je n'arrive pas a executer cette requete :

Dim queryString112 As String = "SELECT Cast(Left(DateEnr,11) as DateTime) AS DateEnr FROM QteReel WHERE Cast(Left(DateEnr,11) as DateTime)=" & yearSelect.SelectedValue & "Group by Cast(Left(DateEnr,11) as DateTime) order by Cast(Left(DateEnr,11) as DateTime) desc"

yearSelect.SelectedValue : je recupere la valeur dans une listebox => ca me renvoi une erreur