using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^([1-9]\d*|0)\.(\d*[1-9]+)$";
string input = @"小数点左侧条件1：[1-9]开头的数字后面可以是任何数量的数字
小数点左侧条件2：只有一个0
小数点右侧条件1：任意数量的数字，并且结尾必须是[1-9]
1
1.
1.0
1.10
01.1
01.01
01.10
2.1
2.20
2.01
2.020
3.105
3.01205
2.005
0.02";
RegexOptions options = RegexOptions.Multiline;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx