jQuery - 使用 ajax 调用将 JSON 发送到 WCF 服务为空

Posted 2023-04-13

【中文标题】jQuery - 使用 ajax 调用将 JSON 发送到 WCF 服务为空

【英文标题】：jQuery - Sending JSON to WCF Service with ajax call is null

【发布时间】：2017-03-17 00:46:13

【问题描述】：

我刚刚开始学习 WCF 服务并使用 jQuery 对服务进行 ajax 调用：

function CallService() 
    $.ajax(
        type: "POST",
        url: "http://localhost:18091/MainframeDateChange.svc/CallDateSetup",
        data: JSON.stringify(
        "userID": userID,
        "password": password,
        "environment": environment,
        "newDate": newDate,
        "newTime": newTime
    );,
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (msg) 
            ServiceSucceeded(msg);
        ,
        error: ServiceFailed
    );

通过合约传递：

[ServiceContract]
public interface IMainframeDateChange


    [OperationContract]
    [WebInvoke(Method = "POST",
     BodyStyle = WebMessageBodyStyle.Wrapped,
     ResponseFormat = WebMessageFormat.Json,
     RequestFormat = WebMessageFormat.Json)]
    void CallDateSetup(string userID);
    //, string password, string envName, string newDate, string newTime

    [OperationContract]
    [WebInvoke(Method = "OPTIONS", UriTemplate = "*",
        RequestFormat = WebMessageFormat.Json, 
        ResponseFormat = WebMessageFormat.Json)]
    void CallDateSetupOptions(string userID);

这是我的服务 Web.config

<?xml version="1.0"?>
<configuration>
  <appSettings>
    <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5"/>
  </system.web>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="ServiceBehavior">
          <serviceMetadata httpGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="true"/>
        </behavior>
        <behavior>
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="EndpBehavior">
          <webHttp/>
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <services>
      <service behaviorConfiguration="ServiceBehavior" name="MainframeServiceHandler.MainframeDateChange">
        <endpoint address="" binding="webHttpBinding"
            contract="MainframeServiceHandler.IMainframeDateChange" behaviorConfiguration="EndpBehavior"/>
      </service>
    </services>
    <protocolMapping>
      <add binding="basicHttpsBinding" scheme="https" />
    </protocolMapping>
    <serviceHostingEnvironment>
      <serviceActivations>
        <add factory="System.ServiceModel.Activation.WebServiceHostFactory"
             relativeAddress="./MainframeServiceHandler/MainframeDateChange.svc"
             service="MainframeServiceHandler.MainframeDateChange" />
      </serviceActivations>
    </serviceHostingEnvironment>
  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
    <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
        <add name="Access-Control-Allow-Headers" value="Origin, X-Requested-With, Content-Type, Accept,Authorization" />
        <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />
      </customHeaders>
    </httpProtocol>
    <directoryBrowse enabled="true"/>
  </system.webServer>

</configuration>

问题是在进行调用并且 Web 服务开始处理调用后，userID 值为 null。

首先，当 JSON 传递到合同中时，我不确定我的服务期望什么作为输入。我还怀疑我将数据传递到网络合同的方式无法正确处理（使用UriTemplate）。它似乎也只打了第二份合同：

[OperationContract]
[WebInvoke(Method = "OPTIONS", UriTemplate = "*",
    RequestFormat = WebMessageFormat.Json, 
    ResponseFormat = WebMessageFormat.Json)]
void CallDateSetupOptions(string userID);

目前 WCF 服务和调用该服务的 Web 应用程序是分开的，我需要在其他 web.config 中进行任何其他潜在配置吗？也许在<connectionStrings>？

任何帮助将不胜感激，一直坚持这一点。

【参考方案1】：

UriTemplate 唯一标识服务上的操作。您应该这样做 -

[ServiceContract]
public interface IService1


    [OperationContract]
    [WebInvoke(Method = "POST", UriTemplate = "post",
 BodyStyle = WebMessageBodyStyle.Wrapped,
 ResponseFormat = WebMessageFormat.Json,
 RequestFormat = WebMessageFormat.Json)]
    bool CallDateSetup(CompositeType data);

在哪里-

[DataContract]
public class CompositeType

    [DataMember]
    public string userID  get; set; 
    [DataMember]
    public string password  get; set; 
    [DataMember]
    public string envName  get; set; 
    [DataMember]
    public string newDate  get; set; 
    [DataMember]
    public string newTime  get; set; 

样品请求 -

   "data": 
   "userID": "uiag61",
   "password": "password",
   "envName": "environment",
   "newDate": "newDate",
   "newTime": "newTime"
  

【讨论】：

感谢您的回答 :) 虽然在指定要发布的 UriTemplate 或选项时，根据数据传递的方法，它会返回 404。网络中是否有问题。在那种情况下配置？

否则 UriTemplate 为 "*" 它仍然返回 null