private void priceSearchButton_Click(object sender, EventArgs e) { MobileManager _mobileManager = new MobileManager(); Mobile mobile = new Mobile(); int PriceFrom = Convert.ToInt32(priceFromFieldTextBox.Text); int PriceTo = Convert.ToInt32(priceToFieldTextBox.Text); mobile.PriceFrom = Convert.ToInt32(priceFromFieldTextBox.Text); mobile.PriceTo = Convert.ToInt32(priceToFieldTextBox.Text); resultDataGridView.DataSource = _mobileManager.SearchValue(mobile); }