从Google获取结果时GetResponseStream()中的问题

Question

string requestUri = string.Format("http://images.google.com/images?q={0}&ndsp={1}&start={2}&filter={3}&safe={4}",query,RESULTS_PER_QUERY.ToString(),(startPosition+i).ToString(), (filterSimilarResults)?"1":"0",safeSearchStr);

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestUri);
string resultPage = string.Empty;
using (HttpWebResponse httpWebResponse = (HttpWebResponse)request.GetResponse())
{
    using (Stream responseStream = httpWebResponse.GetResponseStream())
    {
        using (StreamReader reader = new StreamReader(responseStream))
        {
            resultPage = reader.ReadToEnd();
        }
    }
}

上面是我的代码，下面是问题所在。

responseStream.Length as 'responseStream.Length‘抛出了一个类型为的异常

responseStream.Position as 'responseStream.Position‘抛出了一个类型为的异常

Answer 1

尝试使用WebClient.DownloadData方法，它要简单得多。如果问题仍然存在，我建议使用Fiddler来检查是否进行了调用(以及返回了什么)。