预期的类，委托，枚举，接口或结构 [英] Expected class,delegate,enum, interface,or struct

问题描述

错误预期的类，委托，枚举，接口或结构，我无法检测到什么是问题。



代码添加的评论：

Error Expected class, delegate, enum, interface, or struct,i am unable to detect what can be issues.

Code added from comment:

////code with error///
public class Class1
    {
        private CardType _cardTypes;

     }
        public bool IsValidCardType(string cardNumber)
        {
            // AMEX -- 34 or 37 -- 15 length
            if ((Regex.IsMatch(cardNumber, "^(34|37)")) && ((_cardTypes & CardType.Amex) != 0))
                return (15 == cardNumber.Length);


                // MasterCard -- 51 through 55 -- 16 length
            else if ((Regex.IsMatch(cardNumber, "^(51|52|53|54|55)")) && ((_cardTypes & CardType.MasterCard) != 0))
                return (16 == cardNumber.Length);

                // VISA -- 4 -- 13 and 16 length
            else if ((Regex.IsMatch(cardNumber, "^(4)")) && ((_cardTypes & CardType.VISA) != 0))
                return (13 == cardNumber.Length || 16 == cardNumber.Length);

                // Diners Club -- 300-305, 36 or 38 -- 14 length
            else if ((Regex.IsMatch(cardNumber, "^(300|301|302|303|304|305|36|38)")) && ((_cardTypes & CardType.DinersClub) != 0))
                return (14 == cardNumber.Length);

                // enRoute -- 2014,2149 -- 15 length
            else if ((Regex.IsMatch(cardNumber, "^(2014|2149)")) && ((_cardTypes & CardType.DinersClub) != 0))
                return (15 == cardNumber.Length);

                // Discover -- 6011 -- 16 length
            else if ((Regex.IsMatch(cardNumber, "^(6011)")) && ((_cardTypes & CardType.Discover) != 0))
                return (16 == cardNumber.Length);

                // JCB -- 3 -- 16 length
            else if ((Regex.IsMatch(cardNumber, "^(3)")) && ((_cardTypes & CardType.JCB) != 0))
                return (16 == cardNumber.Length);

                // JCB -- 2131, 1800 -- 15 length
            else if ((Regex.IsMatch(cardNumber, "^(2131|1800)")) && ((_cardTypes & CardType.JCB) != 0))
                return (15 == cardNumber.Length);
            else
            {
                // Card type wasn't recognised, provided Unknown is in the CardTypes property, then
                // return true, otherwise return false.
                if ((_cardTypes & CardType.Unknown) != 0)
                    return true;
                else
                    return false;
            }
        }

推荐答案

预期的类，代表，枚举，接口或struct



您没有在命名空间中声明这些元素。

我建议你得到一个关于C＃/ ASP.NET基础知识的书。

Expected class, delegate, enum, interface, or struct

You didn't declare of of these elements in your namespace.
I suggest you get a book on C#/ASP.NET basics.

它实际上可以是任何东西。缺少分号，缺少程序集引用，语法不正确等。无法看到您的代码使得无法提供更具体的帮助。

It could literally be anything. A missing semi-colon, a missing assembly reference, incorrect syntax, and other things. Not being able to see your code makes it impossible to provide more specific assistance.

此消息的最可能原因是您编写的代码应该在类，委托，枚举中，接口或结构直接进入命名空间范围。这通常是由额外的一个右大括号（'}'）导致你的范围变得有点棘手



请采取以下措施：

The most likely cause of this message is that you have written code that should be within a class, delegate, enum, interface or struct directly into the namespace scope. This is often caused by an extra a closing brace ('}') causing your scoping to go a bit screwy

take the following:

namespace xxxx
{
    public class yyyy
    {
       public method zzzz()
       {
          //blah
       }

       public method qqqqq()
       {
       }
    }
}

如果我要加一个额外的}：

if i were to add an extra } :

namespace xxxx
{
    public class yyyy
    {
       public method zzzz()
       {
          //blah
       } // this shouldnt be here
       }//this becomes the closing brace of the class rather than the method

       public method qqqqq() // this method is now outside the class!!
       {
       }
    }
}

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