/// <summary>
/// Downloads the data.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="httpMethod">The HTTP method.</param>
/// <param name="requestData">The request data.</param>
/// <param name="requestEncoding">The request encoding.</param>
/// <param name="callback">The callback.</param>
/// <param name="userState">State of the user.</param>
/// <returns></returns>
/// <remarks></remarks>
public static AsyncResult DownloadDataAsync(string url, HttpMethod httpMethod, string requestData,
Encoding requestEncoding, AsyncDataCallback callback,
object userState)
{
if (httpMethod == HttpMethod.POST)
{
return(DownloadDataAsync(new Uri(url), httpMethod, requestEncoding.GetBytes(requestData), callback,
userState));
}
if (!url.Contains("?") && !string.IsNullOrEmpty(requestData))
{
url = url + "?" + HttpUtility.ParseQueryString(requestData, requestEncoding);
}
else if (url.Contains("?") && !string.IsNullOrEmpty(requestData))
{
url = url + "&" + HttpUtility.ParseQueryString(requestData, requestEncoding);
}
return(DownloadDataAsync(new Uri(url), httpMethod, new byte[] {}, callback, userState));
}
/// <summary>
/// Downloads the data.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="httpMethod">The HTTP method.</param>
/// <param name="requestData">The request data.</param>
/// <param name="callback">The callback.</param>
/// <param name="userState">State of the user.</param>
/// <returns></returns>
/// <remarks></remarks>
public static AsyncResult DownloadDataAsync(Uri url, HttpMethod httpMethod, byte[] requestData,
AsyncDataCallback callback, object userState)
{
var web = new WebClient();
web.UploadDataCompleted += WebUploadDataCompleted;
web.DownloadDataCompleted += WebDownloadDataCompleted;
var wrap = new Wrap(callback, userState);
web.Headers.Add("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; BOIE9;ZHCN)");
if (httpMethod == HttpMethod.POST)
{
web.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
web.UploadDataAsync(url, "POST", requestData, wrap);
}
else
{
web.DownloadDataAsync(url, wrap);
}
return(new AsyncResult(web));
}
public Wrap(AsyncDataCallback callback, object userState)
{
Callback = callback;
UserState = userState;
}
