/// <summary>
/// GET数据
/// </summary>
/// <param name="requestUrl"></param>
/// <param name="parameters"></param>
/// <param name="callback"></param>
protected virtual void GetData(string requestUrl, Parameters parameters, Action<string> callback)
{
this.LastError = null;
this.AddOAuthParameter("GET", requestUrl, parameters);
var request = new AsyncHttpRequest(requestUrl, this.OAuth.Charset) { Parameters = parameters };
request.Get(EndGetResponseData, callback);
}