private void ConventionalReadButton_Click(object sender, EventArgs e)
{
_customerBindingListView = null;
dataGridView1.DataSource = null;
ElapsedTimeLabel.Text = "00:00:00";
ElapsedTimeLabel.Refresh();
var watch = new Stopwatch();
watch.Start();
var customers = FileReader.ConventionalRead(_fileNameToReadFrom);
_customerBindingListView = new SortableBindingList <Customer>(customers);
_customersBindingSource.DataSource = _customerBindingListView;
dataGridView1.DataSource = _customersBindingSource;
dataGridView1.Columns["CustomerIdentifier"].Visible = false;
/*
* SuspendLayout and ResumeLayout will not really help
*/
if (ExpandColumnsCheckBox.Checked)
{
dataGridView1.SuspendLayout();
dataGridView1.ExpandColumns();
dataGridView1.ResumeLayout();
}
ElapsedTimeLabel.Text = watch.Elapsed.ToString("mm\\:ss\\.ff");
}
/// <summary>
/// Depending on several factors the first time asking for
/// the current date time may take around five seconds and
/// cause the user interface to become unresponsive without
/// running code in a Task.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void GetCurrentDateTimeButton_Click(object sender, EventArgs e)
{
ElapsedTimeLabel.Text = "00-00-00";
ElapsedTimeLabel.Refresh();
var watch = new Stopwatch();
watch.Start();
var operation = new DateTimeFromInternet();
var result = await operation.Formatted();
watch.Stop();
ElapsedTimeLabel.Text = watch.Elapsed.ToString("mm\\:ss\\.ff");
if (Convert.ToDateTime(result) == DateTime.MinValue)
{
MessageBox.Show("Failed to get current date time");
}
else
{
MessageBox.Show(result);
}
}
/// <summary>
/// Read file using StreamReader.ReadLineAsync, create a new customer in each
/// iteration in a while statement.
///
/// First three lines are to allow the developer to see the sources are cleared
/// before running the code to populate the DataGridView.
///
/// This method is slow from combining reading lines/parsing then adding a customer to a list.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void Example1Button_Click(object sender, EventArgs e)
{
//dataGridView1.RowHeadersWidthSizeMode = DataGridViewRowHeadersWidthSizeMode.EnableResizing;
var waitForm = new WaitForm()
{
TopLevel = true, TopMost = true
};
waitForm.Show(this);
waitForm.Top = (Top + (Height / 2)) - waitForm.Height / 2;
waitForm.Left = (Left + (Width / 2)) - waitForm.Width / 2;
ElapsedTimeLabel.Text = "00:00:00";
ElapsedTimeLabel.Refresh();
var watch = new Stopwatch();
watch.Start();
try
{
_customerBindingListView = null;
dataGridView1.DataSource = null;
await Task.Delay(500);
var customers = await FileReader.ReadAllLinesAsync(_fileNameToReadFrom).ConfigureAwait(false);
_customerBindingListView = new SortableBindingList <Customer>(customers.ToList());
dataGridView1.InvokeIfRequired(d =>
{
_customersBindingSource.DataSource = _customerBindingListView;
dataGridView1.DataSource = _customersBindingSource;
dataGridView1.Columns["CustomerIdentifier"].Visible = false;
dataGridView1.ExpandColumns();
});
}
finally
{
waitForm.Invoke((MethodInvoker)(() => waitForm.Dispose()));
}
watch.Stop();
ElapsedTimeLabel.Invoke((MethodInvoker)(() => ElapsedTimeLabel.Text = watch.Elapsed.ToString("mm\\:ss\\.ff")));
}
private void Example4Button_Click(object sender, EventArgs e)
{
ElapsedTimeLabel.Text = "00:00:00";
ElapsedTimeLabel.Refresh();
var watch = new Stopwatch();
watch.Start();
_customerBindingListView = new SortableBindingList <Customer>(new List <Customer>());
_customersBindingSource.DataSource = _customerBindingListView;
dataGridView1.Visible = false;
PleaseWaitLabel.Refresh();
try
{
_customerBindingListView = new SortableBindingList <Customer>(new List <Customer>());
_customersBindingSource.DataSource = _customerBindingListView;
dataGridView1.DataSource = _customersBindingSource;
foreach (var line in FileReader.ParseFile(_fileNameToReadFrom))
{
var lineParts = line.Result.Split(',');
_customerBindingListView.Add(
new Customer()
{
CustomerIdentifier = Convert.ToInt32(lineParts[0]),
CompanyName = lineParts[1],
ContactName = lineParts[2],
ContactTitle = lineParts[3],
City = lineParts[4],
Country = lineParts[5]
});
}
}
finally
{
dataGridView1.Visible = true;
dataGridView1.ExpandColumns();
watch.Stop();
ElapsedTimeLabel.Invoke((MethodInvoker)(() => ElapsedTimeLabel.Text = watch.Elapsed.ToString("mm\\:ss\\.ff")));
}
}
private async void Example2Button_Click(object sender, EventArgs e)
{
bindingNavigator1.BindingSource = null;
ElapsedTimeLabel.Text = "00:00:00";
ElapsedTimeLabel.Refresh();
var watch = new Stopwatch();
watch.Start();
_customerBindingListView = new SortableBindingList <Customer>(new List <Customer>());
_customersBindingSource.DataSource = _customerBindingListView;
dataGridView1.DataSource = _customersBindingSource;
int index = 0;
foreach (var line in FileReader.ParseFile(_fileNameToReadFrom))
{
var lineParts = line.Result.Split(',');
if (index % _delayIndex == 0)
{
await Task.Delay(1);
}
_customerBindingListView.Add(
new Customer()
{
CustomerIdentifier = Convert.ToInt32(lineParts[0]),
CompanyName = lineParts[1],
ContactName = lineParts[2],
ContactTitle = lineParts[3],
City = lineParts[4],
Country = lineParts[5]
});
index += 10;
}
watch.Stop();
bindingNavigator1.BindingSource = _customersBindingSource;
ElapsedTimeLabel.Invoke((MethodInvoker)(() => ElapsedTimeLabel.Text = watch.Elapsed.ToString("mm\\:ss\\.ff")));
}
private async void Example5AButton_Click(object sender, EventArgs e)
{
ElapsedTimeLabel.Text = "00:00:00";
ElapsedTimeLabel.Refresh();
var watch = new Stopwatch();
watch.Start();
var customers = new List <Customer>();
var results = await FileReader.GetContentAsync(_fileNameToReadFrom);
var lines = results.Split('\n');
foreach (var line in lines)
{
var lineParts = line.Split(',');
customers.Add(new Customer()
{
CustomerIdentifier = Convert.ToInt32(lineParts[0]),
CompanyName = lineParts[1],
ContactName = lineParts[2],
ContactTitle = lineParts[3],
City = lineParts[4],
Country = lineParts[5]
});
}
_customerBindingListView = new SortableBindingList <Customer>(customers.ToList());
_customersBindingSource.DataSource = _customerBindingListView;
dataGridView1.DataSource = _customersBindingSource;
watch.Stop();
ElapsedTimeLabel.Invoke((MethodInvoker)(() => ElapsedTimeLabel.Text = watch.Elapsed.ToString("mm\\:ss\\.ff")));
dataGridView1.RowValidating -= DataGridView1_RowValidating;
dataGridView1.RowValidating += DataGridView1_RowValidating;
RemoveCurrentButton.Enabled = true;
}
private async void Example5Button_Click(object sender, EventArgs e)
{
var timeSpanList = new List <TimeSpan>();
ElapsedTimeLabel.Text = "00:00:00";
ElapsedTimeLabel.Refresh();
var watch = new Stopwatch();
watch.Start();
var results = await FileReader.GetContentAsync(_fileNameToReadFrom);
watch.Stop();
timeSpanList.Add(watch.Elapsed);
//Console.WriteLine($"Time to read file {watch.Elapsed.ToString("mm\\:ss\\.ff")}");
watch.Reset();
watch.Start();
var lines = results.Split('\n');
//Console.WriteLine($"Time to read file {watch.Elapsed.ToString("mm\\:ss\\.ff")}");
timeSpanList.Add(watch.Elapsed);
watch.Reset();
watch.Start();
int index = 0;
var customers = new List <Customer>();
foreach (var line in lines)
{
var lineParts = line.Split(',');
customers.Add(new Customer()
{
CustomerIdentifier = Convert.ToInt32(lineParts[0]),
CompanyName = lineParts[1],
ContactName = lineParts[2],
ContactTitle = lineParts[3],
City = lineParts[4],
Country = lineParts[5]
});
if (index % _delayIndex == 0)
{
await Task.Delay(1);
}
index += 10;
}
timeSpanList.Add(watch.Elapsed);
watch.Reset();
watch.Start();
_customerBindingListView = new SortableBindingList <Customer>(customers.ToList());
_customersBindingSource.DataSource = _customerBindingListView;
dataGridView1.DataSource = _customersBindingSource;
var totalSpan = new TimeSpan(timeSpanList.Sum(r => r.Ticks));
ElapsedTimeLabel.Text = totalSpan.ToString("mm\\:ss\\.ff");
}