connexion multiples

bonjour,
voici mon code de connexion ,
mais apres connection j'arrive pas a obtenir la valeure dans l'entier K
aidez moi voici mon code
je sais pas ou se trouve l'erreur je precise que j'ai plusieurs connections
arriver sur While(Reader.read()) il saute la boucle

string myQuery = "";

myQuery =

"SELECT duree, SUM(duree)FROM Site WHERE managedObjectInstance Like'" + enva + "'and periode>='" + date + "'and periode<='" + date1 + "'and Site_ou_cellule='" + text + "'GROUP BY duree ORDER BY duree";

SqlConnection cnx = null;

String cs = "Database=RADIO;Data Source=localhost;Integrated Security=SSPI;Pooling =false;";

cnx =

newSqlConnection(cs);

SqlCommand Cmd = newSqlCommand();

Cmd.Connection = cnx;

Cmd.CommandText = myQuery;

SqlDataReader Reader;

cnx.Open();

Reader = Cmd.ExecuteReader();

int max = 0;

int k = 0;

while (Reader.Read())

{

max += 1;

k +=

Int32.Parse(Reader.GetValue(0).ToString());// contient la duree pour envabtsep:12

 

}

Reader.Close();

cnx.Close();

Cursor.Current = Cursors.Default;

//***********************requette pour obtention de la durée********************************************************

string myQuery1 = "";

myQuery1 =

"SELECT duree, SUM(duree)FROM Site WHERE managedObjectInstance Like'" + enva1 + "'and periode>='" + date + "'and periode<='" + date1 + "'and Site_ou_cellule='" + text + "'GROUP BY duree ORDER BY duree";

SqlConnection cnx1 = null;

String cs1 = "Database=RADIO;Data Source=localhost;Integrated Security=SSPI;Pooling =false;";

cnx1 =

newSqlConnection(cs1);

SqlCommand Cmd1 = newSqlCommand();

Cmd.Connection = cnx;

Cmd.CommandText = myQuery1;

//SqlDataReader Reader;

cnx.Open();

Reader = Cmd.ExecuteReader();

// int max1 = 0;

//int k1 = 0;

while (Reader.Read())

{

max += 1;

x +=

Int32.Parse(Reader.GetValue(0).ToString());//contient la duree pour envabtse:12

//heure_debut.Add(Reader.GetValue(0));//contient les durees en minutes

}

Reader.Close();

cnx1.Close();

Cursor.Current = Cursors.Default;

x = x + k;