在 ItemClick() 事件中获取 ListView 项目的详细信息

Get ListView item's details on ItemClick() event

我试过在这里和微软文档上搜索,但我找不到针对我的特定查询的解决方案,因为我主要看到了关于如何在 itemclick 上执行操作而不是检索数据的帖子。

我目前正在使用 API,它发送一个 JSON 请求,我将其反序列化为 2 个部分 classes,我在其中使用 foreach 循环将新项目添加到列表视图。您可以在此处查看 classes:

public partial class GameListObject
    {
        [JsonPropertyName("id")]
        public long GameID { get; set; }

        [JsonPropertyName("name")]
        public string GameName { get; set; }

        [JsonPropertyName("release_dates")]
        public ObservableCollection<ReleaseDate> ReleaseDates { get; set; }
    }

    public partial class ReleaseDate
    {
        [JsonPropertyName("id")]
        public long Id { get; set; }

        [JsonPropertyName("human")]
        public string Human { get; set; }
    }

以及这里的请求、反序列化和添加到 ListView:

//On search box content change
    private async void gamehub_search_TextChanged(object sender, TextChangedEventArgs e)
    {
        var SearchQuery = gamehub_search.Text;

        try
        {
            // Construct the HttpClient and Uri
            HttpClient httpClient = new HttpClient();
            Uri uri = new Uri("https://api.igdb.com/v4/games");

            httpClient.DefaultRequestHeaders.Add("Client-ID", App.GlobalClientidIGDB);
            httpClient.DefaultRequestHeaders.Add("Authorization", "Bearer " + App.GlobalAccessIGDB);
            //Debug.WriteLine("Request Headers: ");

            // Construct the JSON to post
            HttpStringContent content = new HttpStringContent($"search \"{SearchQuery}\"; fields name,release_dates.human;");
            Debug.WriteLine("Request Contents: " + content);

            // Post the JSON and wait for a response
            HttpResponseMessage httpResponseMessage = await httpClient.PostAsync(
                uri,
                content);

            // Make sure the post succeeded, and write out the response
            httpResponseMessage.EnsureSuccessStatusCode();
            var httpResponseBody = await httpResponseMessage.Content.ReadAsStringAsync();
            Debug.WriteLine("Request Response: " + httpResponseBody);

            //Deserialise the return output into game id, game name and release date
            List<GameListObject> gamelistobjects = JsonSerializer.Deserialize<List<GameListObject>>(httpResponseBody);

            ObservableCollection<GameListObject> dataList = new ObservableCollection<GameListObject>(gamelistobjects);
            ObservableCollection<GameListObject> GameList = new ObservableCollection<GameListObject>();

            foreach (var item in dataList)
            {
                Debug.WriteLine($"id: {item.GameID}");
                Debug.WriteLine($"name: {item.GameName}");

                GameListObject add = new GameListObject() { GameID = item.GameID, GameName = item.GameName };
                GameList.Add(add);

                if (item.ReleaseDates != null)
                {
                    foreach (var date in item.ReleaseDates)
                    {
                        Debug.WriteLine($"releaseDate: {date.Human}");
                    }
                }
            }
            gamehub_list.ItemsSource = GameList;
        }
        catch (Exception ex)
        {
            Debug.WriteLine(ex);
        }
    }

现在我设置了一个 gamehub_list_ItemClick 方法,该方法在按下 ListView 中的项目时运行。 我想检索该项目中存在的 GameID,因为我需要将其用于用户重定向到的另一个页面,以便我知道我必须为哪个游戏请求数据。但是,我已经尝试找到该项目的索引并使用 class 的成员名称来检索它,但我似乎无法让它工作。

ItemClick 方法目前是:

private void gamehub_list_ItemClick(object sender, ItemClickEventArgs e) //When an item in List View is pressed
    {
        string clickedItemText = e.ClickedItem.ToString();

        Debug.WriteLine("Click Item text: " + clickedItemText);
    }

当我尝试获取项目的索引时,它总是返回 -1,对于当前的 clickedItemText,它 returns“点击项目文本:ReviewR.GameHubs+GameListObject”。

我的 xaml 与 ListView:

<ListView x:Name="gamehub_list" SelectionMode="None" IsItemClickEnabled="True" ItemClick="gamehub_list_ItemClick" Margin="30,140,44,30" BorderThickness="5" BorderBrush="Black" Background="Gray" RequestedTheme="Dark" Visibility="Collapsed">
                <ListView.ItemTemplate>
                    <DataTemplate>
                        <Grid>
                            <StackPanel>
                                <TextBlock Text="{Binding GameID}"></TextBlock>
                                <TextBlock Text="{Binding GameName}"></TextBlock>
                            </StackPanel>
                        </Grid>
                    </DataTemplate>
                </ListView.ItemTemplate>
            </ListView>

Click Item text: ReviewR.GameHubs+GameListObject

问题是ClickedItem是对象类型,如果你直接传给string,它会return像你上面提到的文本。

对于这种情况,您需要拆箱 ClickedItem

var clickedItem = e.ClickedItem as GameListObject
Debug.WriteLine("Click Item text: " + clickedItem.GameID );