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C#:如何有效地从预定义的字符串格式中提取值?

.net c#

1

funwithcoding · 技术社区 · 15 年前

我收集了一些类似的弦

例如: 字符串1:客户的名字是john,姓glueck,公司名是abc def technolgies llc,余额为60美元,消费率为+3.45%

字符串2:客户的名字是史蒂夫,他的姓是约翰斯顿,他的公司名是xyz公司,他有800美元的余额。他的消费率是-212.86%

现在我必须从字符串1中提取john,glueck,abc def technolgies llc,60,+3.45和steve,johnston,xyz corporation,800,-212.86这样的值。

是否有与string.format相反的方法,该方法接受引用字符串&实际字符串并返回提取的值?

2 回复 | 直到 15 年前

1

13

Daniel Brückner 15 年前

一个正则表达式就可以了。

namespace ConsoleApplication
{
    using System;
    using System.Text.RegularExpressions;

    internal static class Program
    {
        private static void Main()
        {
            var expression = new Regex(
                @"Customer's first Name is (?<FirstName>[^,]+), " +
                @"his last name is (?<LastName>[^,]+), " +
                @"his company name is (?<CompanyName>[^,]+), " +
                @"he has a balance of (?<Balance>[0-9]+) dollars\. " +
                @"His spending rate is (?<SpendingRate>[^%]+)%");

            var line = @"Customer's first Name is john, his last name is glueck, his company name is abc def technolgies llc, he has a balance of 60 dollars. His spending rate is +3.45%";

            var match = expression.Match(line);

            Console.WriteLine("First name......{0}", match.Groups["FirstName"]);
            Console.WriteLine("Last name.......{0}", match.Groups["LastName"]);
            Console.WriteLine("Balance.........{0}", match.Groups["Balance"]);
            Console.WriteLine("Spending rate...{0}", match.Groups["SpendingRate"]);

            Console.ReadLine();
        }
    }
}

First name......john
Last name.......glueck
Balance.........60
Spending rate...+3.45

之后,您可以执行一些简单的字符串解析,从字符串中获取数值。此外,如果输入的格式有一些变化,您可能需要编写一个更健壮的正则表达式。

2

James Curran 15 年前

(问题:您实际输入的字符串是完整的文字:“客户的名字是xxxx,他的姓是xxxx,他的公司名是xxxx”等等。正确吗?)

更新:

  // NOTE: pattern assumes a comma after spending rate
  Regex regex = new Regex("Customer's first Name is (\w+), his last name is (\w+),his company name is ([\w\s]+), he has a balance of (\d+) dollars.His spending rate is ([^,]+)");

  string[] values = regex.Split(string1);