现代ui wpf导航

Question

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);

我对url使用了以下值:"/ MainWindow.xaml","pack:// application:/MainWindow.xaml",

但抛出的异常"无法导航到pack:// application:/MainWindow.xaml,找不到ModernFrame目标''".

我错过了什么,以及如何正确导航？

Answer 1

使用NavigationService

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));

替代方法

使用uri

    string url = "/Page1.xaml";
    NavigationWindow nav = this.Parent as NavigationWindow;
    nav.Navigate(new System.Uri(url, UriKind.RelativeOrAbsolute));

使用对象

    NavigationWindow nav = this.Parent as NavigationWindow;
    nav.Navigate(new Page1());

这两种方法都将实现导航.上面的示例只有在您使用NavigationWindow的子节点时才有效,即在这种情况下为CheckLogin.xaml.或者,您可以通过一些辅助函数找到合适的父级.

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);
    }

使用LinkNavigator

您可能需要指定帧目标

string url = "/MainWindow.xaml";
BBCodeBlock bbBlock = new BBCodeBlock();
bbBlock.LinkNavigator.Navigate(new Uri(url, UriKind.Relative), this, NavigationHelper.FrameSelf);

可以为帧目标指定以下选项

    //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";