优化更新代码，添加界面功能并整合

WPFluent/Services/NavigationService.cs

@@ -0,0 +1,93 @@
+
+
+
+using WPFluent.Abstractions;
+using WPFluent.Controls;
+
+namespace WPFluent;
+
+/// <summary>
+/// A service that provides methods related to navigation.
+/// </summary>
+public partial class NavigationService(INavigationViewPageProvider pageProvider) : INavigationService
+{
+    protected void ThrowIfNavigationControlIsNull()
+    {
+        if(NavigationControl is null)
+        {
+            throw new ArgumentNullException(nameof(NavigationControl));
+        }
+    }
+
+    /// <summary>
+    /// Gets or sets the control representing navigation.
+    /// </summary>
+    protected INavigationView? NavigationControl { get; set; }
+
+    /// <inheritdoc/>
+    public INavigationView GetNavigationControl()
+    { return NavigationControl ?? throw new ArgumentNullException(nameof(NavigationControl)); }
+
+    /// <inheritdoc/>
+    public bool GoBack()
+    {
+        ThrowIfNavigationControlIsNull();
+
+        return NavigationControl!.GoBack();
+    }
+
+    /// <inheritdoc/>
+    public bool Navigate(Type pageType)
+    {
+        ThrowIfNavigationControlIsNull();
+
+        return NavigationControl!.Navigate(pageType);
+    }
+
+    /// <inheritdoc/>
+    public bool Navigate(string pageTag)
+    {
+        ThrowIfNavigationControlIsNull();
+
+        return NavigationControl!.Navigate(pageTag);
+    }
+
+    /// <inheritdoc/>
+    public bool Navigate(Type pageType, object? dataContext)
+    {
+        ThrowIfNavigationControlIsNull();
+
+        return NavigationControl!.Navigate(pageType, dataContext);
+    }
+
+    /// <inheritdoc/>
+    public bool Navigate(string pageTag, object? dataContext)
+    {
+        ThrowIfNavigationControlIsNull();
+
+        return NavigationControl!.Navigate(pageTag, dataContext);
+    }
+
+    /// <inheritdoc/>
+    public bool NavigateWithHierarchy(Type pageType)
+    {
+        ThrowIfNavigationControlIsNull();
+
+        return NavigationControl!.NavigateWithHierarchy(pageType);
+    }
+
+    /// <inheritdoc/>
+    public bool NavigateWithHierarchy(Type pageType, object? dataContext)
+    {
+        ThrowIfNavigationControlIsNull();
+
+        return NavigationControl!.NavigateWithHierarchy(pageType, dataContext);
+    }
+
+    /// <inheritdoc/>
+    public void SetNavigationControl(INavigationView navigation)
+    {
+        NavigationControl = navigation;
+        NavigationControl.SetPageProviderService(pageProvider);
+    }
+}