private void OnComboBoxInput_TextChanged(object sender, EventArgs e)
{
var input = _comboBoxInput.Text.Trim();
var cities = _citiesService.GetCitiesStartsWith(input);
if (cities.Count > 0)
{
_comboBoxInput.DataSource = cities;
_comboBoxInput.DisplayMember = nameof(City.Name);
var sText = _comboBoxInput.Items[0].ToString();
_comboBoxInput.SelectionStart = input.Length;
_comboBoxInput.SelectionLength = sText.Length - input.Length;
_comboBoxInput.DroppedDown = true;
}
else
{
_comboBoxInput.DroppedDown = false;
_comboBoxInput.SelectionStart = input.Length;
}
}