Xamarin Forms：分组 ObservableCollection

Question

我有一个 ListView 绑定到 ObservableCollection<Request>。这里是 Request class:

public class Request
{
    public int Id { get; set; }
    public string RequestName { get; set; }
    public string Provider { get; set; }
    public int Done { get; set; }
}

我在 Done 中只有 2 个可能的值：0 或 1。将 Done 设置为 0 的 Request 分配给一组，其他分配给另一组。这怎么可能？

Answer 1

您可以按照以下方式对其进行分组。您可能需要进一步增强它以使其更加用户友好。

分组属性

private ObservableCollection<Grouping<String, Request>> _groupedList = null;
public ObservableCollection<Grouping<String, Request>> GroupedList {
    get {
        return _groupedList;
    }
    set {
        _groupedList = value;
        RaisePropertyChanged(() => GroupedList);
    }
}

正在创建列表

var list = new List<Request>();

var grouped = from Model in list
                         group Model by Model.Done into Group
                         select new Grouping<string, Request>(Group.Key, Group);

GroupedList = new ObservableCollection<Grouping<string, TModel>>(grouped);

ListViewXaml

<ListView IsGroupingEnabled="true" HasUnevenRows="true">
    <ListView.GroupHeaderTemplate>
        <DataTemplate>
            <ViewCell>                
                <Label Text="{Binding Key}" VerticalOptions="Center"/>
            </ViewCell>
        </DataTemplate>
    </ListView.GroupHeaderTemplate>
    <ListView.ItemTemplate>
        <DataTemplate>
            <ViewCell>
                <ViewCell.View>
                <ContentView Padding="10">
                    <Label Text={Binding RequestName}" />
                </ContentView>
                </ViewCell.View>
            </ViewCell>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

Xamarin Forms：分组 ObservableCollection

Xamarin Forms: Grouping ObservableCollection

c#

binding

listview

xamarin

xamarin.forms