.net 应用主题应用
[删除(380066935@qq.com或微信通知)]
internal class ThemeService
{
/// <summary>
/// 获取当前系统主题
/// </summary>
/// <returns></returns>
public AppTheme GetAppTheme()
{
return Application.Current!.RequestedTheme;
}
/// <summary>
/// 系统主题切换
/// </summary>
/// <param name="handler"></param>
public void ThemeChanged(EventHandler<AppThemeChangedEventArgs> handler)
{
Application.Current!.RequestedThemeChanged += handler;
}
}
builder.Services.AddSingleton<ThemeService>();
public bool IsDark { get; set; } = true;
[Inject]
internal ThemeService ThemeService { get; set; }
/// <summary>
/// 处理系统主题切换
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void HandlerAppThemeChanged(object sender, AppThemeChangedEventArgs e)
{
IsDark = e.RequestedTheme == AppTheme.Dark;
InvokeAsync(StateHasChanged);
}
protected override async Task OnAfterRenderAsync(bool firstRender)
{
if (firstRender)
{
// 获取系统主题
var appTheme = ThemeService.GetAppTheme();
// 根据系统主题是否为Dark,为IsDark属性赋值
IsDark = appTheme == AppTheme.Dark;
ThemeService.ThemeChanged(HandlerAppThemeChanged);
StateHasChanged();
}
await base.OnAfterRenderAsync(firstRender);
}