清除html标记
matchs = Regex.Matches(clearText, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled);
bool flag = true;
foreach (Match m in matchs)
{
string link = "<a href=\"" + m.ToString() + "\" target=\"_new\">" + m.ToString() + "</a>";
if (linkMatchs.Count > 0)
{
foreach (Match linkMatch in linkMatchs)
{
if (linkMatch.Value.IndexOf(m.Value) > -1)
{
flag = false;
break;
}
}
}
if(flag)
{
text = text.Replace(m.ToString(), link);
}
}
return text;
}
其他回答(1)
0
可以用下面正则来匹配
using System;
using System.Text.RegularExpressions;
public class GeneralValidation
{
public static bool IsEmail(string Email)
{
string strRegex = @"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}" +
@"\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\" +
@".)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$";
Regex re = new Regex(strRegex);
if (re.IsMatch(Email))
return (true);
else
return (false);
}
public static bool IsUrl(string Url)
{
string strRegex = "^(https?://)"
+ "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?" //user@
+ @"(([0-9]{1,3}\.){3}[0-9]{1,3}" // IP- 199.194.52.184
+ "|" // allows either IP or domain
+ @"([0-9a-z_!~*'()-]+\.)*" // tertiary domain(s)- www.
+ @"([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\." // second level domain
+ "[a-z]{2,6})" // first level domain- .com or .museum
+ "(:[0-9]{1,4})?" // port number- :80
+ "((/?)|" // a slash isn't required if there is no file name
+ "(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)$";
Regex re = new Regex(strRegex);
if (re.IsMatch(Url))
return (true);
else
return (false);
}
}
