gridView doesn't show anything from datasource cs

hello everyone, i'm trying to show the result of a select query into a gridview but i can't to get it work :(. this is my table :
    cartID    userID    productID     -------------------------------     001          A111111    file1     002          A111111    fileq     003          A222222    file2     004          A222222    file3     005          A111111    file4     006          A333333    file5     007          A333333    file6
this is the result of the query :
    nomProduit    prix         ----- ...