Question

I am using inplace editing on a RadGrid that is built using a class file. Everything is working well except I am having an issue the SelectedIndexChanged event not firing when the grid is in edit mode. Any thoughts?

private void RadGrid_ItemCreated(object sender, GridItemEventArgs e)
{
    if (e.Item is GridEditableItem && e.Item.IsInEditMode)
    {
        try
        {
            if ((e.Item as GridDataItem) == null) { return; }
            ((RadNumericTextBox) (e.Item as GridDataItem)["Percentage"].Controls[0]).Width = Unit.Pixel(75);
            ((TextBox) (e.Item as GridDataItem)["Code"].Controls[0]).Width = Unit.Pixel(75);

            RadComboBox _participantList = (e.Item as GridEditableItem)["ID"].Controls[0] as RadComboBox;
            if (null == _participantList) { return; }

            _participantList.Width = Unit.Pixel(120);
            _participantList.DataValueField = "ID";
            _participantList.DataTextField = "ID";
            _participantList.AutoPostBack = true;
            _participantList.DataSource = MAASBaseInterface.ParticipantAPI.GetParticipants();
            _participantList.DataBind();
            _participantList.SelectedIndexChanged += new RadComboBoxSelectedIndexChangedEventHandler(_participantList_SelectedIndexChanged);

            if (!(e.Item.DataItem is GridInsertionObject))
                _participantList.SelectedValue = ((Participant) (e.Item.DataItem)).ID.ToString();
            if (e.Item.DataItem is GridInsertionObject)
                _participantList.EmptyMessage = "-- Select --";
        }
        catch (Exception ex)
        {

            string _ex = ex.Message;
        }
    }
} 

void _participantList_SelectedIndexChanged(object sender, RadComboBoxSelectedIndexChangedEventArgs e)
{
    //first reference the edited grid item through the NamingContainer attribute
    GridEditableItem editedItem = (sender as RadComboBox).NamingContainer as GridEditableItem;
    int _selectedValue = Convert.ToInt32((editedItem["ID"].Controls[0] as RadComboBox).SelectedValue);
    ParticipantList _participants = MAASBaseInterface.ParticipantAPI.GetParticipants();
    Participant _participant = _participants.Where(a => a.ID == _selectedValue) as Participant;
    RadTextBox _code = editedItem["Code"].Controls[0] as RadTextBox;
    _code.ReadOnly = false;
    _code.Text = _participant.Code;
}

Answer 1

The problem was that I was only setting the Value property of the RadComboBox and not the Text property. Even though text value was showing in the RadComboBox in edit mode apparently it was displaying the Value property. As soon as it was set it started posting back just like it was supposed to do.

                if (!(e.Item.DataItem is GridInsertionObject))
                {
                    _participantList.SelectedValue =
                        ((ReinsuranceAgreementParticipant) (e.Item.DataItem)).LegacyReinsurerID.ToString();
                    // I added this line
                    _participantList.Text = ((ReinsuranceAgreementParticipant)(e.Item.DataItem)).LegacyReinsurerID.ToString();
                }
                if (e.Item.DataItem is GridInsertionObject)
                    _participantList.EmptyMessage = "Select Reinsurer";