private void Button_Click(object sender, RoutedEventArgs e) { INCOME_Model income = new INCOME_Model(); income.income_user_FK = id; income.income_date = DatePicker1.SelectedDate; income.income_size = Convert.ToInt32(TextBox1.Text); income.income_guide_FK = Convert.ToInt32(ComboBox1.SelectedValue); bd.CreateINCOME(income); }