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我有一些問題,我的WebRequest ...的WebRequest的GetResponse無效鏈接程序掛起
時,我有一個無效的網址,我的程序掛起:/ 我認爲它是與GetResponse
,並在互聯網上閱讀我必須使用BeginGetResponse
(異步)?
我嘗試了各種代碼異步,但沒有工作...
我有什麼(無效網址掛起):
WebRequest request;
request = WebRequest.Create(url);
WebResponse webResponse = request.GetResponse();
Stream ReceiveStream = webResponse.GetResponseStream();
Encoding encode = System.Text.Encoding.GetEncoding("utf-8");
StreamReader readStream = new StreamReader(ReceiveStream, encode);
reader = new XmlTextReader(readStream);
String[] login = new String[1];
reader.Read();
reader.ReadStartElement("response");
reader.ReadStartElement("item");
login[0] = reader.ReadString();
reader.ReadEndElement();
reader.ReadEndElement();
reader.Close();
我的嘗試:
private HttpWebResponse response;
private void FinishWebRequest(IAsyncResult result)
{
response = (result.AsyncState as HttpWebRequest).EndGetResponse(result) as HttpWebResponse;
}
public void Read()
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.BeginGetResponse(new AsyncCallback(FinishWebRequest), request);
Stream ReceiveStream = response.GetResponseStream();
Encoding encode = System.Text.Encoding.GetEncoding("utf-8");
StreamReader readStream = new StreamReader(ReceiveStream, encode);
reader = new XmlTextReader(readStream);
但是在這裏我得到了一個InvalidOperation
異常(即使有一個有效/已存在的url)。 我沒有看到/得到它。
試圖執行:/不工作。我必須將StreamReader(鏈接)放在後面的「讀者」?此外,我不明白postData ... – keno
首先,你需要知道你是否做http post或get? –
感謝您的回覆。我做了一個http帖子! :-) – keno