C# 使用Structs查找雇员而不使用这么多条件语句

我已经为我的学校项目计划写了这段代码（它仍然不完整），但它在大部分情况下完成了这项工作。问题是，我们必须使用structs来创建一个预定义员工的程序，然后我们必须创建它，这样我们就可以使用任何属性（姓名、员工ID、血型、年龄等）来搜索所有员工

我发现了一种使用条件语句的方法（目前，它适用于name和employee ID）。我已经意识到代码太长了，可能有另一种方法可以搜索整个程序。当我们使用性别作为搜索属性时，我还想让它显示所有男性/女性员工

这是我的密码：

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    
    namespace Terminals
    {
        class Program
    
    
        {
            struct Employee
            {
                public string Name;
                public int EmployeeID;
                public string BloodGroup;
                public int Salary;
                public int Age;
                public string Gender;
            }
            static void Main(string[] args)
            {
                Employee employee1;
                Employee employee2;
                Employee employee3;
                Employee employee4;
                Employee employee5;
                Employee employee6;
    
                employee1.Name = "James";
                employee1.EmployeeID = int.Parse("10");
                employee1.BloodGroup = "B +ive";
                employee1.Salary = int.Parse("500000");
                employee1.Age = int.Parse("26");
                employee1.Gender = "Male";
    
                employee2.Name = "Ali Khan";
                employee2.EmployeeID = int.Parse("20");
                employee2.BloodGroup = "O +ive";
                employee2.Salary = int.Parse("250000");
                employee2.Age = int.Parse("22");
                employee2.Gender = "Male";
    
                employee3.Name = "Jessica Hills";
                employee3.EmployeeID = int.Parse("30");
                employee3.BloodGroup = "A -ive";
                employee3.Salary = int.Parse("400000");
                employee3.Age = int.Parse("25");
                employee3.Gender = "Female";
    
                employee4.Name = "William";
                employee4.EmployeeID = int.Parse("40");
                employee4.BloodGroup = "O -ive";
                employee4.Salary = int.Parse("700000");
                employee4.Age = int.Parse("29");
                employee4.Gender = "Male";
    
                employee5.Name = "Lizzy";
                employee5.EmployeeID = int.Parse("50");
                employee5.BloodGroup = "AB +ive";
                employee5.Salary = int.Parse("70000");
                employee5.Age = int.Parse("19");
                employee5.Gender = "Female";
    
                employee6.Name = "Kyle";
                employee6.EmployeeID = int.Parse("60");
                employee6.BloodGroup = "AB -ive";
                employee6.Salary = int.Parse("600000");
                employee6.Age = int.Parse("21");
                employee6.Gender = "Male";
    
                Console.WriteLine("Please enter the number of the term you would like to search with (1-6)?");
                Console.WriteLine("1. Name");
                Console.WriteLine("2. Employee ID");
                Console.WriteLine("3. Blood Group");
                Console.WriteLine("4. Salary");
                Console.WriteLine("5. Age");
                Console.WriteLine("6. Gender");
                Console.WriteLine("Please enter the number (1-6): ");
                int searchterm = int.Parse(Console.ReadLine());
                if (searchterm == 1)
                {
                    Console.WriteLine("Please enter the name of the employee: ");
                    string name = Console.ReadLine();
                    if (name == employee1.Name)
                    {
                        Console.Write("Name: " + employee1.Name);
                        Console.WriteLine("Employee ID: " + employee1.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee1.BloodGroup);
                        Console.WriteLine("Salary: " + employee1.Salary);
                        Console.WriteLine("Age: " + employee1.Age);
                        Console.WriteLine("Gender: " + employee1.Gender);
                        Console.ReadKey();
                    }
                    else if (name == employee2.Name)
                    {
                        Console.Write("Name: " + employee2.Name);
                        Console.WriteLine("Employee ID: " + employee2.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee2.BloodGroup);
                        Console.WriteLine("Salary: " + employee2.Salary);
                        Console.WriteLine("Age: " + employee2.Age);
                        Console.WriteLine("Gender: " + employee2.Gender);
                        Console.ReadKey();
                    }
                    else if (name == employee3.Name)
                    {
                        Console.Write("Name: " + employee3.Name);
                        Console.WriteLine("Employee ID: " + employee3.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee3.BloodGroup);
                        Console.WriteLine("Salary: " + employee3.Salary);
                        Console.WriteLine("Age: " + employee3.Age);
                        Console.WriteLine("Gender: " + employee3.Gender);
                        Console.ReadKey();
                    }
                    else if (name == employee4.Name)
                    {
                        Console.Write("Name: " + employee4.Name);
                        Console.WriteLine("Employee ID: " + employee4.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee4.BloodGroup);
                        Console.WriteLine("Salary: " + employee4.Salary);
                        Console.WriteLine("Age: " + employee4.Age);
                        Console.WriteLine("Gender: " + employee4.Gender);
                        Console.ReadKey();
                    }
                    else if (name == employee5.Name)
                    {
                        Console.Write("Name: " + employee5.Name);
                        Console.WriteLine("Employee ID: " + employee5.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee5.BloodGroup);
                        Console.WriteLine("Salary: " + employee5.Salary);
                        Console.WriteLine("Age: " + employee5.Age);
                        Console.WriteLine("Gender: " + employee5.Gender);
                        Console.ReadKey();
                    }
                    else if (name == employee6.Name)
                    {
                        Console.Write("Name: " + employee1.Name);
                        Console.WriteLine("Employee ID: " + employee6.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee6.BloodGroup);
                        Console.WriteLine("Salary: " + employee6.Salary);
                        Console.WriteLine("Age: " + employee6.Age);
                        Console.WriteLine("Gender: " + employee6.Gender);
                        Console.ReadKey();
                    }
                    else
                    {
                        Console.WriteLine("Please try again.");
                        return;
    
                    }
                }
    
                if (searchterm == 2)
                {
                    Console.WriteLine("Please enter the employee ID of the employee");
                    int employeeid = int.Parse(Console.ReadLine());
                    if (employeeid == employee1.EmployeeID)
                    {
                        Console.Write("Name: " + employee1.Name);
                        Console.WriteLine("Employee ID: " + employee1.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee1.BloodGroup);
                        Console.WriteLine("Salary: " + employee1.Salary);
                        Console.WriteLine("Age: " + employee1.Age);
                        Console.WriteLine("Gender: " + employee1.Gender);
                        Console.ReadKey();
                    }
                    else if (employeeid == employee2.EmployeeID)
                    {
                        Console.Write("Name: " + employee2.Name);
                        Console.WriteLine("Employee ID: " + employee2.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee2.BloodGroup);
                        Console.WriteLine("Salary: " + employee2.Salary);
                        Console.WriteLine("Age: " + employee2.Age);
                        Console.WriteLine("Gender: " + employee2.Gender);
                        Console.ReadKey();
                    }
                    else if (employeeid == employee3.EmployeeID)
                    {
                        Console.Write("Name: " + employee3.Name);
                        Console.WriteLine("Employee ID: " + employee3.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee3.BloodGroup);
                        Console.WriteLine("Salary: " + employee3.Salary);
                        Console.WriteLine("Age: " + employee3.Age);
                        Console.WriteLine("Gender: " + employee3.Gender);
                        Console.ReadKey();
                    }
                    else if (employeeid == employee4.EmployeeID)
                    {
                        Console.Write("Name: " + employee4.Name);
                        Console.WriteLine("Employee ID: " + employee4.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee4.BloodGroup);
                        Console.WriteLine("Salary: " + employee4.Salary);
                        Console.WriteLine("Age: " + employee4.Age);
                        Console.WriteLine("Gender: " + employee4.Gender);
                        Console.ReadKey();
                    }
                    else if (employeeid == employee5.EmployeeID)
                    {
                        Console.Write("Name: " + employee5.Name);
                        Console.WriteLine("Employee ID: " + employee5.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee5.BloodGroup);
                        Console.WriteLine("Salary: " + employee5.Salary);
                        Console.WriteLine("Age: " + employee5.Age);
                        Console.WriteLine("Gender: " + employee5.Gender);
                        Console.ReadKey();
                    }
                    else if (employeeid == employee6.EmployeeID)
                    {
                        Console.Write("Name: " + employee6.Name +"   ");
                        Console.WriteLine("Employee ID: " + employee6.EmployeeID);
                        Console.WriteLine("Blood Group: " + employee6.BloodGroup);
                        Console.WriteLine("Salary: " + employee6.Salary);
                        Console.WriteLine("Age: " + employee6.Age);
                        Console.WriteLine("Gender: " + employee6.Gender);
                        Console.ReadKey();
                    }
                    else
                    {
                        Console.WriteLine("Please try again.");
                        Console.ReadKey();
                        return;
                        
                    }
    
    
    
    
                }
    
            }
    
        }
    }

---

正如其他人所说，LINQ将是您在这里的朋友，使用一个集合，如

列表

也会有很大帮助。您可以消除

else if

逻辑，并将代码大大缩短

对于

Employee emp=employeeList.Find（Employee=>Employee.Name==Name）行，您需要根据用户输入，通过正确的结构成员将谓词更改为
Find
。如果无法从列表中找到
员工
，则
其他
逻辑将报告该情况（这也需要针对每个搜索条件）。我还添加了一个私有方法来为员工列表添加种子。一个包含所有控制台输出行的简单方法也将进一步缩短此时间-只需向其提供找到的
Employee

唯一的问题是，如果两个或两个以上的员工对其中一个成员具有相同的价值。除了
性别
，您的种子员工似乎没有任何共同点，在这种情况下，您需要筛选其他属性以将其缩小到一名员工，或者根据搜索条件输出所有找到的员工
.Find
将返回与条件匹配的第一个员工，因此这将不起作用（或者至少，它将只输出第一个找到的员工！）您可以将此代码更改为使用
.FindAll
，然后将新的
列表
传递给私有方法，并循环遍历列表中的所有员工，输出他们的每个信息。重载
ValidateEmployee
方法，我写了一个
列表
，应该可以解决这个问题。您可以让所有条件执行
.FindAll
并删除
ValidateEmployee
方法，该方法接收单个
员工
，具体取决于您

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

namespace Terminals
{
    class Program
    {
        struct Employee
        {
            public string Name;
            public int EmployeeID;
            public string BloodGroup;
            public int Salary;
            public int Age;
            public string Gender;
        }
        static void Main(string[] args)
        {
            List<Employee> employeeList = SeedEmployees();

            Console.WriteLine("Please enter the number of the term you would like to search with (1-6):");
            Console.WriteLine("1. Name");
            Console.WriteLine("2. Employee ID");
            Console.WriteLine("3. Blood Group");
            Console.WriteLine("4. Salary");
            Console.WriteLine("5. Age");
            Console.WriteLine("6. Gender");
            Console.WriteLine("Please enter the number (1-6): ");
            int searchterm = int.Parse(Console.ReadLine());

            if (searchterm == 1)
            {
                Console.WriteLine("Please enter the name of the employee: ");
                string name = Console.ReadLine();
                Employee emp = employeeList.Find(employee => employee.Name == name);

                ValidateEmployee(emp);
            }
            else if (searchterm == 6)
            {
                Console.WriteLine("Please enter the gender of the employee: ");
                string gender = Console.ReadLine();
                List<Employee> emps = employeeList.FindAll(employee => employee.Gender == gender);

                ValidateEmployee(emps);
            }

            //the rest of your "if" conditions for search terms...

            else
            {
                Console.WriteLine("Please try again.");
                Console.ReadKey();
                return;
            }

            Console.WriteLine("Done. Press any key to exit...");
            Console.ReadLine();
        }

        private static void ValidateEmployee(Employee emp)
        {
            if (emp.Equals(default(Employee)))
            {
                //employee not found
                Console.WriteLine($"Employee not found by supplied input. Please try again.");
                Console.ReadLine();
                return;
            }
            else
            {
                //output the emplyee info
                OutputEmployeeInfo(emp);
            }
        }

        private static void ValidateEmployee(List<Employee> emps)
        {
            foreach (Employee emp in emps)
            {
                if (emp.Equals(default(Employee)))
                {
                    //employee not found
                    Console.WriteLine($"Employee not found by supplied input.");
                }
                else
                {
                    //output the emplyee info
                    OutputEmployeeInfo(emp);
                }
            }
        }

        private static void OutputEmployeeInfo(Employee employee)
        {
            Console.Write("Name: " + employee.Name);
            Console.WriteLine("Employee ID: " + employee.EmployeeID);
            Console.WriteLine("Blood Group: " + employee.BloodGroup);
            Console.WriteLine("Salary: " + employee.Salary);
            Console.WriteLine("Age: " + employee.Age);
            Console.WriteLine("Gender: " + employee.Gender);
            Console.ReadKey();
        }

        private static List<Employee> SeedEmployees()
        {
            Employee employee1;
            Employee employee2;
            Employee employee3;
            Employee employee4;
            Employee employee5;
            Employee employee6;

            employee1.Name = "James";
            employee1.EmployeeID = int.Parse("10");
            employee1.BloodGroup = "B +ive";
            employee1.Salary = int.Parse("500000");
            employee1.Age = int.Parse("26");
            employee1.Gender = "Male";

            employee2.Name = "Ali Khan";
            employee2.EmployeeID = int.Parse("20");
            employee2.BloodGroup = "O +ive";
            employee2.Salary = int.Parse("250000");
            employee2.Age = int.Parse("22");
            employee2.Gender = "Male";

            employee3.Name = "Jessica Hills";
            employee3.EmployeeID = int.Parse("30");
            employee3.BloodGroup = "A -ive";
            employee3.Salary = int.Parse("400000");
            employee3.Age = int.Parse("25");
            employee3.Gender = "Female";

            employee4.Name = "William";
            employee4.EmployeeID = int.Parse("40");
            employee4.BloodGroup = "O -ive";
            employee4.Salary = int.Parse("700000");
            employee4.Age = int.Parse("29");
            employee4.Gender = "Male";

            employee5.Name = "Lizzy";
            employee5.EmployeeID = int.Parse("50");
            employee5.BloodGroup = "AB +ive";
            employee5.Salary = int.Parse("70000");
            employee5.Age = int.Parse("19");
            employee5.Gender = "Female";

            employee6.Name = "Kyle";
            employee6.EmployeeID = int.Parse("60");
            employee6.BloodGroup = "AB -ive";
            employee6.Salary = int.Parse("600000");
            employee6.Age = int.Parse("21");
            employee6.Gender = "Male";

            return new List<Employee>
            {
                employee1,
                employee2,
                employee3,
                employee4,
                employee5,
                employee6
            };
        }
    }
}

使用系统；
使用System.Collections.Generic；
使用System.Linq；
使用系统文本；
使用System.Threading.Tasks；
名称空间终端
{
班级计划
{
结构雇员
{
公共字符串名称；
公共国际雇员ID；
公共团体；
公共收入；
公共信息；
社会性别；
}
静态void Main（字符串[]参数）
{
List employeeList=SeedEmployees（）；
Console.WriteLine（“请输入要搜索的术语的编号（1-6）：”；
Console.WriteLine（“1.名称”）；
Console.WriteLine（“2.员工ID”）；
控制台。书写线（“3.血型”）；
控制台。写线（“4.工资”）；
控制台。写入线（“5.年龄”）；
控制台。书写线（“6.性别”）；
Console.WriteLine（“请输入数字（1-6）：”；
int searchterm=int.Parse（Console.ReadLine（））；
if（searchterm==1）
{
Console.WriteLine（“请输入员工姓名：”）；
字符串名称=Console.ReadLine（）；
emp=employeeList.Find（Employee=>Employee.Name==Name）；
确认员工（emp）；
}
else if（searchterm==6）
{
Console.WriteLine（“请输入员工的性别：”）；
字符串性别=Console.ReadLine（）；
List emps=employeeList.FindAll（employee=>employee.Gender==Gender）；
确认员工（EMP）；
}
//搜索词的其他“如果”条件。。。
其他的
{
控制台。WriteLine（“请再试一次”）；
Console.ReadKey（）；
返回；
}
Console.WriteLine（“完成。按任意键退出…”）；
Console.ReadLine（）；
}
私有静态无效验证员工（员工emp）
{
如果（emp.等于（默认值（员工）））
{
//找不到员工
Console.WriteLine（$“未通过提供的输入找到员工。请重试。”）；
Console.ReadLine（）；
返回；
}
其他的
{
//输出员工信息
输出员工信息（emp）；
}
}
私有静态void ValidateEmployee（列出EMP）
{
foreach（emp中的员工emp）
{
如果（emp.等于（默认值（员工）））
{
//找不到员工
Console.WriteLine（$“未通过提供的输入找到员工。”）；
}
其他的
{
//输出员工信息
输出员工信息（emp）；
}
}
}
私有静态void OutputEmployeeInfo（员工）
{
Console.Write（“名称：“+employee.Name”）；
Console.WriteLine（“员工ID:+Employee.EmployeeID”）；
Console.WriteLine（“血型：+员工.血型”）；
Console.WriteLine（“工资：+员工工资”）；
控制台.WriteLine（“年龄：+employee.Age”）；
Console.WriteLine（“性别：”