[UWP] [C＃]无法在ListView上捕获事件SelectedItem到ViewModel？ [英] [UWP][C#] Can't catch a event SelectedItem to ViewModel on ListView?

问题描述

在MasterPage中，有2个Frame。 HomePage位于第一帧 - >

In MasterPage, there are 2 Frame. HomePage is at the first Frame ->

     <Page.DataContext>
        <viewmodel:HomeVM/>
    </Page.DataContext>
<ListView x:Name="lstHome" SelectedItem="{Binding lstHome_ItemClick}"
                      Margin="10"
                      ItemsSource="{Binding statusList}">

在HomeVM中：

/// <summary>
    /// ItemClick of ListView
    /// </summary>
    private Status _lstHome_ItemClick;
    public Status lstHome_ItemClick
    {
        get
        {
            return _lstHome_ItemClick;
        }
        set
        {
            if(_lstHome_ItemClick==value)
            {
                return;
            }
            _lstHome_ItemClick = value;
            //Excute the below code when the selection of listview has changed
            ItemClick(_lstHome_ItemClick);

            PropertyChanged?.Invoke(this,new PropertyChangedEventArgs("lstHome_ItemClick"));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

当我点击Listview上的项目时 - >不要调用lstHome_ItemClick。为什么？

When I click items on Listview-> don't call lstHome_ItemClick. Why?

推荐答案

您好，

您只需要将您的绑定更改为牵引方式 

You only need to change your Binding to the tow way 

SelectedItem="{Binding lstHome_ItemClick,Mode=TwoWay}" 

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