Problem with the database WPF application it cannot add anything - database

Question

I was trying to add new row to my database table and it seams that everything is going well in the application WPF and when i close the application the database has not changed(new record was not added in the database ) I tried to use dataadapters so here is my class that i use and the code behing
DD.cs
namespace WpfApplication2
{
class DD
{
private Database1DataSetTableAdapters.Table1TableAdapter _cpuAdapter = null;
protected Database1DataSetTableAdapters.Table1TableAdapter Adapter
{
get
{
if (_cpuAdapter == null)
_cpuAdapter = new Database1DataSetTableAdapters.Table1TableAdapter();
return _cpuAdapter;
}
}
[System.ComponentModel.DataObjectMethodAttribute
(System.ComponentModel.DataObjectMethodType.Insert, true)]
public bool AddCPU(string Naslov, string Avtor, string Lokacija, int Broj, string
Zabeleska, string Izdava)
{
Database1DataSet.Table1DataTable cpus = new Database1DataSet.Table1DataTable();
Database1DataSet.Table1Row cpu = cpus.NewTable1Row();
cpu.Naslov = Naslov;
if (Naslov == null) cpu.SetNaslovNull();
else cpu.Naslov = Naslov;
if (Avtor == null) cpu.SetAvtorNull();
else cpu.Avtor = Avtor;
if (Zabeleska == null) cpu.SetZabeleskaNull();
else cpu.Zabeleska = Zabeleska;
if (Izdava == null) cpu.SetIzdavaNull();
else cpu.Izdava = Izdava;
if (Broj == null) cpu.SetBrojNull();
else cpu.Broj = Broj;
if (Lokacija == null) cpu.SetLokacijaNull();
else cpu.Lokacija = Lokacija;
cpus.AddTable1Row(cpu);
int rowsAffected = Adapter.Update(cpus);
// Return true if precisely one row was inserted, otherwise false
return rowsAffected == 1;
}
HERE IS THE CODE BEHIND
it's an event on button click
string n, a, z,t,l;
int b;
l = txtLokacija.Text;
t = txtBroj.Text;
b = Convert.ToInt32(t);
n = txtNaslov.Text;
a = txtAvtor.Text;
z = txtZabeleska.Text;
t = "NONE";
txtZabeleska.Clear();
DD obj1=new DD();
obj1.AddCPU(n,a,l,b,z,t);

Answer 1

I found IT....when i finished the application and published then it seemed everything ok the database was working properly..i;ve restarted the PC and the newly added record