Freeze GridView Header and first row using jQuery in ASP.Net

Hi felipe.oli,

I have created a sample which full fill your requirement

HTML

<div>
    <div id="container" style="overflow: scroll; overflow-x: hidden">
    </div>
    <asp:GridView ID="GridView1" runat="server">
    </asp:GridView>
</div>
<div>
    <script type="text/javascript" src='http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.8.3.min.js'></script>
    <script type="text/javascript">
        $(document).ready(function () {
            var width = new Array();
            var table = $("table[id*=GridView1]"); //Pass your gridview id here.
            table.find("th").each(function (i) {
                width[i] = $(this).width();
            });
            headerRow = table.find("tr:first");
            headerRow.find("th").each(function (i) {
                $(this).width(width[i]);
            });
            firstRow = table.find("tr:first").next();
            firstRow.find("td").each(function (i) {
                $(this).width(width[i]);
            });
            var header = table.clone();
            header.empty();
            header.append(headerRow);
            header.append(firstRow);
            header.css("width", width);
            $("#container").before(header);
            table.find("tr:first td").each(function (i) {
                $(this).width(width[i]);
            });
            $("#container").height(300);
            $("#container").width(table.width() + 20);
            $("#container").append(table);
        });
    </script>
</div>

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        SqlConnection con = new SqlConnection(constr);
        SqlCommand cmd = new SqlCommand("SELECT CustomerId,ContactName,City,Country FROM Customers", con);
        SqlDataAdapter sda = new SqlDataAdapter(cmd);
        DataTable dt = new DataTable();
        sda.Fill(dt);
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }
}

ScreenShot