Forms Data Controls :: Selecting More Than 1 Data From CheckBoxList?

I want to select more than one item of CheckBoxList and then search those item from database and then select them.

I wrote this code but it can only select one item at a time.

for (int i = 0; i < CheckBoxList1.Items.Count; i++)
{
if (CheckBoxList1.Items[i].Selected == true)
{
var sql = from x in db.names
where x.name1 == CheckBoxList1.Items[i].ToString()
select x;
GridView1.DataSource = sql.ToList();
GridView1.DataBind();
}
}
}