private void ReadCallBack(IAsyncResult asyncResult)
{
if (this.IsCancled)
{
this.ReleaseSource();
return;
}
try
{
//RequestState myRequestState = (RequestState)asyncResult.AsyncState;
Stream responseStream = myRequestState.streamResponse;
int read = responseStream.EndRead(asyncResult);
// Read the HTML page and then print it to the console.
if (read > 0)
{
//string contentType = myRequestState.response.ContentType;
//string encodeName = contentType.Substring(contentType.IndexOf("charset") + 8);
//Encoding ecd = Encoding.GetEncoding(encodeName);
//myRequestState.requestData.Append(ecd.GetString(myRequestState.BufferRead, 0, read));
myRequestState.requestData.Append(Encoding.UTF8.GetString(myRequestState.BufferRead, 0, read));
IAsyncResult asynchronousResult = responseStream.BeginRead(myRequestState.BufferRead, 0, BUFFER_SIZE, new AsyncCallback(ReadCallBack), myRequestState);
return;
}
else
{
// 数据从网络上读取完毕,此时需要完成两个工作：
// 1. 检查数据中是否有自定义的异常信息
// 2.如果没有异常信息，调用完成事件
string str = myRequestState.requestData.ToString();
if (myErrorParser != null)
{
if (myErrorParser.HasError(str))
{
HttpException he = new HttpException();
he.Message = myErrorParser.GetErrorMessage(str);
this.RaiseException(he);
//if (this.AcceptException != null)
// this.AcceptException(he);
}
else
this.RaiseEvents();
}
else
RaiseEvents();
}
}
#region 异常处理
catch (Exception e)
{
this.RaiseException(e);
//if (this.AcceptException != null)
//{
// HttpException he = new HttpException();
// he.Message = e.Message;
// this.AcceptException(he);
//}
}
#endregion
ReleaseSource();
}
void RaiseException(Exception e)
{
if (this.AcceptException != null)
{
HttpException he = new HttpException();
he.Message = e.Message;
//this.AcceptException(he);
}
}