用于正则表达式的 Regex.Matches静态方法的几种用法
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//①正则表达式 = > 匹配字符串
string Text = @"This is a book , this is my book , Is not IIS";
//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();
//①正则表达式 = > 匹配字符串
string Text = @"This is a book , this is my book , Is not IIS";
//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:
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①从右向左匹配字符串:
匹配的位置:43 匹配的内容:IS
匹配的位置:35 匹配的内容:Is
匹配的位置:22 匹配的内容:is
匹配的位置:19 匹配的内容:is
匹配的位置: 5 匹配的内容:is
匹配的位置: 2 匹配的内容:is
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