如何从类导航到xaml页面 [英] How to navigate to a xaml page from class

问题描述

在我的应用程序中，我有一个类Chronometer使用dispatcherTimer和Tick方法。每秒，一个变量减少。

我想这个变量的值为0时，一个新的xaml页面加载。

我尝试使用 NavigationService ，但此方法仅适用于xaml.cs文件。

我的xaml页面，当变量减少时是可见的：WordPage.xaml
我想显示的xaml页面是：FinalPage.xaml

你能实现我想要的吗？请帮助我

编辑：

我的类的构造函数是：

public Chrono（DispatcherTimer newTimer，TextBlock chrono，TextBlock NumEquip，P1 page1）
{
//零件已清除
m_page1 = page1;
}


，对象Chrono的实例是：

  MonChrono = new Chrono（newTimer，this.TimeLabel，this）; 
  

解决方案

您不能创建 NavigationService ，这是主要的问题。但您可以将页面对象作为参数传递，并访问其 NavigationService.Property

  public void NavigateToPage（YouPageClass page）
 {
 page.NavigationService.Navigate（new Uri（/ Pages / PageToNavigateTo.xaml，
 UriKind.RelativeOrAbsolute））; 
} 
  

示例项目： http://www.abouchleih.com/wp-content/uploads/TestNavigationFromClass.zip

编辑：
我找到了一个更好的解决方案。

您的班级中的方法：

  public static void Nav（NavigationService，Uri destination）
 {
 s.Navigate（destination）; 
} 
  

从页面调用：

  private void button_navigateTo_Click（object sender，RoutedEventArgs e）
 {
 NavService.Nav（this.NavigationService，new Uri（/ PageToNavigateTo.xaml， UriKind.RelativeOrAbsolute））; 
} 
  

In my application, I have a class Chronometer which use a dispatcherTimer and Tick method. Each second, a variable decrease.

I would like that when the value of the variable is 0, a new xaml page is load.

I try to use NavigationService but this method work only in a xaml.cs file.

My xaml page which is visible when the variable decrease is : WordPage.xaml The xaml page that i want to display is : FinalPage.xaml

Can you realize what I want? Please help me

EDIT :

My constructor of my class is :

public Chrono(DispatcherTimer newTimer, TextBlock chrono, TextBlock NumEquip, P1 page1)
    {
     //Part effaced
     m_page1 = page1;
    }

and the instanciation of the object Chrono is :

MonChrono = new Chrono(newTimer, this.TimeLabel,  this);

解决方案

You cannot create an instance of NavigationService, that's the main problem. But you could possibly pass your page object as a parameter and access its NavigationService.Property

public void NavigateToPage(YouPageClass page)
{
    page.NavigationService.Navigate(new Uri("/Pages/PageToNavigateTo.xaml",
        UriKind.RelativeOrAbsolute));
}

Sample project: http://www.abouchleih.com/wp-content/uploads/TestNavigationFromClass.zip

Edit: I found a better solution. Don't pass the page object, bette pass it's NavigationService-Property, now you can simply call the same method from multiple pages.

Method in your class:

public static void Nav(NavigationService s, Uri destination)
{
    s.Navigate(destination);
}

Call from a page:

private void button_navigateTo_Click(object sender, RoutedEventArgs e)
{
    NavService.Nav(this.NavigationService, new Uri("/PageToNavigateTo.xaml", UriKind.RelativeOrAbsolute));
}

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