棱镜按钮点击命令

Question

我尝试通过行为命令打开抽屉菜单（Syncfusion 控件）

Xaml

<Button x:Name="hamburgerButton" 
                                HeightRequest="50" WidthRequest="50" 
                                HorizontalOptions="Start" FontSize="20"
                                BackgroundColor="#1aa1d6" >
                            <Button.Behaviors>
                                <b:EventToCommandBehavior EventName="Clicked" 
                                      Command="{Binding HamburgerButton}" />
                            </Button.Behaviors>

虚拟机 cs

    public DelegateCommand HamburgerButton { get; private set; }   
 public QuickPartViewModel(INavigationService navigationService)
{ 
    HamburgerButton = new DelegateCommand(HamburgerButton_Clicked);
}
    public void HamburgerButton_Clicked(object sender, EventArgs e)
            {            
                navigationDrawer.ToggleDrawer();
            }

如果 HamburgerButton_Clicked(object sender, EventArgs e) with arguments 那么我有错误 -// Argumment: cannot convert from 'method group' to Action

如果我删除 Argumments 它不起作用

Answer 1

你想多了。只需将命令绑定到按钮即可。

在页面中：

<Button Command="{Binding HamburgerCommand}" />

在视图模型中：

public QuickPartViewModel()
{ 
    HamburgerCommand = new DelegateCommand(OnHamburger);
}

public DelegateCommand HamburgerCommand { get; }   

private void OnHamburger()
{            
     navigationDrawer.ToggleDrawer();
}

试试the docs...

棱镜按钮点击命令

Prism Button click command

prism

mvvm

xamarin.forms