Question

这些天我正在研究ModernUI，我在修改代码时遇到了一些问题。问题来自TabControl。来自MUI DOC的示例如下：

<Grid Style="{StaticResource ContentRoot}">
  <mui:ModernTab SelectedSource="/Content/LoremIpsum.xaml#1" Layout="List">
    <mui:ModernTab.Links>
        <mui:Link DisplayName="Lorem Ipsum 1" Source="/Content/LoremIpsum.xaml#1" />
        <mui:Link DisplayName="Lorem Ipsum 2" Source="/Content/LoremIpsum.xaml#2" />
    </mui:ModernTab.Links>
  </mui:ModernTab>
</Grid>

有人可以向我解释上面代码中#1的用法吗？

Answer 1

在这种情况下使用片段导航。这意味着当您在ViewModel中使用所选的源代码绑定时，您只需在#之后解析所有内容，即可找到该选项卡的 index 选择。您必须听取SourceChanged类型的事件，以了解用户选择了哪个标签或使用OnFragmentNavigation事件。

为此目的使用以下代码：

<强> namespace FirstFloor.ModernUI.Windows.Navigation

FragmentNavigationEventArgs.cs

/// <summary>
/// Provides data for fragment navigation events.
/// </summary>
public class FragmentNavigationEventArgs
    : EventArgs
{
    /// <summary>
    /// Gets the uniform resource identifier (URI) fragment.
    /// </summary>
    public string Fragment { get; internal set; }
}

<强> namespace FirstFloor.ModernUI.Windows

IContent.cs

/// <summary>
/// Defines the optional contract for content loaded in a ModernFrame.
/// </summary>
public interface IContent
{
    /// <summary>
    /// Called when navigation to a content fragment begins.
    /// </summary>
    /// <param name="e">An object that contains the navigation data.</param>
    void OnFragmentNavigation(FragmentNavigationEventArgs e);
    ...
}

<强> namespace FirstFloor.ModernUI.Windows.Navigation

NavigationHelper.cs

/// <summary>
/// Removes the fragment from specified uri and return it.
/// </summary>
/// <param name="uri">The uri</param>
/// <returns>The uri without the fragment, or the uri itself if no fragment is found</returns>
public static Uri RemoveFragment(Uri uri)
{
    string fragment;
    return RemoveFragment(uri, out fragment);
}

/// <summary>
/// Removes the fragment from specified uri and returns the uri without the fragment and the fragment itself.
/// </summary>
/// <param name="uri">The uri.</param>
/// <param name="fragment">The fragment, null if no fragment found</param>
/// <returns>The uri without the fragment, or the uri itself if no fragment is found</returns>
public static Uri RemoveFragment(Uri uri, out string fragment)
{
    fragment = null;

    if (uri != null) {
        var value = uri.OriginalString;

        var i = value.IndexOf('#');
        if (i != -1) {
            fragment = value.Substring(i + 1);
            uri = new Uri(value.Substring(0, i), uri.IsAbsoluteUri ? UriKind.Absolute : UriKind.Relative);
        }
    }

    return uri;
}

此外，您还可以在此问题中看到与IContent界面一起使用导航的示例：

Caliburn.Micro + MEF + Modern UI: IContent events

现代UI for WPF的'/Content/LoremIpsum.xaml#1'中的'＃1'是什么意思？

1 个答案: