如何从 ViewModel 到 View 获取集合? [英] How to get a collection from the ViewModel to the View?

问题描述

我有一个 ObservableCollection 对象存储在 ViewModel 中，并且对于每个对象，我想将 BoxView 添加到我的 >查看.我计划在后面的 XAML 代码中构建 BoxViews 以使其与业务逻辑分离.我的问题是我无法找出从 View 访问 ViewModel 中的集合的正确方法.有没有办法将 View 中的集合变量绑定到 ViewModel 中的一个，或者也许有人知道实现这样的东西的更好方法?

I have an ObservableCollection of objects that gets stored in the ViewModel and for each object I want to add a BoxView to my View. I plan to build the BoxViews in the XAML code behind to keep it separate from the business logic. My problem is that I cannot figure out the correct way to access the collection in the ViewModel from the View. Is there a way to bind a collection variable in the View to the one in the ViewModel, or maybe someone knows a better way to implement something like this?

推荐答案

public partial class MyPage
{
    private MyViewModel _viewModel;
    public MyPage()
    {
        InitializeComponent();
    }

    protected override void OnBindingContextChanged()
    {
        base.OnBindingContextChanged();
        _viewModel = BindingContext as MyViewModel;
        var collection = _viewModel.MyCollection;
    }

}

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