Question

我编写了以下代码，其中IsClear，IsPermanent和IsSalaried为真。 IsSalaried是一个可以为空的布尔值。我期待像"Clear,Permanent,Salaried"这样的输出。但它仅将输出设为"Clear"。任何人都可以帮助我理解以下概念：

using System;

public class Program
{
    public static void Main()
    {
        MyClass Employee = new MyClass();
        Employee.IsClear = true;
        Employee.IsPermanent = true;
        Employee.IsSalaried = true;

        string Test =  
             Employee.IsClear ? "Clear" : ""
            + (Employee.IsPermanent ? "Permanent" : "") 
            + (Employee.IsSalaried.HasValue ? "Salaried" : "");

        Console.WriteLine(Test);
    }
}

public class MyClass
{
    public bool IsClear { get; set; }
    public bool IsPermanent { get; set; }
    public bool? IsSalaried { get; set; }
}

提前致谢!!

Answer 1

这应该会产生编译错误，因为Test在右侧未初始化！以下应该有效：

    static void Main(string[] args)
    {
        bool a = true;
        bool b = true;
        bool c = true;
        string x = "";
        string Test = x + (a ? "Clear" : "") + (b ? "Permanent" : "") + (c ? "Salaried" : "");
        Console.WriteLine(Test);

        Console.ReadLine(); //so that my console window doesn't close

    }

在字符串连接中理解

1 个答案: