在ItemClick()事件上獲取ListView專案的詳細資訊

我試過在這里和微軟檔案上搜索，但我找不到我的特定查詢的解決方案，因為主要是我看到了關于如何在 itemclick 上做事而不是檢索資料的帖子。

我目前正在使用一個 API，它發送一個 JSON 請求，我將其反序列化為 2 個部分類，在那里我使用 foreach 回圈向 ListView 添加新專案。您可以在此處查看課程：

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; }
    }

以及這里的請求、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);
        }
    }

Now I have set an gamehub_list_ItemClick method which runs when an item within the ListView is pressed. I would like to retrieve the GameID that's present in that item because I'll need that for another page which the user gets redirected to so that I know what game I must request data for. However, I've tried finding the index of the item and using the member names of the class to retrieve it but I can't seem to get it working.

The ItemClick method currently is:

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);
    }

When I tried to get the index of the item, it always returned as -1 and for the current clickedItemText it returns "Click Item text: ReviewR.GameHubs GameListObject".

My xaml with the 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>

uj5u.com熱心網友回復：

單擊專案文本：ReviewR.GameHubs GameListObject

問題是ClickedItem物件型別，如果你直接將它傳遞給字串，它會像你上面提到的那樣回傳文本。

對于這種情況，您需要 unbox ClickedItem。

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

標籤：c# listview uwp onitemclick

上一篇：命令列倒數計時器跳過一秒

下一篇：FlutterListView.buildersizedbox問題