Hello Team,

I am trying to set the headers for the subrows in a xamdatagrid. How can I achieve that?

Below is the source code for a sample project that has expandable rows. I have also attached the project so you can download it:

XAML

<Window xmlns:ig="http://schemas.infragistics.com/xaml" x:Class="ExapndAllMenu.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525"
xmlns:local="clr-namespace:ExapndAllMenu"
xmlns:igDP="http://infragistics.com/DataPresenter">
<Grid>
<igDP:XamDataGrid
Name="xamDataGrid1"
DataSource="{Binding Data}">
<igDP:XamDataGrid.FieldLayoutSettings>
<!-- Set the ExpansionIndicatorDisplayMode so that when a record
is displayed it will be checked to see if it has any child
records. The expansions indicator will only be displayed
if the record has children. -->
<igDP:FieldLayoutSettings ExpansionIndicatorDisplayMode="CheckOnDisplay"/>
</igDP:XamDataGrid.FieldLayoutSettings>
<igDP:XamDataGrid.Resources>
<local:ShouldDisplayMenuConverter x:Key="ShouldDisplayMenu"/>
<Style TargetType="{x:Type igDP:HeaderPrefixArea}">

<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<ig:XamMenu Visibility="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type igDP:DataRecordPresenter}}, Converter={StaticResource ShouldDisplayMenu}}">
<ig:XamMenuItem Header="!">
<ig:XamMenuItem Header="Expand All" Click="XamMenuItem_Click"/>
</ig:XamMenuItem>
</ig:XamMenu>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</igDP:XamDataGrid.Resources>
</igDP:XamDataGrid>

<Button Content="Expand First Record" HorizontalAlignment="Left" VerticalAlignment="Bottom" Margin="10" Click="Button_Click"/>
</Grid>
</Window>

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Infragistics.Windows.DataPresenter;
using System.Collections.ObjectModel;

namespace ExapndAllMenu
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();

Data = new ObservableCollection<Data>();

for (int i = 0; i < 10; i++)
{
Data d = new Data { Children = new ObservableCollection<Data>(), ID = i, Name = "Parent " + i };

if (i != 4)
for (int j = 0; j < 5; j++)
{
Data d1 = new Data { Children = new ObservableCollection<Data>(), ID = j, Name = "Child " + i + j };

for (int p = 0; p < 5; p++)
{
d1.Children.Add(new Data { ID = p, Name = "Child " + j + p });
}

d.Children.Add(d1);
}

Data.Add(d);
}

DataContext = this;
}

public ObservableCollection<Data> Data { get; set; }

private void XamMenuItem_Click(object sender, EventArgs e)
{
xamDataGrid1.Records.ExpandAll(true);
}

private void Button_Click(object sender, RoutedEventArgs e)
{
xamDataGrid1.Records[0].IsExpanded = true;
}
}

public class ShouldDisplayMenuConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
DataRecordPresenter rec = value as DataRecordPresenter;
if (rec != null)
{
if ((rec.Record as HeaderRecord).AttachedToRecord.ParentRecord == null)
return Visibility.Visible;
}

return Visibility.Collapsed;
}

public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}

public class Data
{
public int ID { get; set; }
public string Name { get; set; }
public ObservableCollection<Data> Children { get; set; }
}
}

Thank you.