Siliverlight 3 用户控件之间的导航?

问题描述

我刚刚开始掌握来自 ASP.NET 和 Flex 的 silverlight 3.

Im just starting to get to grips with silverlight 3, coming from ASP.NET and Flex.

我已经按照这里的新导航教程阅读了身份验证和角色管理教程.

I have followed the new navigation tutorial here and read through the authentication and role management tutorials also.

所以，我有一个主页，它有一个框架、网格内部和几个视图.这些都是可导航的并且工作正常.我认为这个主页是我的小应用程序的母版页.

So, i have a main page, which has a frame, inside of the grid, and several views. These are all navigatable and working fine. I see this main page as kind of a master page to my little application i have i mind.

所以知道我想要一个 login.xaml 用户控件.这将处理所有登录，一旦通过身份验证，我想导航到 MainPage，并使用它的框架从那里开始.

So know I want to have a login.xaml UserControl. This will handle all login and once authenticated I want to navigate to the MainPage, and the use its frame to go from there.

我不只是想简单地在我的框架中使用登录作为一个单独的页面，因为我希望登录使用与应用程序的其余部分不同的网格，并且也是独立的.

I dont just want to simply use login as a seprate page within my frame as I want the login to use a different grid to the rest of the app, and also to be separate.

那么我将如何从一个用户控件(登录)导航到另一个(主)?

So how would I navigate from one user control (Login) to another (Main) ?

我试过了

 private void btnLogin_Click(object sender, RoutedEventArgs e)
    {
        //TO - DO: All the auth work, just want navigation sorted first

        this.Visibility = Visibility.Collapsed;
        App.Current.RootVisual = new MainPage(); 
    }

没有运气.我也尝试过初始化一个新的 main 并设置它的可见性，但这当然不起作用.

With no luck. Ive also tried just init'n a new main and setting its Visibility but this of course doesnt work.

我是否以正确的方式处理这个问题?

Am I even approaching this in the correct way?

非常感谢.

编辑 - 进一步挖掘之后，这个 看起来像是一种可以做我所追求的方法，但它确实感觉有点骇人听闻！这是 silverlight 3 的建议方式吗?再次感谢

Edit - Ok after digging a little further, this looks like an approach that will do what im after, but it does feel a little hackish! Is this the suggested way for siverlight 3? Thanks Again

推荐答案

我通常做的是创建一个 System.Windows.Controls.Navigation 类型的MainPage.xaml".这被分配给我的应用程序的 RootVisual 属性；它几乎是空的，除了一个导航框架:

What I've usually done is to create a "MainPage.xaml" which is of type System.Windows.Controls.Navigation. That gets assigned to the RootVisual property of my application; it's pretty much empty, except for a navigation frame:

<navigation:Page 
x:Class="Client.MainPage" 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
mc:Ignorable="d" 
d:DesignWidth="400" 
d:DesignHeight="400" MinWidth="700" MinHeight="480"
HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
Title="Main SlideLinc Page">
<Grid x:Name="LayoutRoot">
    <navigation:Frame x:Name="rootFrame" />
</Grid>
</navigation:Page>

然后我使用rootFrame"导航框架来处理我所有的导航需求，例如，使用来自静态 NavigationManager 类的这些方法:

Then I use the "rootFrame" navigation frame to handle all my navigation needs, e.g., with these methods from a static NavigationManager class:

    public static void Navigate(string url, Action<Exception, UIElement> callback)
    {
        Navigate(new Uri(url, UriKind.RelativeOrAbsolute), callback);
    }

    public static void Navigate(Uri uri, Action<Exception, UIElement> callback)
    {
        if (rootFrame == null)
        {
            Logger.LogMessage("Can't use navigation, because rootFrame is null");
            ErrorMessageBox.Show(ClientStrings.NavigationFailed);
        }
        else
        {
            NavigatedEventHandler successHandler = null;
            NavigationFailedEventHandler failureHandler = null;
            successHandler = (s, e) =>
                 {
                     rootFrame.Navigated -= successHandler;
                     rootFrame.NavigationFailed -= failureHandler;
                     if (callback != null)
                     {
                         callback(null, e.Content as UIElement);
                     }
                 };
            failureHandler = (s, e) =>
                {
                    rootFrame.Navigated -= successHandler;
                    rootFrame.NavigationFailed -= failureHandler;
                    if (callback != null)
                    {
                        callback(e.Exception, null);
                    }
                };
            rootFrame.Navigated += successHandler;
            rootFrame.NavigationFailed += failureHandler;
            rootFrame.Navigate(uri);
        }
    }

所以在你的情况下，你可以像这样使用它:

So in your case, you might use it like:

NavigationManager.Navigate(new Uri("/Login.xaml", UriKind.Relative), null);

或者:

NavigationManager.Navigate(new Uri("/Home.xaml", UriKind.Relative), (error, element) => InitializeElement(element));

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