如何在 .NET MAUI 中的按钮上使用“Clicked”方法传递参数？

Question

我最近开始使用.Net MAUI。但是，我现在遇到了一个问题，在互联网上找不到任何帮助。我希望当我单击按钮时调用定义的单击函数。但是，我无法将参数传递给“Clicked”属性。我怎么做？

我尝试在不同在线论坛中的各种帖子的帮助下解决我的问题，但这些帖子都没有帮助，所以我正在创建自己的问题。

到目前为止我的代码：

XAML：

<Grid RowSpacing="50" Margin="50">
            <Grid.RowDefinitions>
                <RowDefinition />
                <RowDefinition />
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition />
                <ColumnDefinition />
                <ColumnDefinition />
            </Grid.ColumnDefinitions>
            <Border Stroke="Transparent"
                    StrokeThickness="3"
                    StrokeShape="RoundRectangle 30,30,30,30"
                    HorizontalOptions="Center"
                    BackgroundColor="White"
                    Grid.Row="0"
                    Grid.Column="0">
                <Border.GestureRecognizers>
                    <TapGestureRecognizer Tapped="onStudentSelected"/> <!-- Here i want to give a param -->
                </Border.GestureRecognizers>
                <VerticalStackLayout WidthRequest="300" HeightRequest="250">
                    <Border Stroke="#21B1FF"
                    StrokeThickness="3"
                    StrokeShape="RoundRectangle 15,15, 15, 15"
                    HorizontalOptions="Center"
                    BackgroundColor="White"
                    Margin="10">
                        <VerticalStackLayout WidthRequest="240">
                            <Label FontSize="25" VerticalTextAlignment="Center" HorizontalTextAlignment="Center" Text="Max Muster" Padding="10"/>
                        </VerticalStackLayout>
                    </Border>
                    <Border Stroke="#21B1FF"
                    StrokeThickness="3"
                    StrokeShape="RoundRectangle 15,15, 15, 15"
                    HorizontalOptions="Center"
                    BackgroundColor="White">
                        <VerticalStackLayout WidthRequest="240">
                            <Label Margin="5" VerticalTextAlignment="Center" HorizontalTextAlignment="Center" Text="Newest Grade: 5.8" Padding="10"/>
                            <Label Margin="5" VerticalTextAlignment="Center" HorizontalTextAlignment="Center" Text="Average: 4.5" Padding="10"/>
                            <Label Margin="5" VerticalTextAlignment="Center" HorizontalTextAlignment="Center" Text="Best Subject: Math" Padding="10"/>
                        </VerticalStackLayout>
                    </Border>
                </VerticalStackLayout>
            </Border>
        </Grid>

C＃：

private async void onStudentSelected(object sender, EventArgs e, int id)
    {
        await Shell.Current.GoToAsync("StudentDetail" + id);
    }

感谢您的帮助:)

Answer 1

你可以id从BindingContext

private async void onStudentSelected(object sender, EventArgs e)
    {
        // assuming your Model class is "Student"
        var border = (Border)sender;
        var item = (Student)border.BindingContext;
        var id = item.Id;

        await Shell.Current.GoToAsync("StudentDetail" + id);
    }

或者（与 MVVM 更一致）您可以使用Command 和 CommandParameter