System.InvalidCastException：'Specified cast is not valid.' 来自 Json API 的 Xamarin Spinner 数组

Question

我在填充微调器数组时遇到问题，它说转换无效。你能帮我解决这个问题吗？

private async void getplant()
    {
        string url = "http://localhost/VMSAPINEW2/MasterData/getplantlist";
        JsonValue json = await FetchWeatherAsync(url);
        string temp = "";
        ArrayList items = new ArrayList();

        for (int i = 0; i < json.Count; i++)
        {
            temp = json[i]["plantName"].ToString();
            items.Add(temp);
        }

        var adapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleSpinnerItem, (IList<string>)items);
        spinnerPlantNormal.Adapter = adapter;
    }

项的结果是

item[0] "\"SBM - BIKE\""
item[1] "\"SBM - ROD\""

和错误 System.InvalidCastException: 'Specified cast is not valid.' 用数组填充适配器时。

Answer 1

尝试改变

ArrayList items = new ArrayList();

至

List<string> items = new List<string>();

System.InvalidCastException：'Specified cast is not valid.' 来自 Json API 的 Xamarin Spinner 数组

System.InvalidCastException: 'Specified cast is not valid.' Xamarin Spinner Array from Json API

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