private void Button_Search_Click(object sender, RoutedEventArgs e)
        {
            if (TabItem_Users.IsSelected)
            {
                if (TextBox_SearchValue.Text != "")
                {
                    List<ViewUser> list = new List<ViewUser>();
                    using (var db = new DataServiceClient())
                    {
                        foreach (var item in db.GetUsers())
                        {
                            if (SearchHelper.CompareStrings(TextBox_SearchValue.Text, item.AsString()))
                            {
                                list.Add(item);
                            }
                        }
                    }
                    DataGrid_Users.ItemsSource = list;
                }
                else
                {
                    MessageBox.Show("Enter some value");
                }

            }
            else if (TabItem_ObjOfTransact.IsSelected)
            {
                if (TextBox_SearchValue.Text != "")
                {
                    List<ViewObjOfTransact> list = new List<ViewObjOfTransact>();
                    using (var db = new DataServiceClient())
                    {
                        foreach (var item in db.GetObjectOfTransactions())
                        {
                            if (SearchHelper.CompareStrings(TextBox_SearchValue.Text, item.AsString()))
                            {
                                list.Add(item);
                            }
                        }
                    }
                    DataGrid_ObjOfTransact.ItemsSource = list;
                }
                else
                {
                    MessageBox.Show("Enter some value");
                }

            }
            else if (TabItem_Deals.IsSelected)
            {
                if (TextBox_SearchValue.Text != "")
                {
                    List<ViewDeal> list = new List<ViewDeal>();
                    using (var db = new DataServiceClient())
                    {
                        foreach (var item in db.GetDeals())
                        {
                            if (SearchHelper.CompareStrings(TextBox_SearchValue.Text, item.AsString()))
                            {
                                list.Add(item);
                            }
                        }
                    }
                    DataGrid_Deals.ItemsSource = list;
                }
                else
                {
                    MessageBox.Show("Enter some value");
                }

            }
        }
 private void UpdateObjectOfTransaction()
 {
     using (var dataAccess = new DataServiceClient())
     {
         DataGrid_ObjOfTransact.ItemsSource = dataAccess.GetObjectOfTransactions();
         DataGrid_ObjOfTransact.IsReadOnly = true;
     }
 }
        private void ComboBox_Seller_LostFocus(object sender, RoutedEventArgs e)
        {
            if (ComboBox_Seller.Text != "")
            {
                ActivateTools();

                int id;
                int.TryParse(ComboBox_Seller.Text,out id);
                ComboBox_ObjOfTransact.ItemsSource = null;

                using (var data = new DataServiceClient())
                {
                    var temp = data.GetObjectOfTransactions();
                    var source = temp.Where(x => x.UserID == id).Select(x => x.ObjectOfTransactionID);
                    ComboBox_ObjOfTransact.ItemsSource = source;
                }
            }
        }