C#:如何访问对象实例?
我创建了一个带有计时器的splash类,当计时器完成时,它会引用另一个类,如下面的代码所示。当我创建一个新类时,如何访问MainWindowC#:如何访问对象实例?,c#,C#,我创建了一个带有计时器的splash类,当计时器完成时,它会引用另一个类,如下面的代码所示。当我创建一个新类时,如何访问MainWindow namespace Kinetics { public class KineticsCommand : RMA.Rhino.MRhinoCommand { Splash Splash = new Splash(); Splash.Show(); } public partial class Sp
namespace Kinetics
{
public class KineticsCommand : RMA.Rhino.MRhinoCommand
{
Splash Splash = new Splash();
Splash.Show();
}
public partial class Splash : Form
{
public Splash()
{
InitializeComponent();
}
private void timer1_Tick(object sender, EventArgs e)
{
this.Close();
MainUI MainWindow = new MainUI();
MainWindow.Show();
}
}
public class CustomEventWatcher : MRhinoEventWatcher
{
public override void OnReplaceObject(ref MRhinoDoc doc, ref MRhinoObject old, ref MRhinoObject obj)
{
// How can i access the class from here?
}
}
}
您需要将
MainWindow
作为实例或静态变量,而不是方法变量。这将允许从多个类访问它,只要它标记为public
使用静态工厂方法或属性(属性如下所示)
新编辑版本,带单例:
namespace Kinetics {
public class KineticsCommand : RMA.Rhino.MRhinoCommand
{
Splash splashVariable= Splash.SingletonInstance;
splashVariable.Show();
// or, combine and just write...
Splash.SingletonInstance.Show();
}
public partial class Splash : Form
{
private Splash splsh;
private Splash()
{
InitializeComponent();
}
public static Splash SingletonInstance // Factory property
{
get { return splsh?? (splsh = new Splash()); }
}
// Factory Method would be like this:
public static Splash GetSingletonInstance() // Factory method
{
return splsh?? (splsh = new Splash());
}
private void timer1_Tick(object sender, EventArgs e)
{
this.Close();
MainUI MainWindow = new MainUI();
MainWindow.Show();
}
}
public class CustomEventWatcher : MRhinoEventWatcher
{
public override void OnReplaceObject(ref MRhinoDoc doc,
ref MRhinoObject old, ref MRhinoObject obj)
{
// to access the instance of the class from here, now
// all you need to do is call the static factory property
// defined on the class itself.
Splash.SingletonInstance.[Whatever];
}
}
旧版本,使用Splash变量:无论在哪里调用该方法,都将该变量传递给它
名称空间动力学{
public class KineticsCommand : RMA.Rhino.MRhinoCommand
{
Splash splashVariable= new Splash();
splashVariable.Show();
}
public partial class Splash : Form
{
public Splash()
{
InitializeComponent();
}
private void timer1_Tick(object sender, EventArgs e)
{
this.Close();
MainUI MainWindow = new MainUI();
MainWindow.Show();
}
}
public class CustomEventWatcher : MRhinoEventWatcher
{
public override void OnReplaceObject(ref MRhinoDoc doc,
ref MRhinoObject old, ref MRhinoObject obj,
Splash splashScreen)
{
// to access the instance of the class from here,
// pass in the variable that holds a reference to the instance
splashScreen.[Whatever];
}
}
CustomEventWatcher将需要对MainWindow的引用,例如通过CustomEventWatcher中的属性:
public class CustomEventWatcher : MRhinoEventWatcher
{
MainUI _mainUI = null;
public MainUI MainWindow { get { return _mainUI; } set { _mainUI = value; } }
public override void OnReplaceObject(ref MRhinoDoc doc, ref MRhinoObject old, ref MRhinoObject obj)
{
if(_mainUI != null)
_mainUI.Whatever();
}
}
public partial class Splash : Form
{
public Splash()
{
InitializeComponent();
}
private void timer1_Tick(object sender, EventArgs e)
{
this.Close();
MainUI MainWindow = new MainUI();
CustomEventWatcher cew = new CustomEventWatcher();
cew.MainWindow = MainWindow;
MainWindow.Show();
}
}
但是覆盖不支持比前3个参数更多的参数,那么我该怎么办?如果这是您的代码,您可以添加另一个覆盖吗?如果不是,请将启动屏幕设置为具有工厂的单例(请参阅我编辑的版本)我还建议您使用MainUIInterface,否则它会让您感觉到类之间的依赖关系,假设明天您想显示另一个窗口,您唯一需要做的就是在新窗口中实现此接口。。。