尝试做一个收入/月计算器。C#部分已经完成，现在我必须做一个集合视图，根据月数自动更新（1个月-1行/ 5个月-5行）。
当我在条目中输入值，并按下Calculate按钮时，什么也没有发生。也没有错误。

集合视图代码（XAML）

<CollectionView ItemsSource="{Binding MonthlyIncomeCalculus}">
            <CollectionView.ItemTemplate>
                <DataTemplate>
                    <Grid Padding="10">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto" />
                            <RowDefinition Height="Auto" />
                        </Grid.RowDefinitions>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="Auto" />
                        </Grid.ColumnDefinitions>
                        <Label Grid.Column="1"
                       Text="Month"
                       FontAttributes="Bold" />
                        <Label Grid.Column="2"
                       Text="Income with Rate"
                       FontAttributes="Bold" />
                        <Label Grid.Row="1"
                       Text="{Binding Month}"
                       FontAttributes="Bold" />
                        <Label Grid.Column="2"
                       Text="{Binding Income}"
                       FontAttributes="Bold" />
                    </Grid>
                </DataTemplate>
            </CollectionView.ItemTemplate>
        </CollectionView>

可观察集合+“计算器”（C#）

public partial class HomePage
{
    public HomePage()
    {
        InitializeComponent();
        _ = new Entry { Keyboard = Keyboard.Numeric };

    }
    public class MonthlyIncome
    {
        public int Month { get; set; }
        public double Income { get; set; }
    }
    public ObservableCollection<MonthlyIncome> MonthlyIncomeCalculus { get; set; } = new();
    private void Calculate(object sender, EventArgs e)
    {
        BindingContext = MonthlyIncomeCalculus;
        MonthlyIncomeCalculus.Clear();

        MonthlyIncome monthi;
        int Months = int.Parse(MonthInput.Text);
        int Income = int.Parse(IncomeInput.Text);

        for (int i = 0; i < Months; i++)
        {
            monthi = new MonthlyIncome();
            monthi.Month = i + 1;
            monthi.Income = (Income * Months) * 1.10;
            MonthlyIncomeCalculus.Add(monthi);
        }

    }

}