本文介绍了找不到类型或命名空间名称''(您是否缺少using指令或程序集引用?)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在尝试使用列表来存储和显示数据,从而在控制台应用程序中构建联系人管理器程序。我需要查看显示可用联系人摘要的报告,然后有一个菜单允许用户与该程序进行交互。我有一个方法来创建一个联系人和一个联系人对象。我还有一种更新联系人的方法,但我想让用户能够选择联系人的名字,姓氏,电子邮件地址,电话号码,类型,并能够使用用户输入的信息进行更新。但是在这一行c1.GetContactType =(ContactTypes)Enum.Parse(typeof(ContactTypes),Console.ReadLine(),true);我一直收到错误:



无法找到类型或命名空间名称'ContactTypes'(您是否缺少using指令或程序集引用?)





I am trying to build a contact managers program in a console application using a list to store and display the data. I need to view a report that displays a summary of contacts available and then have a menu to allow the user to interact with the program. I have a method to create a contact and a contact object. I also have a method to update a contact but I want to have the user to be able to pick a contact first name, last name, email address, phone number, type and be able to update with the information the user entered. However on this line c1.GetContactType = (ContactTypes)Enum.Parse(typeof(ContactTypes), Console.ReadLine(), true); I keep getting the error:

The type or namespace name 'ContactTypes' could not be found (are you missing a using directive or an assembly reference?)


 public static void createContact()
{
    Contact c1 = new Contact();
    try {
    Console.WriteLine("\nGetFirstName");
    c1.GetFirstName =  Console.ReadLine();
        }
    catch (System.NullReferenceException)
    {
        Console.WriteLine("Contact create failed");
    }
    Console.WriteLine("\nGetLastName");
    c1.GetLastName = Console.ReadLine();
    Console.WriteLine("\nGetEmailAddress");
    c1.GetEmailAddress = Console.ReadLine();
    Console.WriteLine("\nGetPhoneNumber");
    c1.GetPhoneNumber = Console.ReadLine();
    Console.WriteLine("\nContactTypes");
     //ERROR LINE//
    c1.GetContactType = (ContactTypes)Enum.Parse(typeof(ContactTypes), Console.ReadLine(), true);

    //Create more contacts...

    //Add all contacts here
    ContactCollection contactList = new ContactCollection();
    contactList.Add(c1);

    //Loop through list
    foreach (Contact c in contactList)
    {

        Console.WriteLine(c.GetFirstName);
        Console.WriteLine(c.GetLastName);
        Console.WriteLine(c.GetEmailAddress);
        Console.WriteLine(c.GetPhoneNumber);
        Console.WriteLine(c.ContactTypes);

    }

    Console.ReadLine();

}



如果需要,这是我的联系课程




Here is my Contact class if needed

class Contact
    {

        //private member variables
        private String _firstName;
        private String _lastName;
        public ContactTypes _contactTypes;
        private String _phoneNumber;
        private String _emailAddress;




        //Public constructor that takes five arguments
        public Contact()
        {
            //Call the appropriate setter (e.g. FirstName) to set the member variable value
            /*GetFirstName = firstName;
            GetLastName = lastName;
            ContactTypes = contactTypes;
            GetPhoneNumber = phoneNumber;
            GetEmailAddress = emailAddress;*/

        }


        /*********************************************************************
         * Public accessors used to get and set private member variable values
         *********************************************************************/
        //Public  ContactTypes accessor
            public ContactTypes GetContactType
        {
            get
            {
                //Return member variable value
                return _contactTypes;
            }
            set
            {
                //Validate value and throw exception if necessary
                  if (value == " ")
           {
                    //throw new Exception("ContactType must have a value");
           }
                   else
           {
                    //Otherwise set member variable value
                    _contactTypes = value;
           }
            }
        }
        public enum ContactTypes { Family, Friend, Professional }
        //Public FirstName accessor: Pascal casing
        public String GetFirstName
        {
            get
            {
                //Return member variable value
                return _firstName;
            }
            set
            {
                //Validate value and throw exception if necessary
                if (value == "")
                {
                    throw new Exception("First name must have a value");
                }
                else
                {
                    //Otherwise set member variable value
                    _firstName = value;
                }
            }
        }

        //Public LastName accessor: Pascal casing
        public String GetLastName
        {
            get
            {
                //Return member variable value
                return _lastName;
            }
            set
            {
                //Validate value and throw exception if necessary
                if (value == "")
                    throw new Exception("Last name must have a value");
                else
                    //Otherwise set member variable value
                    _lastName = value;
            }
        }



        //Public PhoneNumber accessor
        public String GetPhoneNumber
        {
            get
            {
                //Return member variable value
                return _phoneNumber;
            }
            set
            {
                /*bool isValid = Regex.IsMatch(value, @"/d{3}-/d{3}-/d{4}");
                if (!isValid)
                {
                    throw new Exception("PhoneNumber must have a value");
                }
                else
                {
                    _phoneNumber = value;
                }*/
                //Validate value and throw exception if necessary
                if (value == "")
                {
                    throw new Exception("PhoneNumber must have a value");
                }
                else
                {
                    //Otherwise set member variable value
                    _phoneNumber = value;
                }
            }
        }



        //Public Email accessor
        public String GetEmailAddress
        {
            get
            {
                //Return member variable value
                return _emailAddress;
            }
            set
            {
                //Validate value and throw exception if necessary
                if (value == "")
                {
                    throw new Exception("EmailAddress must have a value");
                }
                else
                {
                    //Otherwise set member variable value
                    _emailAddress = value;
                }
            }
        }

    }

推荐答案

Contact.ContactTypes

代替

ContactTypes

当您想要调用此枚举时。

when you want to call this Enum.



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08-28 02:47
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