/// <summary>
/// Asynchronously downloads a string from the specified url
/// </summary>
/// <param name="url"></param>
/// <param name="callback">A <see cref="DownloadXmlCompletedCallback"/> to be invoked when the request is completed</param>
/// <param name="userState">A state object to be returned to the callback</param>
/// <returns></returns>
public object DownloadStringAsync(string url, DownloadStringCompletedCallback callback, object userState)
{
string urlValidationError;
if (!IsValidURL(url, out urlValidationError))
throw new ArgumentException(urlValidationError);
StringRequestAsyncState state = new StringRequestAsyncState(callback, DownloadStringAsyncCompleted, userState);
HttpWebServiceRequest request = GetRequest();
request.GetResponseAsync(url, new MemoryStream(), STRING_ACCEPT, null, state);
return request;
}
/// <summary>
/// Asynchronously downloads a string from the specified url
/// </summary>
/// <param name="url"></param>
/// <param name="callback">A <see cref="DownloadXmlCompletedCallback"/> to be invoked when the request is completed</param>
/// <param name="userState">A state object to be returned to the callback</param>
/// <returns></returns>
public object DownloadStringAsync(string url, DownloadStringCompletedCallback callback, object userState)
{
string urlValidationError;
if (!IsValidURL(url, out urlValidationError))
{
throw new ArgumentException(urlValidationError);
}
StringRequestAsyncState state = new StringRequestAsyncState(callback, DownloadStringAsyncCompleted, userState);
HttpWebServiceRequest request = GetRequest();
request.GetResponseAsync(url, new MemoryStream(), STRING_ACCEPT, null, state);
return(request);
}
public StringRequestAsyncState(DownloadStringCompletedCallback callback, WebRequestAsyncCallback webRequestCallback, object userState)
: base(webRequestCallback)
{
_downloadStringCompleted = callback;
_userState = userState;
}
public StringRequestAsyncState(DownloadStringCompletedCallback callback, WebRequestAsyncCallback webRequestCallback, object userState)
: base(webRequestCallback)
{
_downloadStringCompleted = callback;
_userState = userState;
}
public void DownloadStringAsync(Uri uri, DownloadStringCompletedCallback callback, object state)
{
this.webClient.DownloadStringAsync(uri, new DownloadStringCompletedState {Callback = callback, State = state});
}
public void DownloadStringAsync(string url, DownloadStringCompletedCallback callback, object state)
{
this.DownloadStringAsync(new Uri(url), callback, state);
}
