insert data listview in website

try
{
    FbConnection con = new FbConnection("connectionString");
    con.Open();

    FbCommand komut = new FbCommand();

    komut.CommandText = "insert into region(region.id) values ('" + txtid.Text + "')";
    komut.ExecuteNonQuery();
    con.Close();
    Response.Write("added");
}
catch {

    Response.Write("did not add");
}