MySqlCommand cm = new MySqlCommand("seleccionidproveedor1", conectar);
        cm.CommandType = CommandType.StoredProcedure;

        MySqlDataAdapter da = new MySqlDataAdapter(cm);
        DataTable dt = new DataTable();
        da.Fill(dt);

        ComboidproveedorCC.ValueMember = "IdProveedor";
         ComboidproveedorCC.DataSource=dt;


    }