httpwebrequest怎么发post请求呀？
我在网上看了看post请求的例子，都是发的字符串的，所以不知道该怎么写。
private void button1_Click(object sender, RoutedEventArgs e)
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{
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HttpWebRequest req = HttpWebRequest.Create(new Uri("http://localhost:51313/Server/test1.ashx")) as HttpWebRequest;
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req.Method = "POST";
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req.ContentType = "application/x-www-form-urlencoded";
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req.BeginGetRequestStream(HttpPostCallback, req);
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}
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private void HttpPostCallback(IAsyncResult result)
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{
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var req = result.AsyncState as HttpWebRequest;
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List<string> greeting = App.DishnosInfo.Dishnos;//这里是我要传的App.DishnosInfo.Dishnos，类型是List<sring>
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byte[] greetbytes = Encoding.UTF8.GetBytes(greeting);//这里不知道该怎么写了，这样写是不对的
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using (var requestStream = req.EndGetRequestStream(result))
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{
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requestStream.Write(greetbytes, 0, greetbytes.Length);
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requestStream.Close();
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}
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req.BeginGetResponse(HttpGetResponseCallback, req);
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}
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private void HttpGetResponseCallback(IAsyncResult result)
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{
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var req = result.AsyncState as HttpWebRequest;
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var resp = req.EndGetResponse(result);
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var strm = resp.GetResponseStream();
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var reader = new StreamReader(strm);
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this.Dispatcher.BeginInvoke(() =>
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{
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textBlock1.Text = reader.ReadToEnd();
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});
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}
