Hello Arpita,

Thank you for your patience while I was looking into the issue that you have described.  After further investigation, I have found a different approach, using the SelectedItemChanged event in order to validate the selection of the XamComboEditor. Using this approach, you can revert to the previous selected item when the validation fail and also you can access the Active Row, using the Utilities class. I have modified the sample application I have previously sent to you, in order to demonstrates how you can implement this approach.

Please let me know if you need any further assistance on the matter.

Sincerely,

Krasimir

Developer Support Engineer

Infragistics

Hello Arpita,

Thank you for the provided sample application.  I have been looking into it and it seems that the reason for the popup that you are displaying, to not hide when you click anywhere within the application is that at the time that the Popup is opened, the popup of the XamComboEditor’s drop down is still open and it catches the mouse down event and the Popup that you are opening does not get notification when you click in the window and t stays open. It seems that this is the expected behavior in wpf platform. You can test this behavior by adding using the following code:

Xaml:

<Window x:Class="WpfApplication1.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">
    <Grid>
        <Popup x:Name="p1" StaysOpen="False">
            <Grid Background="Blue"> 
                <TextBlock Text="asdasd"/>
            </Grid>
        </Popup>


        <Popup x:Name="p2" StaysOpen="False">
            <Grid Background="Red">
                <TextBlock Text="asdasd"/>
            </Grid>
        </Popup>
        <Button Content="Button" 
                Height="23" 
                HorizontalAlignment="Left"
                Margin="187,110,0,0"
                Name="button1"
                VerticalAlignment="Top"
                Width="75" Click="button1_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;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            p1.PlacementTarget = sender as UIElement;
            p2.PlacementTarget = sender as UIElement;
            p1.Placement = System.Windows.Controls.Primitives.PlacementMode.Left;
            p2.Placement = System.Windows.Controls.Primitives.PlacementMode.Right;

            p1.IsOpen = true;
            p2.IsOpen = true;
        }
    }
}

Using this example you can see that one of the popups that are opened at the same time always stay open. What I can suggest is using a Dispatcher, in order to open you popup after the one of the XamComboEditor’s dropdown is closed as follow:

        private void XamComboEditor_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
        {
           // (sender as XamComboEditor).SelectedItemChanged -= XamComboEditor_SelectedItemChanged;

            Data activeRowData = (Utilities.GetAncestorFromType(sender as DependencyObject, typeof(CellControl), false) as CellControl).Cell.Row.Data as Data;

            if (e.OldValue != null && e.NewValue != null)
            {
                Debug.Write("Old: " + (e.OldValue as ComboData).State + " - New: " + (e.NewValue as ComboData).State);

                if ((e.OldValue as ComboData).State.Equals("State 1") && (e.NewValue as ComboData).State.Equals("State 5"))
                {
                  //  MessageBox.Show("State 5 is not valid when State 1 is selected!!!\nActive MandatoryCriteriaList is: " + activeRowData.MandatoryCriteriaList);
                    Dispatcher.BeginInvoke(new Action(() =>
                    {
                    ContentPopUp.IsOpen = true;
                    txtToolTip.Text = "State 5 is not valid when State 1 is selected!!!\nActive MandatoryCriteriaList is: " + activeRowData.MandatoryCriteriaList;
                    ContentPopUp.Placement = PlacementMode.Center;
                    (sender as XamComboEditor).SelectedItem 
                        = ((sender as XamComboEditor).ItemsSource as IEnumerable<ComboData>).Where(i => i.State.Equals("State 1")).FirstOrDefault();
                    }), System.Windows.Threading.DispatcherPriority.SystemIdle, null);
                }

                if ((e.OldValue as ComboData).State.Equals("State 2")
               && ((e.NewValue as ComboData).State.Equals("State 4") || (e.NewValue as ComboData).State.Equals("State 5")))
                {
                    // MessageBox.Show("State 4 and State 5 is not valid when State 2 is selected!!!\nActive MandatoryCriteriaList is: " + activeRowData.MandatoryCriteriaList);

                    Dispatcher.BeginInvoke(new Action(() =>
                    {
                        ContentPopUp.Placement = PlacementMode.Center;
                        ContentPopUp.IsOpen = true;

                        txtToolTip.Text = "State 4 and State 5 is not valid when State 2 is selected!!!\nActive MandatoryCriteriaList is: " + activeRowData.MandatoryCriteriaList;
                        //     
                        (sender as XamComboEditor).SelectedItem
                                     = ((sender as XamComboEditor).ItemsSource as IEnumerable<ComboData>).Where(i => i.State.Equals("State 2")).FirstOrDefault();
                    }), System.Windows.Threading.DispatcherPriority.SystemIdle, null);
                }
            }
          //  (sender as XamComboEditor).SelectedItemChanged += XamComboEditor_SelectedItemChanged;

        }

Please let me know if you need any further assistance on the matter.

Sincerely,

Krasimir

Developer Support Engineer

Infragistics

Hello Arpita,

Thank you for your reply. I am very glad that the approach I have suggested was helpful for you. Please let me know if you need any further assistance on the matter.

Sincerely,

Krasimir

Developer Support Engineer

Infragistics

Hello Arpita,

I am just checking if you require any further assistance on the matter.

Sincerely,

Krasimir

Developer Support Engineer

Infragistics

Hello Arpita,

Thank you for your reply. I am very glad that the approach I have suggested was helpful.  I am using the SetCellValue method, since the Cell.Value property is read only and you can set the value of the cell, through the cell itself. This method is creating a CellValueObject which contains one dependency property and  then creates a Binding between the property that corresponds to the current cell and the Value property of the CellValueObject, through the Data of the current row. After that, it sets the Value property of the CellValueObject, which triggers the Binding and this way the value of the property that corresponds to the cell is set, without interacting with the Data item of the current row.

Regarding the code that you have mentioned,  in the CellExitingEditMode, I am de-attaching the handler, since each time the editor enters edit mode, a handler is attached to the Click event. If this code is commented, the hadnlers of the event will increase with one each time the Cell enters edit mode. This will case multiple execution of the the same function and when you enter ‘n’ times edit mode, for one cell and then click on the CheckBox, you will see that ‘n’ MessageBoxes are opened one after another.

Please let me know if you need any further assistance on the matter.

Sincerely,

Krasimir

Developer Support Engineer

Infragistics