用于正则表达式的 Regex.Matches静态方法的几种用法:
//定义一个模式字符串,不仅仅是纯文本,还可以是正则表达式
string Pattern = "is";
MatchCollection Matches = Regex.Matches(
Text,
Pattern,
RegexOptions.IgnoreCase | //忽略大小写
RegexOptions.ExplicitCapture | //提高检索效率
RegexOptions.RightToLeft //从左向右匹配字符串
);
Console.WriteLine("从右向左匹配字符串:");
foreach (Match NextMatch in Matches)
{
Console.Write("匹配的位置:{0,2} ", NextMatch.Index);
Console.Write("匹配的内容:{0,2} ", NextMatch.Value);
Console.Write("/n");
}
Console.WriteLine();
//②匹配以大写I开头
//“/b”是转义序列,代表开头和结尾(一个字的边界,忽略空白或标点)
Pattern = @"/bI";
Matches = Regex.Matches(
Text,
Pattern,
RegexOptions.ExplicitCapture //提高检索效率
);
Console.WriteLine("从左向右匹配字符串:");
foreach (Match NextMatch in Matches)
{
Console.Write("匹配的位置:{0} ", NextMatch.Index);
Console.Write("匹配的内容:{0} ", NextMatch.Value);
Console.Write("/n");
}
Console.WriteLine();
//③匹配以大写I开头,大写S结尾的字符串
//“/b”是转义序列,代表开头和结尾(一个字的边界,忽略空白或标点)
///S*匹配任何不是空白的字符
Pattern = @"/bI/S*S/b";
Matches = Regex.Matches(
Text,
Pattern,
RegexOptions.ExplicitCapture //提高检索效率
);
Console.WriteLine("从左向右匹配字符串:");
foreach (Match NextMatch in Matches)
{
Console.Write("匹配的位置:{0} ", NextMatch.Index);
Console.Write("匹配的内容:{0} ", NextMatch.Value);
Console.Write("/n");
}
Console.WriteLine();
//④匹配his 或者iis,其中忽略大小写
Pattern = @"[h|i]is";
Matches = Regex.Matches(
Text,
Pattern,
RegexOptions.IgnoreCase | //忽略大小写
RegexOptions.ExplicitCapture //提高检索效率
);
Console.WriteLine("从左向右匹配字符串:");
foreach (Match NextMatch in Matches)
{
Console.Write("匹配的位置:{0} ", NextMatch.Index);
Console.Write("匹配的内容:{0} ", NextMatch.Value);
Console.Write("/n");
}
Console.WriteLine();
//⑤对Url的分组匹配
Text = "http://192.168.0.1:2008";
Pattern = @"/b(/S+)://(/S+)(?::(/S+))/b";
Matches = Regex.Matches(Text, Pattern);
Console.WriteLine("从左向右匹配字符串:");
foreach (Match NextMatch in Matches)
{
Console.Write("匹配的位置:{0} ", NextMatch.Index);
Console.Write("匹配的内容:{0} ", NextMatch.Value);
Console.Write("/n");
for (int i = 0; i < NextMatch.Groups.Count; i++)
{
Console.Write("匹配的组 {0}:{1,4} ", i + 1, NextMatch.Groups[i].Value);
Console.Write("/n");
}
}
Console.Read();
输出结果为:
②从左向右匹配字符串:
匹配的位置:35 匹配的内容:I
匹配的位置:42 匹配的内容:I
③从左向右匹配字符串:
匹配的位置:42 匹配的内容:IIS
④从左向右匹配字符串:
匹配的位置:1 匹配的内容:his
匹配的位置:18 匹配的内容:his
匹配的位置:42 匹配的内容:IIS
⑤从左向右匹配字符串:
匹配的位置:0 匹配的内容:http://192.168.0.1:2008
匹配的组 1:http://192.168.0.1:2008
匹配的组 2:http
匹配的组 3:192.168.0.1
匹配的组 4:2008