问题描述
我还尝试从数据库列表中生成 Shell Flyout 元素。但我不确定直接在 AppShell.xaml.cs
中实现是个好主意。是否有可能做同样的事情,但在
xml?
我在 Define FlyoutItem appearance 中看到了类似的东西。但我还是想不通。
另外,直接在 AppShell.xaml.cs
或 App.xaml.cs
中实现代码是个好主意吗?
LocationLevelviewmodel diudu = new LocationLevelviewmodel();
var lists = diudu.Items;
foreach (var list in lists)
{
ShellSection shell_section = new ShellSection();
shell_section.Title = list.LocationName;
shell_section.Icon = "icon_Feed.png";
shell_section.Items.Add(new ShellContent() { Content = new LocationLevelPage() });
this.Items.Add(shell_section);
}
解决方法
根据您提供的代码,您可以创建一个名为 AppShellCS
的新类,并在如下所示的新 AppShellCS.cs 文件中使用该代码。它运作良好。我做了一个简单的例子来测试而不是数据库。
public class AppShellCS : Shell
{
public AppShellCS()
{
LocationLevelViewModel diudu = new LocationLevelViewModel();
//var lists = diudu.Items;
var lists = new List<LocationLevelViewModel>
{
new LocationLevelViewModel() { LocationName="A"},new LocationLevelViewModel() { LocationName="B"},new LocationLevelViewModel() { LocationName="C"}
};
foreach (var list in lists)
{
ShellSection shell_section = new ShellSection();
shell_section.Title = list.LocationName;
shell_section.Icon = "tab_feed.png";
shell_section.Items.Add(new ShellContent() { Content = new LocationLevelPage() });
this.Items.Add(shell_section);
}
}
}
public class LocationLevelViewModel
{
public string LocationName { get; set; }
}
App.xaml.cs
public App()
{
InitializeComponent();
DependencyService.Register<MockDataStore>();
MainPage = new AppShellCS();
}
输出:
如果你想在现有的 Shell 项目中添加这个,你可以试试下面的代码。
AppShell.xaml.cs
public partial class AppShell : Xamarin.Forms.Shell
{
public AppShell()
{
InitializeComponent();
//Routing.RegisterRoute("step",typeof(Page2));
LocationLevelViewModel diudu = new LocationLevelViewModel();
//var lists = diudu.Items;
var lists = new List<LocationLevelViewModel>
{
new LocationLevelViewModel() { LocationName="A"},new LocationLevelViewModel() { LocationName="C"}
};
foreach (var list in lists)
{
ShellSection shell_section = new ShellSection();
shell_section.Title = list.LocationName;
shell_section.Icon = "tab_feed.png";
shell_section.Items.Add(new ShellContent() { Content = new LocationLevelPage() });
this.Items.Add(shell_section);
}
}
}
输出: