Hi Andrew,

Thank you for the reply , I have need to use XamMultiColumnComboEditor as it offers search capabilities, the approach that I have taken works without  any issues , the issue is when I use the scrollbar , wondering why would the selection changed on the combo is getting fired , which in turn the clearing the existing cell values , I would like to know if there is way to prevent this clearing of data when the vertical scrollbar is used .We have been using IG controls for the past 4+ years , this is the first time we are encountering such an issue .Any help to resolve this would be greatly appreciated as this blocking the release of critical feature.

Regards,

Rajesh

Hi Andrew,

I tried to load the sample which you sent , it didn't seem to work for me.

I'm able to reproduce this issue consistently in a standalone application , the problems seems to stem from the fact whenever we use the scrollbar , each row is trying to reload the itemsource which in-turn is triggering the selectionchanged event , this seems to be an issue only with XamComboEditors, we have around 20 columns with different set of usercontrols like combobox , which are working fine . Please investigate further into this.

 below are the snippets from sample app,

Xaml

<igDP:XamDataGrid DataSource="{Binding Path=Data}">
<igDP:XamDataGrid.FieldLayouts>
<igDP:FieldLayout>
<igDP:FieldLayout.Fields>
<igDP:Field Name="name"/>
<igDP:UnboundField Name="AvailableProductsList" BindingPath="ProductSelected" Label="Available Products" BindingMode="TwoWay">
<igDP:UnboundField.Settings>
<igDP:FieldSettings>
<igDP:FieldSettings.EditorStyle>
<Style TargetType="{x:Type igEditors:XamComboEditor}">
<Setter Property="ItemsSource" Value="{Binding DataItem.Products}"/>
<Setter Property="SelectedItem" Value="{Binding DataItem.ProductSelected}"/>
</Style>
</igDP:FieldSettings.EditorStyle>
</igDP:FieldSettings>
</igDP:UnboundField.Settings>
</igDP:UnboundField>
<igDP:Field Name="salary"/>
<igDP:Field Name="email"/>
</igDP:FieldLayout.Fields>
</igDP:FieldLayout>
</igDP:XamDataGrid.FieldLayouts>
</igDP:XamDataGrid>

Code Behind

using Infragistics.Windows.DataPresenter;
using Infragistics.Windows.Editors;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
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.Events;

namespace SelectedIndexChange
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public SampleData Data { get; set; }

public MainWindow()
{
InitializeComponent();
Data = new SampleData();
this.DataContext = this;
}

}

public class SampleDataItem : INotifyPropertyChanged
{
#region INotifyPropertyChanged Implementation
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
#endregion

public string name { get; set; }
public string department { get; set; }
public double salary { get; set; }
public string email { get; set; }

public string UniId { get; set; }

public ObservableCollection<string> Products { get; set; }
private int _productsSelectedIndex;
public int ProductsSelectedIndex
{
get { return _productsSelectedIndex; }
set
{
_productsSelectedIndex = value;
OnPropertyChanged("ProductsSelectedIndex");
}
}

private string _productSelected;
public string ProductSelected
{
get { return _productSelected; }
set
{
_productSelected = value;
OnPropertyChanged("ProductSelected");
}
}
}

public class SampleData : ObservableCollection<SampleDataItem>
{
public SampleData()
{
var products = new ObservableCollection<string>
{
"product 1",
"product 2",
"product 3",
};

var products1 = new ObservableCollection<string>
{
"product 4",
"product 5",
"product 6",
};

var products3 = new ObservableCollection<string>
{
"product 7",
"product 8",
"product 9",
};

var products4 = new ObservableCollection<string>
{
"product 10",
"product 11",
"product 12",
};

Add(new SampleDataItem {UniId = "1:" +Guid.NewGuid().ToString(), name = "Joe", department = "Sales", salary = 70000.0, email = "joe@email.com", Products = products, ProductSelected = products[1] });
Add(new SampleDataItem { UniId = "2:" + Guid.NewGuid().ToString(), name = "Mary", department = "Engineering", salary = 71000.0, email = "mary@email.com", Products = products, ProductSelected = products[2] });
Add(new SampleDataItem { UniId = "3:" + Guid.NewGuid().ToString(), name = "Jim", department = "Sales", salary = 72000.0, email = "jim@email.com", Products = products, ProductSelected = products[0] });

Add(new SampleDataItem { UniId = "4:" + Guid.NewGuid().ToString(), name = "Joe", department = "Sales", salary = 70000.0, email = "joe@email.com", Products = products, ProductSelected = products1[1] });
Add(new SampleDataItem { UniId = "5:" + Guid.NewGuid().ToString(), name = "Mary", department = "Engineering", salary = 71000.0, email = "mary@email.com", Products = products, ProductSelected = products1[2] });
Add(new SampleDataItem { UniId = "6:" + Guid.NewGuid().ToString(), name = "Jim", department = "Sales", salary = 72000.0, email = "jim@email.com", Products = products, ProductSelected = products1[0] });

Add(new SampleDataItem { UniId = "7:" + Guid.NewGuid().ToString(), name = "Joe", department = "Sales", salary = 70000.0, email = "joe@email.com", Products = products, ProductSelected = products3[1] });
Add(new SampleDataItem { UniId = "8:" + Guid.NewGuid().ToString(), name = "Mary", department = "Engineering", salary = 71000.0, email = "mary@email.com", Products = products, ProductSelected = products3[2] });
Add(new SampleDataItem { UniId = "9:" + Guid.NewGuid().ToString(), name = "Jim", department = "Sales", salary = 72000.0, email = "jim@email.com", Products = products, ProductSelected = products3[0] });

Add(new SampleDataItem { UniId = "10:" + Guid.NewGuid().ToString(), name = "Joe", department = "Sales", salary = 70000.0, email = "joe@email.com", Products = products, ProductSelected = products4[1] });
Add(new SampleDataItem { UniId = "11:" + Guid.NewGuid().ToString(), name = "Mary", department = "Engineering", salary = 71000.0, email = "mary@email.com", Products = products, ProductSelected = products4[2] });
Add(new SampleDataItem { UniId = "12:" + Guid.NewGuid().ToString(), name = "Jim", department = "Sales", salary = 72000.0, email = "jim@email.com", Products = products, ProductSelected = products4[0] });
}
}
}