[英]Http Post Get Response Error for Windows Phone 8
我从我的原始帖子( Windows Phone 8的Http Post )重新发布了第二个问题,因为我的主要问题已经得到解答。
这是我在@Hunter McMillen的帮助下更新的代码。我现在正尝试从服务器获取responseCallback。 问题是第二个using语句中的GetResponseCallback => (HttpWebResponse)httpWebRequest.EndGetResponse(GetResponseCallback)
行,它正在显示
An exception of type 'System.Net.WebException' occurred in System.Windows.ni.dll but was not handled in user code
If there is a handler for this exception, the program may be safely continued.
在使用第一个示例之前,发生了此错误。 有谁知道如何解决这个问题?
private static async void HttpPostData(){
string url = "http://www.mytunnel.com/api/purchases";
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.ContentType = "text/plain";
//httpWebRequest.ContentType = "application/x-www-form-urlencoded";
httpWebRequest.AllowWriteStreamBuffering = true;
httpWebRequest.Method = "POST";
//httpWebRequest.ContentLength = jsonAsBytes.Length;
try{
using (var stream = await Task.Factory.FromAsync<Stream>(httpWebRequest.BeginGetRequestStream, httpWebRequest.EndGetRequestStream, null))
{
byte[] jsonAsBytes = Encoding.UTF8.GetBytes("{ \"data\" : \"json\" }");
await stream.WriteAsync(jsonAsBytes, 0, jsonAsBytes.Length);
}
}
catch (Exception e) { Debug.WriteLine(e.Message); }
httpWebRequest.BeginGetResponse(new AsyncCallback(ReadWebRequestCallback), httpWebRequest);
}
private static void ReadWebRequestCallback(IAsyncResult callbackResult)
{
HttpWebRequest myRequest = callbackResult.AsyncState as HttpWebRequest;
try
{
HttpWebResponse response = myRequest.EndGetResponse(callbackResult) as HttpWebResponse;
using (StreamReader sr = new StreamReader(response.GetResponseStream()))
{
String s = sr.ReadToEnd();
System.Windows.Deployment.Current.Dispatcher.BeginInvoke(() => { MessageBox.Show(s); });
}
}
catch (WebException webExcp)
{
System.Windows.Deployment.Current.Dispatcher.BeginInvoke(() => { MessageBox.Show(webExcp.ToString()); });
}
}
我最终改为使用WebClient。 该代码更加简洁,我从原始帖子中提供的示例链接中阅读了底部的注释。 Microsoft的示例表单实际上是从stackoverflow帖子复制的..它不起作用(不信任MS文档)。
这是我的代码和教程链接( http://www.daveamenta.com/2008-05/c-webclient-usage/ ),适用于遇到相同问题的每个人。如果能为您提供帮助,请竖起大拇指。
private void httpPostData()
{
WebClient webClient = new WebClient();
webClient.Headers[HttpRequestHeader.ContentType] = "application/json";
var uri = new Uri("http://www.sample.com/api/purchases", UriKind.Absolute);
webClient.Headers[HttpRequestHeader.ContentLength] = postData.Length.ToString();
webClient.AllowWriteStreamBuffering = true;
webClient.Encoding = System.Text.Encoding.UTF8;
webClient.UploadStringAsync(uri, "POST", postData.ToString());
webClient.UploadStringCompleted += new UploadStringCompletedEventHandler(postComplete);
System.Threading.Thread.Sleep(200);
}
private void postComplete(object sender, UploadStringCompletedEventArgs e)
{
reset.Set();
Response result = JsonConvert.DeserializeObject<Response>(e.Result);
if (result.success == true)
{
DispatchCommandResult(new PluginResult(PluginResult.Status.OK, package_id));
}
}
将方法更改为"GET"
因为我认为您没有将任何数据发布到表单
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