public partial class Modifier : Form { public DataSet ds = new DataSet(); public DataSet ds2 = new DataSet(); public SqlCeConnection conn = new SqlCeConnection(@"Data Source =\Program Files\projetpfe\Inventaire.sdf"); public SqlCeDataAdapter da, da2; public SqlCeCommand cmd, cmd2; public SqlCeDataReader dr,dr2; public Modifier() { InitializeComponent(); this.da = new SqlCeDataAdapter("Select Code_locale from Bureau", conn); // this.da2 = new SqlCeDataAdapter("Select DISTINCT Adresse from Bureau ", conn); this.cmd = new SqlCeCommand("Select Service from Bureau where Code_locale ='" + comboBox1.SelectedItem + "'", conn); this.cmd2 = new SqlCeCommand("Select Nom_resp from Bureau where Code_locale='" + comboBox1.SelectedItem + "'", conn); } private void Modifier_Load(object sender, EventArgs e) { conn.Open(); this.ds.Tables.Clear(); this.da.Fill(this.ds, "Bureau"); comboBox1.DataSource = this.ds.Tables["Bureau"]; comboBox1.DisplayMember = "Code_locale"; this.ds2.Tables.Clear(); this.da2.Fill(this.ds2, "Bureau"); comboBox2.DataSource = this.ds2.Tables["Bureau"]; comboBox2.DisplayMember = "Adresse";*/ dr = cmd.ExecuteReader(); dr2 = cmd2.ExecuteReader(); textBox1.Text = dr.ToString(); }