电话号码格式问题 [英] phone number formatting issue

问题描述

尝试使用以下方法将格式传递给我的电话号码，但不起作用
谁能解释

我的错误是

字符串"不包含子字符串"的定义，并且找不到找到接受字符串"类型的第一个参数的扩展方法子字符串"(您是否缺少using指令或程序集引用?)

模型

try to use the following method to pass the format to my phone number,butis not work
can anybody explain

the error i have is

''string'' does not contain a definition for ''substring'' and no extension method ''substring'' accepting a first argument of type ''string'' could be found (are you missing a using directive or an assembly reference?)

the model

public class ViewModel
   {

      
      

       private string formatPhoneNumber(string phone)
       {
        

           //should return [phone]
           return string.Format("({0})-{1}-{2}");
       }

   }

推荐答案

总体而言，您的工作方式根本是错误的.查看MSDN帮助页面并查看正确的拼写是否如此困难?好吧，现在看看:
http://msdn.microsoft.com/en-us/library/system.string. substring.aspx [ ^ ].

请不要冒犯:您真正需要学习的是: Microsoft Q209354 .

—SA

Something is fundamentally wrong with your approach to work in general. Was it so difficult to look at the MSDN help page and see the right spelling? Well, take a look now:
http://msdn.microsoft.com/en-us/library/system.string.substring.aspx[^].

Please, no offense: what you really need to learn is this: Microsoft Q209354.

—SA

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