Hi Michael,

Removing that does not solve the issue and only adds the problem of my application not recognizing that a row has been selected. As for migrating to the newer package, I do not think that is feasible at this moment in time. From my knowledge this custom class has been implemented a couple of months ago and is shown below:

using Infragistics.Windows.DataPresenter;
using Infragistics.Windows.DataPresenter.Events;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace Vdi.VideoClient.SoftClient.CustomControls
{
    /// <summary>
    /// The BSIXamDataGrid is a custom Infragistics XamDataGrid that allows one to bind to the SelectedItems property
    /// By default, the SelectedItems property does not allow binding.
    /// This class implements a BindableSelectedItems property which can be bound to a property in your ViewModel then manipulated as required
    /// from the ViewModel.
    /// The result is a XamDataGrid that appropriately displays highlights for when a record is selected.
    /// </summary>
    public class BSIXamDataGrid : XamDataGrid
    {
        public static readonly DependencyProperty BindableSelectedItemsProperty = DependencyProperty.Register("BindableSelectedItems", typeof(IEnumerable), typeof(BSIXamDataGrid));

        public IEnumerable BindableSelectedItems
        {
            get { return (IEnumerable)GetValue(BindableSelectedItemsProperty); }
            set { SetValue(BindableSelectedItemsProperty, value); }
        }

        private void BindableSelectedItemsPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
        {
            this.SelectedItemsChanged -= new EventHandler<SelectedItemsChangedEventArgs>(BSIXamDataGrid_SelectedItemsChanged);
            this.ActiveRecord = null;

            if (!this.IsMouseOver)
            {
                this.SelectedItems.Records.Clear();
            }

            if (args.NewValue != null)
            {
                foreach (var item in args.NewValue as IEnumerable)
                {
                    this.SelectedItems.Records.Add(this.GetRecordFromDataItem(item, false));
                }
            }
            this.SelectedItemsChanged += new EventHandler<SelectedItemsChangedEventArgs>(BSIXamDataGrid_SelectedItemsChanged);
        }

        public BSIXamDataGrid() : base()
        {
            this.SelectedItemsChanged += new EventHandler<SelectedItemsChangedEventArgs>(BSIXamDataGrid_SelectedItemsChanged);
            BindableSelectedItemsProperty.OverrideMetadata(typeof(BSIXamDataGrid), new FrameworkPropertyMetadata(BindableSelectedItemsPropertyChanged));
        }

        void BSIXamDataGrid_SelectedItemsChanged(object sender, SelectedItemsChangedEventArgs e)
        {
            List<object> selectedItems = new List<object>();

            foreach (object selectedItem in base.SelectedItems)
            {
                if (selectedItem is Cell)
                    selectedItems.Add(((selectedItem as Cell).Record as DataRecord).DataItem);

                else if (selectedItem is DataRecord)
                    selectedItems.Add((selectedItem as DataRecord).DataItem);
            }

            BindableSelectedItems = selectedItems as IEnumerable;
        }
    }
}

Also I feel like this needs to be included as well:

<CustomControls:BSIXamDataGrid.FieldLayoutSettings>
                        <igDP:FieldLayoutSettings 
                                        x:Uid="igDP:FieldLayoutSettings_1" AllowRecordFixing="Top"
                                        HeaderPlacement="OnTopOnly" AllowDelete="False"
                                        RecordSelectorLocation="None"
                                        SelectionTypeRecord="ExtendedAutoDrag"
                                        AllowFieldMoving="WithinLogicalRow"
                                        HighlightAlternateRecords="False" AutoGenerateFields="False"/>
                    </CustomControls:BSIXamDataGrid.FieldLayoutSettings>

Hi Michael,

The version of Infragistics my application is licensed to use is:

Assembly InfragisticsWPF4.DataPresenter.v12.1, Version=12.1.20121.2286

I'm told by management that upgrading to a newer version isn't financially feasible at the moment so I would like to figure out a work-around for this issue.

Hi Michael,

I'm in the process of adding said Behavior in conjunction with my custom implementation but I'm having a bit of trouble. I believe this method fires as soon as the application launches when it really should run once the window containing the XamDataGrid is launched/opened:

protected override void OnAttached()
        {
            base.OnAttached();

            Grid.SelectedItemsChanged += new System.EventHandler<Infragistics.Windows.DataPresenter.Events.SelectedItemsChangedEventArgs>(Grid_SelectedItemsChanged);
            SelectedItems.CollectionChanged += new NotifyCollectionChangedEventHandler(SelectedItems_CollectionChanged);
        }

The error is that the SelectedItems object appears to be null as it hasn't even been created in the first place:

I'd like to add that the detach code wasn't working because I was passing the behavior instead of the grid. 

Hi Michael,

I'm glad to say that I have finally got it working with all your help!

Here's what I did:

• Removing the reference to my custom implementation of XamDataGrid and using the base version while also including the reference to the newly added behavior in the XAML file
• Implemented the behavior code inside the XAML.cs file since I assume that would fix the issue of the OnAttached method erroring out along with setting the data context of my XamDataGrid to my view model
• Changed SelectedItems in my view model from IEnumerable (as used by the previous method) to ObsevableCollection

I am now able to cycle through the table using my arrow keys and the selected rows are properly assigned accordingly. I will do some further testing but I just wanted to say thank you for all the help you've provided!

Hello Shawn, 

Thank you very much for your patience, I am glad I was able to assist you. Please let us know if you have any additional questions. 

Have a great day!