public Html Dropdown <T>(ObservableArray <T> list, Observable <T> selectedItem, string displayField, string valueField)
{
if (Context.NodeName.ToLowerCase() != "select")
{
Select.Render();
}
var select = Context as HTMLSelectElement;
ForEach(list, (T model, int index) => {
var text = model[displayField] as string;
var value = model[valueField] as string;
Option.Text(text).Value(value).End.Render();
});
select.SelectedIndex = GetSelectedIndex(list.Data.ToList(), selectedItem.Data, valueField);
list.Subscribe(realList => {
select.SelectedIndex = GetSelectedIndex(realList.Array.ToList(), selectedItem.Data, valueField);
});
selectedItem.BindingNodes.Add(select);
Event(EventType.Change, () => {
var selectedObj = list.Data[select.SelectedIndex];
selectedItem.Data = selectedObj;
});
// Subscribe change from selectedItem, to update selected index
selectedItem.Subscribe(val => {
select.SelectedIndex = GetSelectedIndex(list.Data.ToList(), val.NewData, valueField);
});
return(this);
}
public Html ForEach <T>(ObservableArray <T> observableArray, Action <T, int> renderer)
{
if (observableArray == null)
{
throw new ArgumentNullException(nameof(observableArray));
}
var element = Context;
var array = observableArray.Data as Array;
var length = array.Length;
var index = -1;
while (++index < length)
{
Context = element;
renderer.Call(element, array[index] ?? index, index);
}
observableArray.Subscribe((ObservableArrayArgs <T> e) =>
{
e.Element = element;
e.Renderer = renderer;
e.Action = e.Action ?? ObservableAction.Render;
Update(e);
});
return(this);
}
