post数据时发生417错误，请问如何处理,Expectation Failed

[lonelydreamsym]

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
byte[] requestBytes = System.Text.Encoding.ASCII.GetBytes(post);
req.Method = "POST";
req.CookieContainer = cookie;
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = requestBytes.Length;
Stream requestStream = req.GetRequestStream();
requestStream.Write(requestBytes,0,requestBytes.Length);
requestStream.Close();

HttpWebResponse res = (HttpWebResponse)req.GetResponse();

res.Cookies = cookie.GetCookies(req.RequestUri);
StreamReader sr = new StreamReader(res.GetResponseStream(), System.Text.Encoding.Default);
strResult = sr.ReadToEnd();
sr.Close();
res.Close();
向服务器提交数据时发生：417 Expectation Failed,请问如何处理？？

[jinpeng_dotnet]

没有见过这样的问题，帮楼主顶下！

[flyin2006isdie]

up

[我爱程序]

桑，你看看这个http://my.donews.com/buffalo319/category/http%E5%8D%8F%E8%AE%AE/，里面有讲解

[lonelydreamsym]

小样,来点实际的,不要偷懒

[wdzr_826]

座下来学习

[lonelydreamsym]

自己解决了

[wfnice12]

怎么解决的啊,请答复一下啊,我忙了两天了就是没有找的解决办法

我的是webservice 调用,对方使用了DNS转发,在别的服务器上就好用.请高人指点...

[leehom0754]

07年的贴阿！！！ 我现在也遇到相同的问题.

[roadblue]

在代码的最开始加入如下一句：
System.Net.ServicePointManager.Expect100Continue = false;


或在配置文件中加入（示例代码中的粗体文字）：

<?xml version=”1.0″ encoding=”utf-8″ ?>
<configuration>
<system.net>
<settings>
<servicePointManager expect100Continue=”false”/>
</settings>
</system.net>
</configuration>