在 Datagrid wpf 上对数据进行分组
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时间：2020-09-13 14:03:02 来源:igfitidea点击:
Grouping data on Datagrid wpf
提问by mm8
I want to regroup my data with an expander that contains the group name and contains all ClassMate name inside.
我想用一个包含组名并在其中包含所有 ClassMate 名称的扩展器重新组合我的数据。
This is my class Group :
这是我的班级组：
public class Group{
public List<ClassMate> CLGroup { get; set; }
public string GroupName { get; set; }}
My classMate class :
我的 classMate 类：
public class ClassMate: INotifyPropertyChanged{
public string Name { get; set; }
public string DisplayName { get; set; }}
I tried to do this with this Xaml but I don't know why it's not working
我试图用这个 Xaml 做到这一点，但我不知道为什么它不起作用
<DataGrid x:Name="gridMates" ItemsSource="{Binding Groups }" >
<DataGrid.GroupStyle>
<!-- Style for groups at top level. -->
<GroupStyle>
<GroupStyle.ContainerStyle>
<Style TargetType="{x:Type GroupItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GroupItem}">
<Expander IsExpanded="True" >
<Expander.Header>
<DockPanel>
<TextBlock Text="{Binding Path=GroupName}" />
</DockPanel>
</Expander.Header>
<Expander.Content>
<ItemsControl ItemsSource="{Binding Path=CLGroup}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Path=DisplayName}"/>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Expander.Content>
</Expander>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupStyle.ContainerStyle>
</GroupStyle>
</DataGrid.GroupStyle>
What am I doing wrong? Thanks
我究竟做错了什么？谢谢
回答by mm8
You need to bind the ItemsSourceproperty to a grouped source collection. The easiest way to do this is to use a CollectionViewSource:
您需要将该ItemsSource属性绑定到分组的源集合。最简单的方法是使用CollectionViewSource：
<Grid>
<Grid.Resources>
<CollectionViewSource x:Key="groups" Source="{Binding Groups}">
<CollectionViewSource.GroupDescriptions>
<PropertyGroupDescription PropertyName="GroupName" />
</CollectionViewSource.GroupDescriptions>
</CollectionViewSource>
</Grid.Resources>
<DataGrid x:Name="gridMates" ItemsSource="{Binding Source={StaticResource groups}}" AutoGenerateColumns="False">
<DataGrid.GroupStyle>
<GroupStyle>
<GroupStyle.ContainerStyle>
<Style TargetType="{x:Type GroupItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GroupItem}">
<Expander IsExpanded="True" >
<Expander.Header>
<DockPanel>
<TextBlock Text="{Binding Path=Name}" />
</DockPanel>
</Expander.Header>
<Expander.Content>
<ItemsControl ItemsSource="{Binding Path=Items[0].CLGroup}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Path=DisplayName}"/>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Expander.Content>
</Expander>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupStyle.ContainerStyle>
</GroupStyle>
</DataGrid.GroupStyle>
</DataGrid>
</Grid>
回答by Vinoth Raj
XAML Design
XAML 设计
<Window.Resources>
<Style x:Key="groupheaderstyle" TargetType="{x:Type GroupItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GroupItem}">
<Expander x:Name="exp" IsExpanded="True" Background="White" Foreground="Black">
<Expander.Header>
<TextBlock Text="{Binding Gropname}" />
</Expander.Header>
<ItemsPresenter />
</Expander>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<DataGrid x:Name="dgdata" HorizontalAlignment="Left" Height="269" VerticalAlignment="Top" Width="292">
<DataGrid.GroupStyle>
<GroupStyle ContainerStyle="{StaticResource groupheaderstyle}">
<GroupStyle.Panel>
<ItemsPanelTemplate>
<DataGridRowsPresenter />
</ItemsPanelTemplate>
</GroupStyle.Panel>
</GroupStyle>
</DataGrid.GroupStyle>
</DataGrid>
XAML Design.CS
XAML设计
public class group
{
public string groupname { get; set; }
public string CLgroup { get; set; }
public string displayname { get; set; }
}
public Window4()
{
InitializeComponent();
ObservableCollection<group> samdata = new ObservableCollection<group>
{
new group{groupname="Group1",CLgroup="xxx",displayname="demo1"},
new group{groupname="Group1",CLgroup="yyy",displayname="demo2"},
new group{groupname="Group1",CLgroup="yyy",displayname="demo2"},
new group{groupname="Group2",CLgroup="yyy",displayname="demo2"},
new group{groupname="Group2",CLgroup="yyy",displayname="demo2"},
new group{groupname="Group2",CLgroup="yyy",displayname="demo2"},
new group{groupname="Group3",CLgroup="zzz",displayname="demo3"},
new group{groupname="Group3",CLgroup="yyy",displayname="demo2"},
new group{groupname="Group3",CLgroup="yyy",displayname="demo2"},
};
ListCollectionView collection = new ListCollectionView(samdata);
collection.GroupDescriptions.Add(new PropertyGroupDescription("groupname"));
dgdata.ItemsSource = collection;
}
