2 DropDownList ten seçilen verileri listview nasıl yazdırırım acil yardım!!!

[caglar3457]

void sol()
{
DataTable dt = vt.GetDataTable("Select * from Departman");
ddlDep.Items.Clear();
for (int i = 0; i < dt.Rows.Count; i++)
{

ddlDep.Items.Add(dt.Rows["Aciklama"].ToString());
ddlDep.Items.Value = dt.Rows["DepartmanId"].ToString();

}


}
protected void ddlDep_SelectedIndexChanged(object sender, EventArgs e)
{


DataTable tablo = vt.GetDataTable("Select * from Kategori where DepartmanId=" + ddlDep.SelectedItem.Value);


ddlKat.Items.Clear();
for (int i = 0; i < tablo.Rows.Count; i++)
{


ddlKat.Items.Add(tablo.Rows["Aciklama"].ToString());
ddlKat.Items.Value = tablo.Rows["DepartmanId"].ToString();

}

}


protected void ddlKat_SelectedIndexChanged(object sender, EventArgs e)
{



SqlDataAdapter adp = new SqlDataAdapter("select * from Urun where KategoriId=@id", baglanti);
adp.SelectCommand.Parameters.AddWithValue("@id", ddlKat.SelectedValue);
baglanti.Open();
DataTable dt = new DataTable();
adp.Fill(dt);
ListView1.DataSource = dt;
ListView1.DataBind();
baglanti.Close();



}
}

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son yazılan listview kodunda yanlışlık mı var acaba