C＃中Switch案例出错 [英] Error in the Switch case in C#

问题描述

Hello Experts，



我在这里做错了吗？我想我可能在while循环中遇到问题，因为所有的Console.WriteLine commang在该行之后用红色加下划线。

Hello Experts,

Am i doing something wrong here pls? I think i might have a problem in the while loop since all the Console.WriteLine commangs are underlined in red after that line.

namespace myDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            int option;
            bool state = true;
            public int Option
            {
                get
                {
                    return option;
                }
                set
                {
                    if (value == 0 || value > 16)
                    {
                         Console.WriteLine("Invalid Option");
                    }
                    else
                    {option = value;}
                }
            }

            while(state = true)
            {
                Console.WriteLine("Please Enter the Ocupation");
                Console.WriteLine("1. Director");
                Console.WriteLine("2. Councilor");
                Console.Clear();
                Option = Console.ReadLine();


                switch(int Option)
                {
                    case 1:
                    {
                        Console.WriteLine("Displaying Director Options:");
                        Console.WriteLine("2. Display Students Details:");
                        Console.WriteLine("3. Display Councilors Details: ");
                        Console.WriteLine("4. Display Visits Details:");
                        Console.WriteLine("5. Add Student:");
                        Console.WriteLine("6. Remove Student:");
                        Console.WriteLine("7. Add Councilor:");
                        Console.WriteLine("8. Remove Councilor");
                        Console.WriteLine("9. Change Councilor Available Hours");
                        Console.WriteLine("10. Add Visit");

                    }


                }
            }
        }
    }
}

< br $> b $ b

屏幕截图： http://s2.postimage.org/osh5yy9op/Capture.jpg [ ^ ]

推荐答案

您好，



更改

Hi,

Change

switch(int Option)

进入：

into:

switch (Option)

另外，更改

Also, change

case 1:
{
       Console.WriteLine("Displaying Director Options:");
       Console.WriteLine("2. Display Students Details:");
       Console.WriteLine("3. Display Councilors Details: ");
       Console.WriteLine("4. Display Visits Details:");
       Console.WriteLine("5. Add Student:");
       Console.WriteLine("6. Remove Student:");
       Console.WriteLine("7. Add Councilor:");
       Console.WriteLine("8. Remove Councilor");
       Console.WriteLine("9. Change Councilor Available Hours");
       Console.WriteLine("10. Add Visit");

 }

进入：

into:

case 1:
       Console.WriteLine("Displaying Director Options:");
       Console.WriteLine("2. Display Students Details:");
       Console.WriteLine("3. Display Councilors Details: ");
       Console.WriteLine("4. Display Visits Details:");
       Console.WriteLine("5. Add Student:");
       Console.WriteLine("6. Remove Student:");
       Console.WriteLine("7. Add Councilor:");
       Console.WriteLine("8. Remove Councilor");
       Console.WriteLine("9. Change Councilor Available Hours");
       Console.WriteLine("10. Add Visit");
       break;

你不需要使用括号。不要忘记 break; 在开关结束前的下一个 case 之前。

在此处阅读更多关于开关：

http://msdn.microsoft.com/en-us/library/06tc147t%28v=vs.110 ％29.aspx [ ^ ]







另外，更改此：

You don''t need to use brackets. Don''t forget break; before a next case of before the end of the switch.
Read more about switch here:
http://msdn.microsoft.com/en-us/library/06tc147t%28v=vs.110%29.aspx[^]



Also, change this:

Option = Console.ReadLine();

到此：

into this:

try
{
      Option = Convert.ToInt32(Console.ReadLine());
}
catch
{
      Console.WriteLine("Input string isn't in a correct format.");
     continue; // use 'continue' only in a loop
}

对不起，但是在看到之后我发现了一些错误你的屏幕截图。

首先：

I''m sorry, but I found a few mistakes after I saw your screen shot.
First:

public int Option
           {
               get
               {
                   return option;
               }
               set
               {
                   if (value == 0 || value > 16)
                   {
                        Console.WriteLine("Invalid Option");
                   }
                   else
                   {option = value;}
               }
           }

您可以在函数中创建属性。那是不可能的。了解有关房产的更多信息：

http：/ /msdn.microsoft.com/en-us/library/x9fsa0sw%28v=vs.80%29.aspx [ ^ ]

第二名：

Don'使用

You create a property INTO a function. That''s not possible. Read more about properties:
http://msdn.microsoft.com/en-us/library/x9fsa0sw%28v=vs.80%29.aspx[^]
Second:
Don''t use

while (state = true)

使用

Use

while (state == true)

了解有关 == 运营商：

http://msdn.microsoft.com/ en-us / library / 53k8ybth.aspx [ ^ ]

while (state = true)

总是 true ，你的意思是：

is always true, you mean:

while (state == true)

鉴于上述内容和您的链接，我认为您应该花一些时间重读C＃表达式和语句的参考指南。

Given the above, and your link, I think you should spend some more time rereading your reference guide on C# expressions and statements.

这篇关于C＃中Switch案例出错的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！