/// <summary>
/// Run basic example with option to cancel
/// </summary>
/// <param name="token">Valid CancellationToken</param>
/// <returns></returns>
public static async Task RunBasicExample(CancellationToken token)
{
await foreach (var item in RangeAsync(1, 90, 99, token))
{
if (token.IsCancellationRequested)
{
token.ThrowIfCancellationRequested();
}
if (item > 100)
{
throw new Exception("Well now");
}
OnIterateEvent?.Invoke(item);
}
}
/// <summary>
///
/// </summary>
/// <param name="originalFile">File to copy</param>
/// <param name="outputFile">File to copy too</param>
/// <param name="delay">Milliseconds to delay to simulate a large file</param>
/// <param name="token">cancellation token to permit cancelling this operation</param>
/// <returns>Success</returns>
/// <remarks>
/// Exception handling is done at client level
/// </remarks>
public static async Task <bool> CopyFileTask(string originalFile, string outputFile, int delay, CancellationToken token)
{
int lineNumber = 0;
using (var inputStream = File.OpenRead(originalFile))
{
using (var inputReader = new StreamReader(inputStream))
{
using (var outputWriter = File.AppendText(outputFile))
{
var currentLine = await inputReader.ReadLineAsync();
await outputWriter.WriteLineAsync(currentLine);
if (delay > 0)
{
await Task.Delay(delay, token);
}
while (null != currentLine)
{
lineNumber += 1;
await outputWriter.WriteLineAsync(currentLine);
currentLine = await inputReader.ReadLineAsync();
OnIterateEvent?.Invoke(lineNumber);
if (token.IsCancellationRequested)
{
token.ThrowIfCancellationRequested();
}
if (delay > 0)
{
await Task.Delay(delay, token);
}
}
}
}
}
return(true);
}