Data Selection - Linking DataView and DataGrid

Question

Ok, I am creating a standalone C# program. I currenly have the following.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Xml;

namespace tmp
{
public partial class frmPlayerSelect : Form
{
    DataSet ds = new DataSet();
    DataView dvFilter = new DataView();

    public frmPlayerSelect()
    {
        InitializeComponent();
    }

    private void btnPopulate_Click(object sender, EventArgs e)
    {
        playerChecklist();
    }

    private void playerChecklist()
    {
        //read the XML file
        ds.ReadXml("PlayerList.xml");

        //Create a DataView for the table
        dvFilter.Table = ds.Tables["Player"];

        //Set the datasource of the DataGrid to the DataView
        dgPlayerList.DataSource = dvFilter;
    }

    private void txtFilter_TextChanged(object sender, EventArgs e)
    {
        dvFilter.RowFilter = "Name like '%" + txtFilter.Text + "%'";
        //dgPlayerList.DataSource = dvFilter;
    }

    private void btnSelect_Click(object sender, EventArgs e)
    {

    }
}
}

What I would like to have happen is the following. I want to populate the DataGrid with data provided by the DataView. I want to use the Dataview to filter data that the DataGrid displays. The XML file holds a list of players. I was to use the DataView to filter results so that selecting a player is easier. So far that part works. But when I select a checkbox (added to the grid before populating) and clear the filter (delete the text in the textbox) the check mark goes away. And vice versa if I check a checkbox before doing the filter.

Any hlep would be greatly appreciated.