xamarin - 来自 View 模型的选择器项源绑定(bind)

Question

我正在尝试从 View 模型中的模型绑定(bind)选择器的值，在那里我得到模型的路径而不是值。

<Picker x:Name="LocationPicker"
    Title="Location" HeightRequest="40"
    HorizontalOptions="FillAndExpand"
    VerticalOptions="FillAndExpand"
    SelectedItem="{Binding Location}"
    ItemsSource="{Binding MaintainRoomTypes}"/>

这是我的 View 模型代码:

if (jobDetailsForFitter != null)
{
    WindowDetails = new WindowDetailsModel
    {
        Windows = jobDetailsForFitter.Windows,
        Locations = jobDetailsForFitter.Locations,
        RoomTypes = jobDetailsForFitter.RoomTypes,
        AddFiles = jobDetailsForFitter.AddFiles
    };

    Locations = jobDetailsForFitter.Locations;

    MaintainRoomTypes = jobDetailsForFitter.RoomTypes;

    await FitterService.Instance.LoadJobDetailsToLocalStore(jobDetailsForFitter, SelectedJob?.Id ?? 0);
}

如何绑定(bind)itemsource获取列表。

public List<Room> Locations { get; set; }
public List<RoomTypeModel> RoomTypes { get; set; }

Answer 1

您必须为 Picker 定义 ItemDisplayBinding 属性。

例如:

public class Room
{
public string RoomNumber { private set; get; }
public string RoomName { private set; get; }
}

并且您想在Picker中显示RoomName

<Picker ItemsSource="{Binding Room}" ItemDisplayBinding="{Binding RoomName}"/>

希望这能解决您的问题。