Soap 抛出 java.io.IOException：HTTP 请求失败，HTTP 状态：500

实际上我用这个代码来访问这个网络服务华氏度到摄氏度方法，我得到了正确的响应，但是当我尝试访问我的网络服务时得到

java.io.IOException：HTTP 请求失败，HTTP 状态：500

错误，它指向transport.call(SOAP_ACTION, envelope);

SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);                     
//Use this to add parameters                              
request.addProperty("username",usr);
request.addProperty("password",pass);
request.addProperty("backOfficePartnerId",id);

//Declare the version of the SOAP request
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER10);

envelope.setOutputSoapObject(request);

envelope.dotNet = true;

try {
    HttpTransportSE transport = new HttpTransportSE(URL);

    Log.i("bodyout", "" + envelope.bodyOut.toString());

    transport.call(SOAP_ACTION, envelope);      

    // Get the SoapResult from the envelope body.
    SoapObject result = (SoapObject)envelope.bodyIn;
    System.out.println("result IN F TO C::"+result);
}catch(Exception e){
    e.printStackTrace();
}

直到这里我才得到正确的答复。我调试并检查了发送正文的值是否正确，并且对我来说，正文为空。

HTTP Status: 500 是一个内部服务器错误，它可能与您的 .NET 服务器端编码有关。