Xamarin Listview获取所选项目

Question

Cannot figure out a proper way get an item from ListView.

My XAML bindings:

            <ListView x:Name="MyListView" ItemTapped="MyListView_ItemTapped" HasUnevenRows="True">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <ViewCell>
                        <StackLayout>

                            <Label Text="{Binding Name}"></Label>
                            <Label Text="{Binding Email}"></Label>
                            <Image Source="{Binding PhotoUrl}" WidthRequest="20" HeightRequest="20"></Image>
                        </StackLayout>
                    </ViewCell>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>

All the data gets displayed and works fine. Class is called Forums:

    [JsonProperty("results")]
    public List<Result> Results { get; set; }

    public class Result
    {
        [JsonProperty("name")]
        public string Name { get; set; }
        [JsonProperty("email")]
        public string Email { get; set; }
        [JsonProperty("photoUrl")]
        public string PhotoUrl { get; set; }
    }

I have made MyListView_ItemTapped Function and for now, I'm trying to display its name when the item is tapped on, but not sure what is a proper way to do it. And I always think that I'm just bodging some random things together until I get something.

        private void MyListView_ItemTapped(object sender, ItemTappedEventArgs e)
    {

        var index = forums.Results.IndexOf(e.Item as Forums.Result);
        DisplayAlert("Alert", forums.Results[index].Name, "OK");

    }

So if anyone could point me to the better direction or even give few better examples or just explain how should it be done.

Answer 1

just cast e.Item to the correct type

var item = e.Item as Forums.Result;

// then use item.Name, etc...

Answer 2

You can cast to the correct Class

private void MyListView_ItemTapped(object sender, ItemTappedEventArgs e)
    {

        var index = forums.Results.IndexOf(e.Item as Forums.Result);
        var selectedItem = (Forums.Result)e.Item;
        if(selectedItem != null)
        {
           DisplayAlert("Alert", selected|Item.Name, "OK");
        }

    }

Oh and if you want to remove the selecteditem effect just

if (sender is ListView lv) lv.SelectedItem = null;

Answer 3

You can also use selected item property <ListView **SelectedItem="{Binding Result, Mode=TwoWay}">**

code behind:

`private Result _result;

public Result Result
{
    get { return _deviceSession; }
    set
    {
        SetProperty(ref _deviceSession, value);
    }
}`

From this class object you can able to get all data