private void checkFilter()
{
if (comboBoxSearch.SelectedItem != null &&
comboBoxSearch.SelectedItem.ToString() != "" &&
textBoxSearch.Text.ToString() != "")
{
var listBillss = db.Bills.ToList();
var filterBills = listBillss.FindAll(Bills => Bills.GetType().GetProperty(comboBoxSearch.SelectedItem.ToString()).GetValue(Bills).ToString() == textBoxSearch.Text.ToString());
dataGridView.DataSource = filterBills;
}
else
{
dataGridView.DataSource = getDataSource();
}
}
