获取有关 $http.post 请求的错误消息答案

【问题标题】：get error message on $http.post request获取有关 $http.post 请求的错误消息
【发布时间】：2015-07-27 14:14:24
【问题描述】：

我收到此错误消息： '对象引用未设置为对象的实例。

服务端：

[OperationContract]
[WebInvoke(UriTemplate = "user_login/", Method = "POST", ResponseFormat = WebMessageFormat.Json)]
UserBase UserLogin(UserBase value);

public UserBase UserLogin(UserBase value)
{
    UserLogic UserLg = new UserLogic();
    value = UserLg.GetUser(value);
    return value;
}

客户端：

var DTO = {
              user_email: "v@prova.it",
              user_pass: "v"
          }

          var deferred = $q.defer();
          $http.post(constants().user_login, DTO
               )
                  .success(function (d) {
                      data = d;
                      $timeout(function () {
                          $rootScope.$broadcast('userLoggedIn');
                      });
                      deferred.resolve(d);
                  })
                  .error(function(data, status, headers, config) {

                  });

在本地主机中一切正常。但是在我将项目上传到外部服务器中的 IIS 之后，我得到了下一个错误：

那里，我打开提琴手后没有其他可看的了。我检查了服务器日志并没有发现有趣的东西...... 请帮忙。

回复：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <title>Request Error</title>
    <style>BODY { color: #000000; background-color: white; font-family: Verdana; margin-left: 0px; margin-top: 0px; } #content { margin-left: 30px; font-size: .70em; padding-bottom: 2em; } A:link { color: #336699; font-weight: bold; text-decoration: underline; } A:visited { color: #6699cc; font-weight: bold; text-decoration: underline; } A:active { color: #336699; font-weight: bold; text-decoration: underline; } .heading1 { background-color: #003366; border-bottom: #336699 6px solid; color: #ffffff; font-family: Tahoma; font-size: 26px; font-weight: normal;margin: 0em 0em 10px -20px; padding-bottom: 8px; padding-left: 30px;padding-top: 16px;} pre { font-size:small; background-color: #e5e5cc; padding: 5px; font-family: Courier New; margin-top: 0px; border: 1px #f0f0e0 solid; white-space: pre-wrap; white-space: -pre-wrap; word-wrap: break-word; } table { border-collapse: collapse; border-spacing: 0px; font-family: Verdana;} table th { border-right: 2px white solid; border-bottom: 2px white solid; font-weight: bold; background-color: #cecf9c;} table td { border-right: 2px white solid; border-bottom: 2px white solid; background-color: #e5e5cc;}</style>
  </head>
  <body>
    <div id="content">
      <p class="heading1">Request Error</p>
      <p>The server encountered an error processing the request. The exception message is 'Object reference not set to an instance of an object.'. See server logs for more details. The exception stack trace is: </p>
      <p>   at api.UserLogin(UserBase value)
   at SyncInvokeUserLogin(Object , Object[] , Object[] )
   at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]&amp; outputs)
   at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc&amp; rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc&amp; rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage41(MessageRpc&amp; rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc&amp; rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc&amp; rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3(MessageRpc&amp; rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc&amp; rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage11(MessageRpc&amp; rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc&amp; rpc)

在 System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)

【问题讨论】：

标签： asp.net ajax angularjs web-services iis-6

【解决方案1】：

我发现了问题实际上这是BL中的错误。

【讨论】：