Get selected row in Gridview (dxexprince 10 aspx.net)

I think this is not the correct way to get the values from the grid at client side, check the following link: http://www.devexpress.com/Support/Center/p/Q94237.aspx

[JScript]
function Button1_onclick() {
    ASPxGridView1.GetSelectedFieldValues("CategoryID;CategoryName", OnGetSelectedFieldValues);
}

function OnGetSelectedFieldValues(result) {
    for(var i = 0; i < result.length; i ++)
        for(var j = 0; j <result[i].length; j++) {
            alert(result[i][j]);
        }
} 

Question: is your grid support multiple selection?

Edit1: Check the following Examples as well:

How to use a GetSelectedFieldValues method to obtain values of several columns at once

How to get the values of the selected record from the server

Just because I have not played with web applications in awhile, I decided to see if this was something I could dupe. Alas, to no avail. This works fine for me:

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!Page.IsPostBack)
        {
            var persons = CreatePersons();
            GridView1.DataSource = persons;
            GridView1.DataBind();
        }
    }

    private List<PersonRecord> CreatePersons()
    {
        var person = new PersonRecord
                         {
                             PersonId = 1,
                             Name = "greg",
                             Title = "Supreme Coder",
                             Description = "Nada",
                             Notes = "foo bar"
                         };

        var person2 = new PersonRecord
        {
            PersonId = 2,
            Name = "Sam",
            Title = "Junior Coder",
            Description = "Nada",
            Notes = "foo bar"
        };

        var list = new List<PersonRecord> {person, person2};

        return list;
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        var row = GridView1.Rows[0];
        var cell = row.Cells[1];
        var value = cell.Text;


    }

    protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
    {
        int index = GridView1.SelectedIndex;
        var row = GridView1.Rows[index];
        var nameCell = row.Cells[2];
        var name = nameCell.Text;

        Label1.Text = name;
    }
}

Yours most likely fails as you are selecting the select column (cell[0]), but I would think you should get something out of this cell (have to play with it). It could also be a bad pattern for binding.