public AsyncTask()
{
url = string.Empty;
isText = false;
receivedBytes = 0;
totalBytes = 0;
bufferRead = new byte[bufferSize];
requestData = new StringBuilder();
asyncTaskState = AsyncTaskState.None;
exception = null;
idleTime = 0f;
retryTime = 0;
}
// Private methods.
/// <summary>
/// Creates an asynchronous state, and executes the method on the thread pool.
/// </summary>
/// <param name="method">The method to execute.</param>
/// <param name="userState">The user state.</param>
private void Execute(AsyncTaskCallback method, object userState)
{
// Create the asynchronous state for the current method.
AsyncState asyncState = new AsyncState(userState);
// Execute the method on the thread pool.
ThreadPool.QueueUserWorkItem((object state) =>
{
// Lock the task.
lock (this.syncTask)
{
// Lock the state.
lock (this.syncState)
{
// Change the task state.
this.taskState = AsyncTaskState.Running;
// Set the current asychronous state.
this.asyncState = asyncState;
}
// Execute the task method.
method(asyncState);
// If the method has been canceled.
if (asyncState.IsCanceled)
{
// Execute the cancel callback method.
asyncState.CancelCallback();
}
// Lock the state.
lock (this.syncState)
{
// Change the task state.
this.taskState = AsyncTaskState.Ready;
// Set the current asychronous state to null.
this.asyncState = null;
// Signal the completion of the asynchronous operation.
asyncState.Complete();
}
// Dispose of the asynchronous state.
asyncState.Dispose();
}
});
}