在Windows 8 Metro App中对GridView进行分组

Can someone give me some hints how to accomplish the grouping within a GridView for Metro Apps as shown in the Screenshot below.

有人可以给我一些提示如何在GridView for Metro Apps中完成分组，如下面的屏幕截图所示。

This Screenshot is from the Developer Resources for Windows Metro Apps, but unfortunately there is no description how to accomplish it.

此屏幕截图来自Windows资源管理器的开发人员资源，但遗憾的是没有说明如何完成它。

I have the following code snippet:

我有以下代码片段：

Xaml:

XAML：

    ...

    <Page.Resources>
        <CollectionViewSource x:Name="cvs" IsSourceGrouped="true"/>
    </Page.Resources>

    <Grid Background="{StaticResource DefaultBackground}">

        <GridView x:Name="DefaultGridView" ItemsSource="{Binding Source={StaticResource cvs}}">
            <GridView.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <Rectangle Fill="{Binding}" Width="100" Height="100" Margin="0 0 5 0"/>
                    </StackPanel>
                </DataTemplate>
            </GridView.ItemTemplate>

            <GridView.GroupStyle>
                <GroupStyle>

                    <GroupStyle.HeaderTemplate>
                        <DataTemplate>
                            <TextBlock Text='{Binding Key}' Foreground="Gray" Margin="5" FontSize="30" FontFamily="Segoe UI Light" />
                        </DataTemplate>
                    </GroupStyle.HeaderTemplate>

                    <GroupStyle.Panel>
                        <ItemsPanelTemplate>
                            <VariableSizedWrapGrid MaximumRowsOrColumns="2" Orientation="Horizontal" />
                        </ItemsPanelTemplate>
                    </GroupStyle.Panel>

                </GroupStyle>
            </GridView.GroupStyle>


            <GridView.ItemsPanel>
                <ItemsPanelTemplate>
                   <StackPanel Orientation="Vertical" />
                </ItemsPanelTemplate>
            </GridView.ItemsPanel>


        </GridView>

    </Grid>

...

C#:

C＃：

In the Code-Behind I do the following in the OnNavigateTo Method:

在Code-Behind中，我在OnNavigateTo方法中执行以下操作：

        List<string> strList = new List<string>() { 
        "Red", "Red", "Red", "Red", "Red", "Red", 
        "Green", "Green","Green","Green","Green",
        "Blue","Blue","Blue","Blue" };

    var groupedList = from s in strList
                      group s by s into g
                      orderby g.Key
                      select g;


    cvs.Source = groupedList;

No matter what I do, I am not able to group the Items in a continues list like in the Screenshot. The Code results in separate lists grouped side by side.

无论我做什么，我都无法将项目分组到屏幕截图中的连续列表中。该代码导致并排列出的单独列表。

4 个解决方案

#1

I may have a solution. In my projet, I had to create a list of contacts in alphabetic order, like the People app.

我可能有一个解决方案。在我的项目中，我必须按字母顺序创建联系人列表，例如People应用程序。

I used a GridView (with this sample), a CollectionViewSource and a wrappanel I found in the WinRT XAML Toolkit (you can get with NuGet package or copy/paste the source code). It allow you to put your items in columns.

我使用了GridView（带有此示例），一个CollectionViewSource和一个我在WinRT XAML Toolkit中找到的包装器（您可以使用NuGet包或复制/粘贴源代码）。它允许您将项目放在列中。

Example

例

ViewModel

视图模型

class ContactListViewModel
    {

        public ContactListViewModel()
        {
            ContactSource = new CollectionViewSource();
            Contacts = new ObservableCollection<Contact>();

            Contacts.Add(new Contact("Gates","Bill"));
            Contacts.Add(new Contact("Bush","Georges"));
            Contacts.Add(new Contact("Obama","Barack"));
            Contacts.Add(new Contact("Hollande","François"));
            Contacts.Add(new Contact("Affleck","Ben"));
            Contacts.Add(new Contact("Allen","Woody"));
            Contacts.Add(new Contact("Hendrix","Jimi"));
            Contacts.Add(new Contact("Harrison", "Georges"));

            Contacts = new ObservableCollection<Contact>(Contacts.OrderBy(c => c.Name));
            ContactSource.Source = GetGroupsByLetter();
            ContactSource.IsSourceGrouped = true;

        }

        #region Contacts
        public ObservableCollection<Contact> Contacts
        {
            get;
            protected set;
        }

        public CollectionViewSource ContactSource
        {
            get;
            protected set;
        }
        #endregion


        internal List<GroupInfoList<object>> GetGroupsByLetter()
        {
            List<GroupInfoList<object>> groups = new List<GroupInfoList<object>>();

            var query = from item in Contacts
                        orderby ((Contact)item).Name
                        group item by ((Contact)item).Name[0] into g
                        select new { GroupName = g.Key, Items = g };
            foreach (var g in query)
            {
                GroupInfoList<object> info = new GroupInfoList<object>();
                info.Key = g.GroupName;
                foreach (var item in g.Items)
                {
                    info.Add(item);
                }
                groups.Add(info);
            }

            return groups;
        }

        public class GroupInfoList<T> : List<object>
        {

            public object Key { get; set; }


            public new IEnumerator<object> GetEnumerator()
            {
                return (System.Collections.Generic.IEnumerator<object>)base.GetEnumerator();
            }
        }
}

View

视图

 <DataTemplate x:Key="contactTemplate">
    <Grid Width="225" Height="75" Background="#55FFFFFF">
        <Grid Margin="10">
            <Grid.RowDefinitions>
                <RowDefinition/>
                <RowDefinition/>
            </Grid.RowDefinitions>
            <TextBlock VerticalAlignment="Center" HorizontalAlignment="Left" FontSize="20">
                <Run Text="{Binding FirstName}"/>
                <Run Text="{Binding Name}"/>
            </TextBlock>
            <TextBlock Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Left" Text="{Binding Email}" FontSize="13" Foreground="#FFDDDDDD"/>
        </Grid>
    </Grid>
</DataTemplate>

<DataTemplate x:Key="letterTemplate">
    <Grid Margin="5,0,0,5" Width="225">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <TextBlock Text="{Binding Key}" Style="{StaticResource GroupHeaderTextStyle}"  VerticalAlignment="Center"/>
        <Rectangle Grid.Row="1" Fill="#BBEEEEEE" Height="1" Margin="0,7,0,0"/>
    </Grid>
</DataTemplate>
</Page.Resources>



<!--
This grid acts as a root panel for the page that defines two rows:
* Row 0 contains the back button and page title
* Row 1 contains the rest of the page layout
-->
<Grid Style="{StaticResource LayoutRootStyle}">
    <Grid.RowDefinitions>
        <RowDefinition Height="140"/>
        <RowDefinition Height="*"/>
    </Grid.RowDefinitions>

    <!-- Back button and page title -->
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
        <Button x:Name="backButton" Click="GoBack" Style="{StaticResource BackButtonStyle}" Opacity="0"/>
        <TextBlock x:Name="pageTitle" Grid.Column="1" Text="Manager" Style="{StaticResource PageHeaderTextStyle}"/>
    </Grid>

    <GridView Grid.Row="1"
        ItemsSource="{Binding Path=ContactSource.View}"
        SelectionMode="Multiple"
        IsSwipeEnabled="false"
        IsItemClickEnabled="True"
        Padding="116,10,40,46"
        ItemTemplate="{StaticResource contactTemplate}">

        <GridView.ItemsPanel>
            <ItemsPanelTemplate>
                <local:WrapPanel Orientation="Vertical"/>
            </ItemsPanelTemplate>
        </GridView.ItemsPanel>

        <GridView.GroupStyle>
            <GroupStyle HeaderTemplate="{StaticResource letterTemplate}">
                <GroupStyle.Panel>
                    <ItemsPanelTemplate>
                        <VariableSizedWrapGrid Orientation="Vertical" Margin="0,0,80,0"/>
                    </ItemsPanelTemplate>
                </GroupStyle.Panel>
            </GroupStyle>
        </GridView.GroupStyle>
    </GridView>
</Grid>

#2

http://code.msdn.microsoft.com/windowsapps/GroupedGridView-77c59e8e

http://code.msdn.microsoft.com/windowsapps/GroupedGridView-77c59e8e

#3

It can't be done using the default grid view styles.

使用默认网格视图样式无法完成。

You may have to use one none-grouped item list and add special items with different item template ...

您可能必须使用一个非分组项目列表并添加具有不同项目模板的特殊项目...

Sorry

抱歉

#4

I would add the headers as items to the gridview, and use a TemplateSelector to display the elements the right way...

我将标题作为项添加到gridview，并使用TemplateSelector以正确的方式显示元素...