how to populate a listview from a datatable
DataTable dt = new DataTable();
    SqlConnection conn = new SqlConnection(@"connectionstring");
    SqlCommand ccmd = new SqlCommand("SELECT img FROM '" + user + "'", conn);
    conn.Open();

    SqlDataAdapter da = new SqlDataAdapter(ccmd);
    da.SelectCommand = ccmd;
    da.Fill(dt);

listView.DataSource = dt;
listView.DataBind();