Question

我有一个问题，我试图将我的项目添加到我的observable集合，但我收到此错误：

参数1：无法转换为System.Collections.Generic.List＆＃39;到GameFinder.GetGamesList＆＃39;

代码：

private void RequestCompleted(object sender, DownloadStringCompletedEventArgs e)
    {

        if (e.Error == null)
        {
            var feedXml = XDocument.Parse(e.Result);

            var gameData = feedXml.Root.Elements("Game").Select(x => new GetGamesList
            {
                ID = (int)x.Element("id"),
                GameTitle = (string)x.Element("GameTitle"),
                ReleaseDate = (string)x.Element("ReleaseDate"),
                Platform = (string)x.Element("Platform")
            })
              .ToList();
            Items.Add(gameData); // THE ERROR IS HERE - Items is the observablecollection
        }
    }

private ObservableCollection<GetGamesList> _Items = new ObservableCollection<GetGamesList>();
    public ObservableCollection<GetGamesList> Items
    {
        get
        {
            return this._Items;
        }
    }

public class GetGamesList
{
    public int ID { get; set; }
    public string GameTitle { get; set; }
    public string ReleaseDate { get; set; }
    public string Platform { get; set; }
}

Answer 1

尝试

foreach (var item in gameData) Items.Add(item)

gameData是List<GetGamesList>，因此您需要将gameData中的每个项目添加到Items列表中，因为ObservableCollection没有AddRange你需要在循环中手动完成它

Answer 2

您对cannot convert from 'System.Collections.Generic.List' to 'GameFinder.GetGamesList'的理解究竟是什么？ Add方法接受单个元素，而您传入元素列表。您可以使用new ObservableCollection<GetGamesList>(gameData)。并删除Linq查询末尾的ToList语句。

C＃无法将项目添加到可观察集合中

2 个答案: