我正在使用一个WPF .net 4.0应用程序。我有一个搜索栏。对于每个搜索令牌,我需要对8个不同的URL进行8个http请求以获取搜索结果。一旦用户停止在搜索栏中输入,我会在400毫秒后向服务器发送8个请求。当搜索6到7个搜索令牌时,结果非常好。但是,在此之后,HttpWebRequest突然无声地停止工作。没有抛出异常,也没有收到响应。我正在使用Windows 7,我已经禁用了防火墙。我不知道后续的http请求在哪里丢失了。
有人能告诉我如何解决这个问题吗?
以下是我的HttpWebRequest调用代码。
有人能告诉我如何解决这个问题吗?
以下是我的HttpWebRequest调用代码。
public static void SendReq(string url)
{
// Create a new HttpWebRequest object.
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.ContentType = "application/x-www-form-urlencoded";
request.Proxy = new WebProxy("192.168.1.1", 8000);
// Set the Method property to 'POST' to post data to the URI.
request.Method = "POST";
// start the asynchronous operation
request.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), request);
}
private static void GetRequestStreamCallback(IAsyncResult asynchronousResult)
{
HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
// End the operation
Stream postStream = request.EndGetRequestStream(asynchronousResult);
string postData = this.PostData;
// Convert the string into a byte array.
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
// Write to the request stream.
postStream.Write(byteArray, 0, byteArray.Length);
postStream.Close();
// Start the asynchronous operation to get the response
request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);
}
private static void GetResponseCallback(IAsyncResult asynchronousResult)
{
HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
// End the operation
using(HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult))
{
using(Stream streamResponse = response.GetResponseStream())
{
using(StreamReader streamRead = new StreamReader(streamResponse))
{
string responseString = streamRead.ReadToEnd();
Debug.WriteLine(responseString);
}
}
}
}
GetRequestStreamCallback
中读取控制台输入是什么意思?难道在发送请求之前真的需要输入一些内容吗? - ClemensGetRequestStreamCallback
中的控制台输入不会阻塞,对吗? - Clemens