如何检查组合词（天气字符串，整数或无效输入？ [英] How to check combination word (weather string, integer or invalid input ?

问题描述

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Text.RegularExpressions;

namespace Test222
{
    class Program
    {
        static void Main(string[] args)
        {
            int n;
            
            Console.WriteLine("Type here...and Check");
            string strInput = Console.ReadLine();
            int result = 0;
            if (int.TryParse(strInput, out result))
            {
                Console.WriteLine("{0} is number", result);
            }


            else
            {
                Console.WriteLine("{0} is not ", strInput);

            }
            
            Console.ReadLine();
        }

    }
}

我尝试过：



i尝试天气字符串或整数，但我需要的是给定输入是整数和字符串的组合

What I have tried:

i tried to weather string or integer but i need when given input is combination of integer and string

推荐答案

看起来你需要学习正则表达式（RegEx）。

Looks like you need to learn Regular Expressions (RegEx).

^[A-Z0*9]+

将匹配字母和数字的混合。



正则表达式类（System.Text.RegularExpressions） [ ^ ]

正则表达式语言 - 快速参考 [< a href =https://msdn.microsoft.com/en-us/library/az24scfc%28v=vs.110%29.aspxtarget = _blanktitle =新窗口> ^ ]

以下是RegEx文档的链接：

perlre - perldoc.perl.org [ ^ ]

以下是帮助构建RegEx并调试它们的工具的链接：

.NET Regex Tester - Regex Storm [ ^ ]

Expresso正则表达式工具 [ ^ ]

这个显示RegEx是一个很好的图表，它真的有助于理解正在做什么RegEx：

Debuggex：在线可视正则表达式测试器。 JavaScript，Python和PCRE。 [ ^ ]

will match a mix of letters and digits.

Regex Class (System.Text.RegularExpressions)[^]
Regular Expression Language - Quick Reference[^]
Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx:
Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]

您的问题需要明确。假设您需要进行某种验证，我建议使用正则表达式，您可以在其中定义匹配模式并进行验证。





下面是匹配整数和字符串的示例代码。

Your question need to be clear . Assuming you need to do some sort of validation I would suggest to use regular expression , where you can define the pattern for matching and do a validation .


Below a sample code for matching integers and strings .

// Create the regular expression
           string pattern = @"^\w+

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