在 WPF 中从一个 xaml 导航到另一个
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Navigating from one xaml to another in WPF
提问by E_learner
Despite the fact that I am totally a fresh to WPF, I need to write a code, in which after I click a button, the application should open another xaml. After searching on the web, I did in in the following way:
尽管我对 WPF 完全陌生，但我需要编写代码，在其中单击按钮后，应用程序应该打开另一个 xaml。在网上搜索后，我是通过以下方式进行的：
1.I created two xaml files, namely 'Window1.xaml' and 'Window2.xaml'.
1.我创建了两个xaml文件，分别是“Window1.xaml”和“Window2.xaml”。
2.In my 'App.xaml' file, I let:
2.在我的“App.xaml”文件中，我让：
<Application x:Class="DiagramDesigner.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="Window1.xaml">
3.Then in my 'Window1.xaml', I created a button:
3.然后在我的“Window1.xaml”中，我创建了一个按钮：
<Button Name="Button" Click="Button_Click_1" MouseEnter="Button_MouseEnter_1" IsDefault="True"
HorizontalAlignment="Center" VerticalAlignment="Center">
Start
</Button>
4.In my "Windwo1.xaml.cs" file, I created these two functions:
4.在我的“Windwo1.xaml.cs”文件中，我创建了这两个函数：
private void Button_Click_1(object sender, RoutedEventArgs e)
{
}
private void Button_MouseEnter_1(object sender, MouseEventArgs e)
{
}
5.Then for opening "Window2.xaml" after clicking the button, I changed to:
5.然后点击按钮后打开“Window2.xaml”，我改为：
private void Button_Click_1(object sender, RoutedEventArgs e)
{
NavigationService service = NavigationService.GetNavigationService(this);
service.Navigate(new Uri("Window2.xaml", UriKind.RelativeOrAbsolute));
}
But this gives me error, saying the serviceis null, and the program crashed. I didn't figure out any way to solve this. Any suggestions? Thanks.
但这给了我错误，说它service为空，并且程序崩溃了。我没有想出任何方法来解决这个问题。有什么建议？谢谢。
回答by Nikita B
Try this:
尝试这个：
private void Button_Click_1(object sender, RoutedEventArgs e)
{
var window = new Window2();
window.ShowDialog();
}
You should also read the documentation on NavigationServiceclass and its methods to avoid further confusion on what this class does. Here is a good place to start: http://msdn.microsoft.com/en-us/library/system.windows.navigation.navigationservice.getnavigationservice%28v=vs.110%29.aspx
您还应该阅读有关NavigationService类及其方法的文档，以避免进一步混淆该类的作用。这是一个很好的起点：http: //msdn.microsoft.com/en-us/library/system.windows.navigation.navigationservice.getnavigationservice%28v=vs.110%29.aspx
回答by Eugene Podskal
NavigationService could not be used in classic WPF desktop application that use the Windowclass http://msdn.microsoft.com/en-us/library/ms750478(v=vs.110).aspx.
NavigationService 无法在使用Window类http://msdn.microsoft.com/en-us/library/ms750478(v=vs.110).aspx 的经典 WPF 桌面应用程序中使用。
You could navigate between Pageclass instances but not between Windowclass instances.
您可以在Page类实例之间导航，但不能在Window类实例之间导航。
You have to show and hide it manually using such techniques as shown in WPF. How hide/show main window from another window
您必须使用WPF 中所示的技术手动显示和隐藏它。如何从另一个窗口隐藏/显示主窗口
