I have a main form.

On main form I placed a user control.

I raise an event from the user control.

I catch the event on the form.

There, I fill a webgrid on the form.

The problem is the WebGrid doesnt show the data.

User control:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class EditRecord : System.Web.UI.UserControl
{
    public delegate void OptionChangedEventHandler();
    public event OptionChangedEventHandler OptionChangedEvent;

    protected void Page_Load(object sender, EventArgs e)
    {
    }



    protected void ButtonConfirm_Click(object sender, EventArgs e)
    {
        OptionChangedEventHandler handler = OptionChangedEvent;
        handler();
    }

}

Main page:

using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using DealsRoomDAL;
using System.Data;
using DealingRoom.Utils.BuisnessDays;
using DealingRoom.Utils.BasicManiputlations;
using Infragistics.Web.UI.EditorControls;

public partial class _Default : System.Web.UI.Page
{
 
    protected void Page_Load(object sender, EventArgs e)
    {
        EditRecord1.OptionChangedEvent += new EditRecord.OptionChangedEventHandler(EditRecord1_OptionChangedEvent);
    }

    void PopulateGrid()
    {
        List<string> optionValuesLs = new List<string>();
        string s = "x";
        optionValuesLs.Add(s);
        WebDataGrid1.DataSource = optionValuesLs;
        WebDataGrid1.DataBind();
    }
    void EditRecord1_OptionChangedEvent()
    {
        PopulateGrid();      
    }
   
   
}