static void Main()
{
WebDataDownloader downloader = new WebDataDownloader();
string[] addresses = { "http://www.msnbc.com", "http://www.yahoo.com",
"http://www.nytimes.com", "http://www.washingtonpost.com",
"http://www.latimes.com", "http://www.newsday.com" };
CancellationTokenSource cts = new CancellationTokenSource();
// Create a UI thread from which to cancel the entire operation
Task.Factory.StartNew(() =>
{
Console.WriteLine("Press c to cancel");
if (Console.ReadKey().KeyChar == 'c')
cts.Cancel();
});
// Using a neutral search term that is sure to get some hits.
Task<string[]> webTask = downloader.GetWordCounts(addresses, "the", cts.Token);
// Do some other work here unless the method has already completed.
if (!webTask.IsCompleted)
{
// Simulate some work.
Thread.SpinWait(5000000);
}
string[] results = null;
try
{
results = webTask.Result;
}
catch (AggregateException e)
{
foreach (var ex in e.InnerExceptions)
{
OperationCanceledException oce = ex as OperationCanceledException;
if (oce != null)
{
if (oce.CancellationToken == cts.Token)
{
Console.WriteLine("Operation canceled by user.");
}
}
else
Console.WriteLine(ex.Message);
}
}
if (results != null)
{
foreach (var item in results)
Console.WriteLine(item);
}
Console.ReadKey();
}
private static void DowloadTest()
{
WebDataDownloader downloader = new WebDataDownloader();
string[] addresses = { "http://www.msnbc.com", "http://www.yahoo.com",
"http://www.nytimes.com", "http://www.washingtonpost.com",
"http://www.latimes.com", "http://www.newsday.com" };
CancellationTokenSource cts = new CancellationTokenSource();
string keyword = "the";
// Create a UI thread from which to cancel the entire operation
Task.Factory.StartNew(() =>
{
Console.WriteLine("Press c to cancel");
while (true)
{
if (Console.ReadLine().ToString().Equals("c", StringComparison.InvariantCultureIgnoreCase))
{
cts.Cancel();
System.Environment.Exit(0);
}
else
{
keyword = Console.ReadLine();
}
}
});
// Using a neutral search term that is sure to get some hits.
Task <string[]> webTask = downloader.GetWordCounts(addresses, keyword, cts.Token);
// Do some other work here unless the method has already completed.
//if (!webTask.IsCompleted)
//{
// // Simulate some work.
// Thread.SpinWait(5000000);
//}
string[] results = null;
try
{
results = webTask.Result;
}
catch (AggregateException e)
{
foreach (var ex in e.InnerExceptions)
{
OperationCanceledException oce = ex as OperationCanceledException;
if (oce != null)
{
if (oce.CancellationToken == cts.Token)
{
Console.WriteLine("Operation canceled by user.");
}
}
else
{
Console.WriteLine(ex.Message);
}
}
}
if (results != null)
{
foreach (var item in results)
{
Console.WriteLine(item);
}
}
Console.ReadKey();
}
