.net 从WindowsMobile6.5Compact框架调用RESTfulWebService

我正在尝试从windows mobile 6.5 compact framework客户端调用服务。这会导致异常“无法从传输连接读取数据”

我使用的模拟器是Windows mobile 6 professional emulator。dotnetframework3。仿真器连接到internet。我可以从互联网上打开网页。如果创建一个C#Windows控制台应用程序，同样的代码运行良好。请导游

        WebRequest Webrequest;
        HttpWebResponse response=null;

        Webrequest = WebRequest.Create("http://api.geonames.org/postalCodeSearchJSON?postalcode=9011&maxRows=10&username=demo");

        Webrequest.Method = "GET";
        Webrequest.ContentType = "html/xml";
        try
        {
            response = (HttpWebResponse)Webrequest.GetResponse();
        }catch(Exception exc){
            ShowErrorMessage("Ex : " + exc.Message);

            return;
        }

        Stream streamResponse = response.GetResponseStream();
        StreamReader streamReader = new StreamReader(streamResponse);
        string responseStr = streamReader.ReadToEnd();

---

我不知道你的代码到底出了什么问题。在发出web请求之前，可能必须设置一些属性。下面是我用来从web服务获取时区信息的一个片段：

    /// <summary>
    /// This will call the webservice asynchronousely
    /// the call will immediately return
    /// The answer on the request is published to all event subscribers
    /// </summary>
    /// <param name="lat">decimal input for geographic Latitude</param>
    /// <param name="lng">decimal input for geographic Longitude</param>
    public void startRequest(string lat, string lng)
    {
        //tzInfos pTZinfos = new tzInfos();
        string myURL = @"http://ws.geonames.org/" + _webMethodName;
        //HttpWebRequest webRequest = (HttpWebRequest)HttpWebRequest.Create(myURL);
        //HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
        //string wsdl = "";
        _webServiceURI = myURL;
        try
        {
            _httpRequest = (HttpWebRequest)HttpWebRequest.Create(this._webServiceURI + "?lat=" + lat + "&lng=" + lng); // "?WSDL");
            _httpRequest.Method = "POST";
            _httpRequest.KeepAlive = false;
            _httpRequest.ContentType = "application/x-www-form-urlencoded";
            //httpRequest.ContentLength = requestData.Length;
            _httpRequest.Timeout = 30000;

            //async call
            IAsyncResult myAsycnCall = this._httpRequest.BeginGetResponse(new AsyncCallback(this.ResponseReceivedHandler), null);                
        }
        catch (WebException wx)
        {
            System.Diagnostics.Debug.WriteLine("Exception: " + wx.Message);
        }
        catch (Exception wx)
        {
            System.Diagnostics.Debug.WriteLine("Exception: " + wx.Message);
        }
    }
    /// <summary>
    /// This is the async method for the response to be get from the web service
    /// </summary>
    /// <param name="result"></param>
    private void ResponseReceivedHandler(IAsyncResult result)
    {
        string wsdl = "";
        geonamesTZfields pTZinfos = new geonamesTZfields();
        geonamesEventArgs tArg = new geonamesEventArgs();
        try
        {
            HttpWebResponse response = (HttpWebResponse)this._httpRequest.EndGetResponse(result);

            System.IO.Stream streamResponse = response.GetResponseStream();
            System.IO.StreamReader streamRead = new System.IO.StreamReader(streamResponse);
            wsdl = streamRead.ReadToEnd();
            System.Diagnostics.Debug.WriteLine("Response: " + wsdl);

            // Close the stream object
            streamResponse.Close();
            streamRead.Close();

            // Release the HttpWebResponse
            response.Close();
            if (wsdl.Length > 0)
            {
                StringBuilder sb = new StringBuilder(wsdl);
                pTZinfos.strCountryCode = xml_helper.xml_helper.getStrSetting(sb, "countryCode");
                pTZinfos.strCountryName = xml_helper.xml_helper.getStrSetting(sb, "countryName");
                pTZinfos.strTimezoneID = xml_helper.xml_helper.getStrSetting(sb, "timezoneId");
                pTZinfos.gmtOffset = xml_helper.xml_helper.getDecimalSetting(sb, "gmtOffset");
                pTZinfos.rawOffset = xml_helper.xml_helper.getDecimalSetting(sb, "rawOffset");
                pTZinfos.dstOffset = xml_helper.xml_helper.getDecimalSetting(sb, "dstOffset");
                pTZinfos.tzTime = xml_helper.xml_helper.getDateTimeSetting(sb, "time");
            }
            _tzFields = pTZinfos;
            //fire the event
            tArg.m_myEventArgumentdata = pTZinfos;
            tArg.m_myEventArgumentdata.DataIsValid = true;
            tArg.m_myEventArgumentdata.strLastError = "no error";
        }
        catch (WebException wx)
        {
            tArg.m_myEventArgumentdata.DataIsValid = false;
            tArg.m_myEventArgumentdata.strLastError = wx.Message;
        }
        catch (Exception ex)
        {
            tArg.m_myEventArgumentdata.DataIsValid = false;
            tArg.m_myEventArgumentdata.strLastError = ex.Message;
        }
        finally
        {
            this.onDataReceived(tArg); //notify all subscribers of new data arrived
        }
    }

//
///这将异步调用webservice
///电话将立即返回
///请求的答案将发布到所有事件订阅者
/// 
///地理纬度的十进制输入
///地理经度的十进制输入
公共无效startRequest（字符串lat、字符串lng）
{
//tzInfos pTZinfos=新的tzInfos（）；
字符串myURL=@“http://ws.geonames.org/“+_webMethodName；
//HttpWebRequest webRequest=（HttpWebRequest）HttpWebRequest.Create（myURL）；
//HttpWebResponse webResponse=（HttpWebResponse）webRequest.GetResponse（）；
//字符串wsdl=“”；
_webServiceURI=myURL；
尝试
{
_httpRequest=（HttpWebRequest）HttpWebRequest.Create（this._webServiceURI+“？lat=“+lat+”&lng=“+lng”）；/“？WSDL”）；
_httpRequest.Method=“POST”；
_httpRequest.KeepAlive=false；
_httpRequest.ContentType=“application/x-www-form-urlencoded”；
//httpRequest.ContentLength=requestData.Length；
_httpRequest.Timeout=30000；
//异步调用
IAsyncResult MyAsycnCCall=this.\u httpRequest.BeginGetResponse（新的AsyncCallback（this.ResponseReceivedHandler）），null；
}
捕获（WebException wx）
{
System.Diagnostics.Debug.WriteLine（“异常：+wx.Message”）；
}
捕获（异常wx）
{
System.Diagnostics.Debug.WriteLine（“异常：+wx.Message”）；
}
}
/// 
///这是从web服务获取响应的异步方法
/// 
/// 
私有void ResponseReceivedHandler（IAsyncResult结果）
{
字符串wsdl=“”；
geonamesTZfields pTZinfos=新的geonamesTZfields（）；
geonamesEventArgs target=新的geonamesEventArgs（）；
尝试
{
HttpWebResponse=（HttpWebResponse）this.\u httpRequest.EndGetResponse（结果）；
System.IO.streamResponse=response.GetResponseStream（）；
System.IO.StreamReader streamRead=新的System.IO.StreamReader（streamResponse）；
wsdl=streamRead.ReadToEnd（）；
System.Diagnostics.Debug.WriteLine（“响应：+wsdl”）；
//关闭流对象
streamResponse.Close（）；
streamRead.Close（）；
//发布HttpWebResponse
response.Close（）；
如果（wsdl.Length>0）
{
StringBuilder sb=新的StringBuilder（wsdl）；
pTZinfos.strCountryCode=xml_helper.xml_helper.getstrset（sb，“国家代码”）；
pTZinfos.strCountryName=xml_helper.xml_helper.getStrSetting（sb，“countryName”）；
pTZinfos.strTimezoneID=xml_helper.xml_helper.getstrset（sb，“timezoneId”）；
pTZinfos.gmtOffset=xml_helper.xml_helper.getDecimalSetting（sb，“gmtOffset”）；
pTZinfos.rawOffset=xml_helper.xml_helper.getDecimalSetting（sb，“rawOffset”）；
pTZinfos.dstOffset=xml_helper.xml_helper.getDecimalSetting（sb，“dstOffset”）；
pTZinfos.tzTime=xml_helper.xml_helper.getDateTimeSetting（sb，“时间”）；
}
_tzFields=pTZinfos；
//解雇事件
target.m_myEventArgumentdata=pTZinfos；
target.m_myEventArgumentdata.DataIsValid=true；
target.m_myEventArgumentdata.strLastError=“无错误”；
}
捕获（WebException wx）
{
target.m_myEventArgumentdata.DataIsValid=false；
target.m_myEventArgumentdata.strLastError=wx.Message；
}
捕获（例外情况除外）
{
target.m_myEventArgumentdata.DataIsValid=false；
target.m_myEventArgumentdata.strLastError=例如消息；
}
最后
{
this.onDataReceived（target）；//通知所有订阅服务器新数据已到达
}
}

你看，我明确地设置了一些属性： _httpRequest.Method=“POST”； _httpRequest.KeepAlive=false； _httpRequest.ContentType=“application/x-www-form-urlencoded”； //httpRequest.ContentLength=requestData.Length； _httpRequest.Timeout=30000； 完整代码可在我的文章中找到：。您可以使用它，更改web请求并使用异步调用

您也可以尝试在设备上的Internet Explorer Mobile中简单地打开网页。您应将答案回复为：

{“postalCodes”：[{“adminCode3”：“3203”，“adminName2”：“Wahlkreis St.Gallen”，“adminName3”：“St.Gallen”，“adminCode2”：“1721”，“adminCode1”：“SG”，“postalCode”：“9011”，“countryCode”：“CH”，“lng”：9.399845287638328，“地名”：“St.Gallen”，“lat”：47.414775553450646，“adminName1”：“Kanton St.Gallen”}，“adminCode1”：“GS”，“postalCode”：“9011”，“countryCode”：“HU”，“lng”：17.781944437499998，“地名”：“Győr”，“lat”：47.60763890000005，“adminName1”：“Győr-Moson-Sopron”}，{“adminName2”：“Tromsø”，“adminCode2”：“1902”，“adminCode1”：“19”，“postalCode”：“9011”，“countryCode”：“NO”，“lng”：18.95508，“地名”：“Tromsø”，“ISO3166-2”：“10”，“lat”：69.6489，“adminName1”：“Troms”}，“postalCode”：“L-9011”，“countryCode”，“地名”：“Ettelbruck”，“lat”：49.8475}，{“adminCode1”：“Z”，“postalCode”：”

class ServiceConnection
{
    public string Url = "";

    private string postXml;

    public delegate void OnServerEndResponse(string response, int statusCode);
    public event OnServerEndResponse OnEndResponse;
    public ServiceConnection(string serviceName, string userName, string pwd)


    public void SendRequest(string requestXml)
    {
        postXml = requestXml;
        StartWebService();
    }

    public void StartWebService()
    {
        WebRequest request = WebRequest.Create(Url);
        request.Method = "GET";
        byte[] auth = Encoding.UTF8.GetBytes(UserName + ":" + Pwd);
        request.Headers["Authorization"] = "Basic " + System.Convert.ToBase64String(auth);
        request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);
    }

    void GetResponseCallback(IAsyncResult asynchronousResult)
    {
        HttpWebResponse response = null;
        HttpWebRequest webRequest = null;

        try
        {
            webRequest = (HttpWebRequest)asynchronousResult.AsyncState;
            response = (HttpWebResponse)webRequest.EndGetResponse(asynchronousResult);
            Stream streamResponse = response.GetResponseStream();
            StreamReader streamReader = new StreamReader(streamResponse);
            StringBuilder sb = new StringBuilder();
            sb.Append(streamReader.ReadToEnd());
            //string serverResponse = streamReader.ReadToEnd();
            streamResponse.Close();
            streamReader.Close();
            response.Close();


            OnEndResponse(sb.ToString(), Convert.ToInt32(response.StatusCode));
        }
        catch (Exception ex)
        {
            if (ex.Message == "The remote server returned an error: (401) Unauthorized.")
                OnEndResponse(ex.Message, 401);
            else if (ex.Message == "Unable to connect to the remote server")
                OnEndResponse(ex.Message, 4);
            else if (ex.Message == "Could not establish connection to network.")
                OnEndResponse(ex.Message, 10000);
            else
                OnEndResponse("Error in network", 10001);
        }
    }
}