将REF关键字扩展到另一个变量

Question

我正在开发WPF应用程序。

我正在尝试使用REF关键字通过引用传递对象，然后将其传递给构造函数中的另一个变量以稍后更改。但是，当我更改通过构造函数可变中参考的变量时，不会在范围外变化。

要解释，首先我创建变量并将其传递到另一个窗口的构造函数。

private void LocatonEditButton_Click(object sender, RoutedEventArgs e)
    {
        var location = new Location(SelectedLocation.Name, SelectedLocation.X, SelectedLocation.Y, SelectedLocation.Update); 
        //Creating object
        var result =  new EditWindow(ref location,true).ShowDialog();
        //And passing it to another window with ref
    }

在这里，我将变量分配给初始定位，如果我尝试在此处更改它，则可以在外部变量上使用。

 public partial class EditWindow : Window
{
    public EditWindow(ref Location location, bool isEdit)
    {
        InitializeComponent();
        InitialLocation = location;
        //InitialLocation = ref location; //This is what I want my code to do 
        location.Name = "new"; //this changes varaiable outside scope
    }
    private Location InitialLocation;

在这里我更改初始定位，但更改不能在范围之外牢固。

    private void ConfirmButton_Click(object sender, RoutedEventArgs e)
    {
        InitialLocation = new Location(CurrentLocation.Name, CurrentLocation.X, CurrentLocation.Y, InitialLocation.Update);
        //But this doesn't change varaible outside scope
        this.Close();
    }

我想保留与Ref通过的对象，直到将其传递给的窗口被处置为止。可以在不等待封闭活动的情况下做吗？

Answer 1

我建议将初始定位声明为公共财产。

public partial class EditWindow : Window
{
    public EditWindow(Location location, bool isEdit)
    {
        InitializeComponent();
        InitialLocation = location;
        location.Name = "new";
    }
    public Location InitialLocation { get; set; }
    private void ConfirmButton_Click(object sender, RoutedEventArgs e)
    {
        InitialLocation = new Location(CurrentLocation.Name, CurrentLocation.X, CurrentLocation.Y, InitialLocation.Update);
        this.Close();
    }
}

编辑后阅读该属性的值：

private void LocatonEditButton_Click(object sender, RoutedEventArgs e)
{
    var location = new Location(SelectedLocation.Name, SelectedLocation.X, SelectedLocation.Y, SelectedLocation.Update); 
    var editWindow = new EditWindow(location, true);
    var result = editWindow.ShowDialog();
    var changedLocation = editWindow.InitialLocation;
}