Select the grid row when you click on enter from autocomplete textbox

Protected void Gv_OnRowDataBound(object sender, GridViewRowEventArgs e)
{
             if(e.Row.RowType==DataControlRowType.DataRow)
             {
                            if(txtVal.Text!=string.Empty)
                            {
                                         string cellVal=((Label)e.Row.FindControl("lblVal")).ToString();
                                         if(cellVal.ToUpper().ToString().Contains(txtVal.Text.ToUpper().ToString())
                                         {
                                                     ((CheckBox)e.Row.FindControl("chkSel")).Checked=true;
                                         }
                            }
             }
}

Protected Void bntClick(object sender, EventArgs e)
{
              //rebind your grid
}

$(document).ready(function() {
  $(window).keydown(function(event){
    if(event.keyCode == 13) {
      event.preventDefault();
      return false;
    }
  });
});