Question

所以，我有一个方法，我设置一个日期并将其存储在一个名为gameTime的变量中。这样可行。但是现在我创建了另一种方法，我希望在控制台中显示该变量并编写 Console.WriteLine（gameTime）; ，但这不被接受。它说，它在目前的背景下并不令人兴奋。我需要做什么才能在其他方法中使其可访问？这是代码......

public class TimeSimulation
{
    public int Second { get; set; }
    public int Minute { get; set; }
    public int Hour { get; set; }
    public int Day { get; set; }
    public int Month { get; set; }
    public int Year { get; set; }



    public static void TimeSettings()
    {
        TimeSimulation startTime = new TimeSimulation();
        startTime.Second = 1;
        startTime.Minute = 1;
        startTime.Hour = 1;
        startTime.Day = 1;
        startTime.Month = 1;
        startTime.Year = 2000;

        DateTime gameTime = new DateTime(startTime.Year, startTime.Month, startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
    }

    public static void ShowTime()
    {
        //DateTime gameTime = new DateTime(startTime.Year, startTime.Month, startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
        Console.WriteLine(gameTime);
    }

Answer 1

因为您的变量gameTime仅存在于TimeSettings方法中。

尝试在方法之外取出它并将其声明为如下字段：

DateTime gameTime;

public static void TimeSettings()
{
    TimeSimulation startTime = new TimeSimulation();
    startTime.Second = 1;
    startTime.Minute = 1;
    startTime.Hour = 1;
    startTime.Day = 1;
    startTime.Month = 1;
    startTime.Year = 2000;

    DateTime gameTime = new DateTime(startTime.Year, startTime.Month, startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
}

public static void ShowTime()
{
    //DateTime gameTime = new DateTime(startTime.Year, startTime.Month, 
    if(gameTime != null)
    {
        startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
        Console.WriteLine(gameTime);
    }
}

编辑：我的猜测是，某个地方有一个错位的括号，因为您正在从其内部创建另一个TimeSimulation类的实例。

public class TimeSimulation
{
    public int Second { get; set; }
    public int Minute { get; set; }
    public int Hour { get; set; }
    public int Day { get; set; }
    public int Month { get; set; }
    public int Year { get; set; }
} // I think this bracket was missing..

static DateTime gameTime;

public static void TimeSettings()
{
    TimeSimulation startTime = new TimeSimulation();
    startTime.Second = 1;
    startTime.Minute = 1;
    startTime.Hour = 1;
    startTime.Day = 1;
    startTime.Month = 1;
    startTime.Year = 2000;

    gameTime = new DateTime(startTime.Year, startTime.Month, startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
}

public static void ShowTime()
{
    //DateTime gameTime = new DateTime(startTime.Year, startTime.Month, 
    if(gameTime != null)
    {
        startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
        Console.WriteLine(gameTime);
    }
}

Answer 2

这是因为您在第一个方法中创建了gameTime，因此只能在这些范围内访问{和}。如果要从ShowTime()访问它，则必须将其置于范围之外。你可以这样做：

public static DateTime gameTime { get; set; }
public void TimeSettings()
{
    TimeSimulation startTime = new TimeSimulation();
    startTime.Second = 1;
    startTime.Minute = 1;
    startTime.Hour = 1;
    startTime.Day = 1;
    startTime.Month = 1;
    startTime.Year = 2000;

    gameTime = new DateTime(startTime.Year, startTime.Month, startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
}

public void ShowTime()
{
    //DateTime gameTime = new DateTime(startTime.Year, startTime.Month, startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
    Console.WriteLine(gameTime);
}

请注意，您的方法不能以这种方式保持静态。如果必须这样，你可以这样调用gameTime：

CLASSNAME.gameTime

Answer 3

如果要在另一个

中使用它，必须在函数中返回值

public static DateTime TimeSettings()
{
    TimeSimulation startTime = new TimeSimulation();
    startTime.Second = 1;
    startTime.Minute = 1;
    startTime.Hour = 1;
    startTime.Day = 1;
    startTime.Month = 1;
    startTime.Year = 2000;

    return gameTime = new DateTime(startTime.Year, startTime.Month, startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
}

public static void ShowTime()
{
    DateTime gameTime = TimeSettings()
    Console.WriteLine(gameTime);
}

Answer 4

public class TimeSimulation
{
    public int Second { get; set; }
    public int Minute { get; set; }
    public int Hour { get; set; }
    public int Day { get; set; }
    public int Month { get; set; }
    public int Year { get; set; }

    private static DateTime gameTime; 



    public static void TimeSettings()
    {
        TimeSimulation startTime = new TimeSimulation();
        startTime.Second = 1;
        startTime.Minute = 1;
        startTime.Hour = 1;
        startTime.Day = 1;
        startTime.Month = 1;
        startTime.Year = 2000;

        gameTime = new DateTime(startTime.Year, startTime.Month,   startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
    }

    public static void ShowTime()
    {
        //DateTime gameTime = new DateTime(startTime.Year, startTime.Month, startTime.Day, startTime.Hour, startTime.Minute, startTime.Second);
        Console.WriteLine(gameTime);
    }
}

现在应该可以正常工作，因为“gameTime”现在是一个类级变量，而不是在TimeSettings方法中创建。

希望您确保在TimeSettings方法之后调用ShowTime。

仅供参考 - 这与问题的概念无关，但我想告诉TimeSettings方法的命名约定不正确。我更喜欢将其更改为“SetTimings（）”或“InitializeTimings（）”。

如何通过Console.WriteLine（）从另一个方法输出一个整数？

4 个答案: