// upload csv of visitors information
private void upload_csv_Click(object sender, EventArgs e)
{
// pops a dialog box for user to navigate through directories
OpenFileDialog open_file_dialog = new OpenFileDialog();
DialogResult result = open_file_dialog.ShowDialog();
if (result == DialogResult.OK)
{
string file_path = open_file_dialog.FileName;
file_name_label.Text = file_path;
// reads from the csv file, populates and returns the list of uploaded visitors
List <Visitor> uploadedVisitorsList = visitorController.readVisitorCSV(file_path);
// writing data into currently referenced csv file
foreach (Visitor v in uploadedVisitorsList)
{
visitorController.writeVisitorsData(v, visitor_file);
}
// using merge sort to sort by visitor id
VisitorList = visitorController.mergeSort(VisitorList);
visitors_table.Rows.Clear();
visitors_table.Refresh();
// inserting into table
foreach (Visitor visitor in VisitorList)
{
this.insertToTable(visitor);
}
}
}
