private void searchCountryTextBox_TextChanged(object sender, EventArgs e)
{
AVLCountry searchTree = new AVLCountry();
string userInput = searchCountryTextBox.Text;
var source = new AutoCompleteStringCollection();
if (userInput == "")
{
//refresh comboBox
countryComboBox.DataSource = CountryAVLTree.GetAllCountries();
countryComboBox.DisplayMember = "countryName";
selectCountryLabel.Text = "Select Country: " + CountryAVLTree.Count().ToString();
//clear search results
foreach (Country search in searchTree.GetAllCountries())
{
searchTree.RemoveItem(search);
}
}
else
{
//clear all user innput
int countryCount = 0;
currentCountry = null;
countryComboBox.Text = "";
selectCountryLabel.Text = "Select Country: 0";
foreach (Country c in CountryAVLTree.GetAllCountries())
{
if (c.CountryName.ToLower().StartsWith(userInput.ToLower().Trim()))
{
source.Add(c.CountryName);
countryCount++;
searchTree.InsertItem(c);
}
}
foreach (Country search in searchTree.GetAllCountries())
{
if (!search.CountryName.ToLower().StartsWith(userInput.ToLower().Trim()))
{
source.Remove(search.CountryName);
countryCount--;
searchTree.RemoveItem(search);
}
}
countryComboBox.DataSource = searchTree.GetAllCountries();
countryComboBox.DisplayMember = "countryName";
selectCountryLabel.Text = "Select Country: " + countryCount;
searchCountryTextBox.AutoCompleteCustomSource = source;
}
}
public AVLCountry fetchAllTradePartners(Country country)
{
AVLCountry tradePartners = new AVLCountry();
foreach (string partnerName in country.TradePartners)
{
foreach (Country c in GetAllCountries())
{
if (c.CountryName == partnerName)
{
tradePartners.InsertItem(c);
}
}
}
return(tradePartners);
}
private void openFileToolStripMenuItem_Click(object sender, EventArgs e)
{
using (OpenFileDialog ofd = new OpenFileDialog()
{
Filter = "CSV Files|*.csv", ValidateNames = true
})
{
if (ofd.ShowDialog() == DialogResult.OK)
{
string[] headers = new string[6]; //column headers
const int MAX_LINES_FILE = 50000;
string[] AllLines = new string[MAX_LINES_FILE];
AllLines = File.ReadAllLines(ofd.FileName); //name of file selected in dialog box
foreach (string line in AllLines)
{
if (line.StartsWith("Country")) //found first line - headers
{
headers = line.Split(',');
}
else
{
//split data using commas
string[] columns = line.Split(',');
LinkedList <String> tradePartnersLinkedList = new LinkedList <string>();
string[] partners = columns[5].Split(';', '[', ']');
foreach (string tradePartner in partners)
{
if (tradePartner != "")
{
tradePartnersLinkedList.AddLast(tradePartner);
}
}
Country c = new Country(columns[0], Double.Parse(columns[1]), Double.Parse(columns[2]),
Double.Parse(columns[3]), int.Parse(columns[4]), tradePartnersLinkedList);
CountryAVLTree.InsertItem(c);
fetchMainForm();
}
}
MessageBox.Show("Operation Complete. Number of countries: " + CountryAVLTree.Count(), "Operation Complete", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
}
