bind properties to a listview - xaml

Question

I have a Weather VM, that get my city and country code perfectly, but I am trying to bind the rest of my data to XAML.
All my data is store in the array, and for some reason, when I loop, the variable i, does not increment and the app crash.
I also have the problem of the icon, I have a list, that is the itemsource of my Listview, but the Icon is on another array
I tried to loop, and assign each variable, and the loop always crash
var splitedData = cityData.Split(",");
var city = splitedData[0];
var conutryCode = splitedData[1];
var data = await WeatherAPI.GetWeatherDataAsync(city, conutryCode);
if (data != null) {
for (int i = 0; i < data.list.Count; i++) {
rootObject.list[i].dt_txt = data.list[i].dt_txt;
rootObject.list[i].main.temp_max = data.list[i].main.temp_max;
rootObject.list[i].main.temp_min = data.list[i].main.temp_min;
rootObject.list[i].weather[i].icon
}
}
}
xaml listView
Margin="20" ItemsSource="{Binding rootObject.list}">
<ListView.ItemTemplate>
<DataTemplate>
<RelativePanel>
<TextBlock x:Name="dateTB"
Text="{Binding dt_txt}"
RelativePanel.RightOf="iconTB"
RelativePanel.AlignTopWith="iconTB" />
<TextBlock x:Name="highTB"
Text="{Binding main.temp_max}"
RelativePanel.RightOf="iconTB"
RelativePanel.Below="dateTB"
FontSize="10" />
<TextBlock x:Name="lowTB"
RelativePanel.RightOf="highTB"
RelativePanel.Below="dateTB"
FontSize="10"
Text="{Binding main.temp_min}"
Margin="10,0,0,0" />
<Image x:Name="iconTB"
Source="{}"
Height="30"
Width="30"
/>
</RelativePanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
I expect the Dates to appear, the High to appear and the low to appear.
Also I have don't have a clue of how to bind the icon, becouse the icon is in Weather, and not the RootObject list, that is the itemsource of my list

Answer 1

I tried your code in my side and find something might be the reason. The problem might be that you didn't create instances for main object or weather list or day list. So you are assigning values to null and then it gives error.
I changed it a little bit, you can try in your side.(I still can't use MapLocator.GetCityData(); so I haven't tried this with real data.)
public class RootObject : Notify
{
private List<Day> _list;
public List<Day> list
{
get { return _list; }
set
{
if (value != _list)
{
_list = value;
onPropertyChanged("list");
}
}
}
public RootObject()
{
//I added five objects for test. In real scenario, the count depends on the data number you get
list = new List<Day>();
list.Add(new Day());
list.Add(new Day());
list.Add(new Day());
list.Add(new Day());
list.Add(new Day());
}
}
public class Day : Notify
{
private Main _main;
public Main main
{
get { return _main; }
set
{
if (value != _main)
{
_main = value;
onPropertyChanged("main");
}
}
}
private List<Weather> _weather;
public List<Weather> weather
{
get { return _weather; }
set
{
if (value != _weather)
{
_weather = value;
onPropertyChanged("weather");
}
}
}
private string _dt_txt;
public string dt_txt
{
get { return _dt_txt; }
set
{
if (value != _dt_txt)
{
_dt_txt = value;
onPropertyChanged("dt_txt");
}
}
}
public Day()
{
main = new Main();
//I added five objects for test. In real scenario, the count depends on the data number you get
weather = new List<Weather>();
weather.Add(new Weather());
weather.Add(new Weather());
weather.Add(new Weather());
weather.Add(new Weather());
weather.Add(new Weather());
}
}
For local test, I just added 5 objects. In your real scenario, you need to check the count of data from bingmap.