【正则表达式|c#正则表达式——匹配不同类型的一个字符】匹配不同类型的一个字符
string pattern = @"\d";
//0到9的任一一个数字
string input = "abc123efg! ";
Regex regex = new Regex(pattern);
var matchCollection = regex.Matches(input);
foreach (Match item in matchCollection)
{
Console.WriteLine(item.Valuehttps://www.it610.com/article/==" "?"空白": item.Value);
}Console.WriteLine();
pattern = @"\D";
//非数字字符
regex = new Regex(pattern);
matchCollection = regex.Matches(input);
foreach (Match item in matchCollection)
{
Console.WriteLine(item.Value =https://www.it610.com/article/=" " ? "空白" : item.Value);
}Console.WriteLine();
pattern = @"\w";
//任一单词字符
regex = new Regex(pattern);
matchCollection = regex.Matches(input);
foreach (Match item in matchCollection)
{
Console.WriteLine(item.Value =https://www.it610.com/article/=" " ? "空白" : item.Value);
}Console.WriteLine();
pattern = @"\W";
//非单词字符
regex = new Regex(pattern);
matchCollection = regex.Matches(input);
foreach (Match item in matchCollection)
{
Console.WriteLine(item.Value =https://www.it610.com/article/=" " ? "空白" : item.Value);
}Console.WriteLine();
pattern = @"\s";
//任一空白字符
regex = new Regex(pattern);
matchCollection = regex.Matches(input);
foreach (Match item in matchCollection)
{
Console.WriteLine(item.Value=https://www.it610.com/article/=" " ? "空白" : item.Value) ;
}Console.WriteLine();
pattern = @"\S";
//任一非空白字符
regex = new Regex(pattern);
matchCollection = regex.Matches(input);
foreach (Match item in matchCollection)
{
Console.WriteLine(item.Value =https://www.it610.com/article/=" " ? "空白" : item.Value);
}Console.WriteLine();
pattern = @".";
//任一字符
regex = new Regex(pattern);
matchCollection = regex.Matches(input);
foreach (Match item in matchCollection)
{
Console.WriteLine(item.Value =https://www.it610.com/article/=" " ? "空白" : item.Value);
}Console.WriteLine();
pattern = @"[abc123]";
//括号内的任一个字符都可以
regex = new Regex(pattern);
matchCollection = regex.Matches(input);
foreach (Match item in matchCollection)
{
Console.WriteLine(item.Value =https://www.it610.com/article/=" " ? "空白" : item.Value);
}Console.WriteLine();
pattern = @"[^abc]";
//非括号中的任一字符
regex = new Regex(pattern);
matchCollection = regex.Matches(input);
foreach (Match item in matchCollection)
{
Console.WriteLine(item.Value =https://www.it610.com/article/=" " ? "空白" : item.Value);
}Console.WriteLine();
pattern = @"[a-c]";
regex = new Regex(pattern);
matchCollection = regex.Matches(input);
foreach (Match item in matchCollection)
{
Console.WriteLine(item.Value =https://www.it610.com/article/=" " ? "空白" : item.Value);
}
Console.ReadKey();
输出：
1
2
3a
b
c
e
f
g
!
空白a
b
c
1
2
3
e
f
g!
空白空白a
b
c
1
2
3
e
f
g
!a
b
c
1
2
3
e
f
g
!
空白a
b
c
1
2
31
2
3
e
f
g
!
空白
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