Xamarin.Forms の ListView をコードビハインドで書く場合の例

CodeBehindPage.cs

Public partial class CodeBehindPage : ContentPage
{
    ObservableCollection<Item> Items = new ObservableCollection<Item>();

    public CodeBehindRamenPage()
    {
        InitializeComponent();

        // Items初期化
        this.Items.Clear();
        // Binding対象にItemsを指定
        listView.BindingContext = this.Items;
    }

    void AddButtonClick(object sender, EventArgs s)
    {
        this.Items.Add(new Item("MainText", "SubText", "SampleImage.png"));
    }

    void DeleteButtonClick(object sender, EventArgs s)
    {
        if (this.Items.Count > 0)
        {
            this.Items.Remove(this.Items[this.Items.Count - 1]);
        }
    }
}