现代 ui wpf 导航
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modern ui wpf navigation
提问by user3222589
I'm using modern ui wpf and trying to navigate from CheckLogin.xaml page to MainWindow.xaml page (they are in solution root directory). From inside CheckLogin.xaml I wrote this:
我正在使用现代 ui wpf 并尝试从 CheckLogin.xaml 页面导航到 MainWindow.xaml 页面（它们位于解决方案根目录中）。从 CheckLogin.xaml 里面我写了这个：
BBCodeBlock bbBlock = new BBCodeBlock();
bbBlock.LinkNavigator.Navigate(new Uri(url, UriKind.Relative), this);
I used the following values for url: "/MainWindow.xaml", "pack://application:/MainWindow.xaml",
我对 url 使用了以下值：“/MainWindow.xaml”、“pack://application:/MainWindow.xaml”、
but an exception thrown "Unable to navigate to pack://application:/MainWindow.xaml, could not find a ModernFrame target ''".
但抛出异常“无法导航到 pack://application:/MainWindow.xaml，找不到 ModernFrame 目标 ''”。
what I'm missing, and how to navigate correctly?
我缺少什么，以及如何正确导航？
回答by pushpraj
Using NavigationService
使用导航服务
To use navigation service to navigate between pages
使用导航服务在页面之间导航
string url = "/Page1.xaml";
NavigationService nav = NavigationService.GetNavigationService(this);
nav.Navigate(new System.Uri(url, UriKind.RelativeOrAbsolute));
Alternative approach
替代方法
Using uri
使用 uri
string url = "/Page1.xaml";
NavigationWindow nav = this.Parent as NavigationWindow;
nav.Navigate(new System.Uri(url, UriKind.RelativeOrAbsolute));
Using object
使用对象
NavigationWindow nav = this.Parent as NavigationWindow;
nav.Navigate(new Page1());
these both approach will achieve the navigation too. above sample will only work when you are using them from the child of NavigationWindow i.e. CheckLogin.xaml in this case. alternatively you may find the appropriate parent by some helper functions.
这两种方法也将实现导航。上面的示例仅在您从 NavigationWindow 的子级（即 CheckLogin.xaml 在这种情况下）使用它们时才有效。或者，您可以通过一些辅助函数找到合适的父级。
Eg.
例如。
NavigationWindow nav = FindAncestor<NavigationWindow>(this);
public static T FindAncestor<T>(DependencyObject dependencyObject) where T : DependencyObject
{
var parent = VisualTreeHelper.GetParent(dependencyObject);
if (parent == null) return null;
var parentT = parent as T;
return parentT ?? FindAncestor<T>(parent);
}
Using LinkNavigator
使用链接导航器
you may need to specify the frame target
您可能需要指定框架目标
string url = "/MainWindow.xaml";
BBCodeBlock bbBlock = new BBCodeBlock();
bbBlock.LinkNavigator.Navigate(new Uri(url, UriKind.Relative), this, NavigationHelper.FrameSelf);
following options can be specified for frame target
可以为框架目标指定以下选项
//Identifies the current frame.
public const string FrameSelf = "_self";
//Identifies the top frame.
public const string FrameTop = "_top";
//Identifies the parent of the current frame.
public const string FrameParent = "_parent";
