C# HttpWebRequest POST方法异常

目前我正在使用下面的方法将xml文件内容发布到extranet网站。我每10秒创建一个新线程来并发发布多个文件

在这种情况下，许多文件都会出现此异常：System.Net.WebException：操作已超时

虽然它抛出了这个异常，但仍然有一些异常文件的内容被发布在网站上

1即使某些文件出现超时异常，请求仍被发布，这是正确的行为吗

2如何处理一些异常文件的内容，而不是其他文件的内容？我如何确保哪些内容没有发布，以便我可以尝试重新发布

欢迎提出其他更好的实施建议

public void SendMessage(XmlDocument doc) {
    var httpWReq = (HttpWebRequest)WebRequest.Create(_extranetRemitService);

    httpWReq.Proxy = WebRequest.GetSystemWebProxy();
    httpWReq.Proxy.Credentials = CredentialCache.DefaultCredentials;
    httpWReq.UseDefaultCredentials = true;
    // encode xml file contents (melFileContents is a string)
    var melMessage = doc.InnerXml;
    byte[] data = Encoding.ASCII.GetBytes(melMessage);
    //post the xml data as text/xml content type
    httpWReq.Method = "POST";
    httpWReq.ContentType = "text/xml;charset=utf-8";
    httpWReq.ReadWriteTimeout = -1;
    httpWReq.KeepAlive = false;
    httpWReq.ContentLength = data.Length;
    using (Stream stream = httpWReq.GetRequestStream())
    {
        stream.Write(data, 0, data.Length);
    }
}

---

谢谢crackhaus和Jim Mischel。以下是工作示例：

public void SendMessage(XmlDocument doc)
    {
        var httpWReq = (HttpWebRequest)WebRequest.Create(_extranetRemitService);
        httpWReq.Proxy = WebRequest.GetSystemWebProxy();
        httpWReq.Proxy.Credentials = CredentialCache.DefaultCredentials;
        httpWReq.UseDefaultCredentials = true;

        // encode xml file contents (melFileContents is a string)
        var melMessage = doc.InnerXml;
        byte[] data = Encoding.ASCII.GetBytes(melMessage);

        //post the xml data as text/xml content type
        httpWReq.Method = "POST";
        httpWReq.ContentType = "text/xml;charset=utf-8";
        httpWReq.ReadWriteTimeout = 10000;
        httpWReq.KeepAlive = false;
        httpWReq.ContentLength = data.Length;
        using (Stream stream = httpWReq.GetRequestStream())
        {
            stream.Write(data, 0, data.Length);
            stream.Close();
        }

        var response = (HttpWebResponse)httpWReq.GetResponse();
        response.Close();


    }

---

您应该尝试使用异步调用。request.BeginGetRequestStreamnew AsyncCallbackGetRequestStreamCallback，请求；还可以尝试增加“Timeout”属性毫秒数。httpWReq.Timeout=10000；这不是一个完整的例子。您从不调用httpWReq.GetResponse，因此您无法知道请求是否发送到服务器，或者服务器是否响应。另外，很可能您不需要Encoding.ASCII.GetBytes，而是需要Encoding.UTF8.GetBytes。