Sql server

Hello,

Could you help me please wit this code? I need to insert this data to my sql server table

using System; using System.Data.SqlClient; using Android.App; using Android.Content; using Android.Runtime; using Android.Views; using Android.Widget; using Android.OS;

namespace Food_Service { [Activity(Label = "Food_Service", MainLauncher = true, Icon = "@drawable/icon")]

public class Activity1 : Activity
{
    System.Data.SqlClient.SqlConnection con;
    string toast;
    TextView txt;

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        SetContentView(Resource.Layout.Main);

        Spinner spinner = FindViewById<Spinner>(Resource.Id.spinner1);

        spinner.ItemSelected += new EventHandler<AdapterView.ItemSelectedEventArgs>(spinner_ItemSelected);
        var adapter = ArrayAdapter.CreateFromResource(
                this, Resource.Array.planets_array, Android.Resource.Layout.SimpleSpinnerItem);

        adapter.SetDropDownViewResource(Android.Resource.Layout.SimpleSpinnerDropDownItem);
        spinner.Adapter = adapter;


        con = new System.Data.SqlClient.SqlConnection();
        con.ConnectionString = "Server=172.18.64.128; Database=Catalogo; User Id=Mccain; Password= mccain01";


        Button button = FindViewById<Button>(Resource.Id.MyButton);

        SqlCommand cmd = new SqlCommand();

        try
        {

            con.Open();
            cmd.CommandText = "Insert Into Vendedore2 (Vendedor) values('" + txt.Text + "')";
            cmd.Connection = con;
            cmd.ExecuteNonQuery();
            button.Click += delegate { button.Text = string.Format("Conexion exitosa"); };
        }
        catch
        {
            button.Click += delegate { button.Text = string.Format("Conexion no exitosa"); };
        }
    }

        public void spinner_ItemSelected (object sender, AdapterView.ItemSelectedEventArgs e)
        {
            Spinner spinner = (Spinner)sender;
            txt = (TextView)FindViewById(Resource.Id.textView1);

            toast = string.Format ("{0}", spinner.GetItemAtPosition (e.Position));
            Toast.MakeText (this, toast, ToastLength.Long).Show ();
            txt.Text = toast;
        }

    }
}