WCF在jquery ajax调用上返回Bad Request

Question

我有一个带有一个GET和一个POST方法的WCF服务。 GET运作良好。

前端是一个简单的HTML页面，它使用jquery ajax调用WCF的GET和POST方法。

问题是我得到了错误的请求回复。我已经阅读了所有的相关帖子，我认为一切都井井有条，据我所知。

来源：

我的合同：

[OperationContract]
        [WebGet(UriTemplate = "schedule?week={week}",
                ResponseFormat = WebMessageFormat.Json,
                BodyStyle = WebMessageBodyStyle.Bare)]
        [Description("Return the food schedule; specify the dates to include.")]
        WeeklySchedule GetSchedule(int week);

        [OperationContract]
        [WebInvoke(UriTemplate="writeweek", Method = "POST", 
                    RequestFormat=WebMessageFormat.Json,
                    ResponseFormat=WebMessageFormat.Json,
                    BodyStyle=WebMessageBodyStyle.Bare)]
        [Description("Write or Update a week schedule via json data with POST")]
        int WriteWeek(string jsonwk);

我有一个单独的数据访问层，可以在DB中进行写入/读取，并且工作正常。

关于ajax调用的页面来源：

    function ajaxGetWeek(wk)
    {
        $.ajax({
            cache: false,
            type: "GET",
            processData: false,
            url: 'http://appsrv01/food/svc/foodland.svc/schedule?week='+ wk,
            dataType: "json",
            success: function(data) {
                    GetWeekSucceeded(data);
            },
            error: function (xhr,status,error) {
                alert(error);
            }
        });

这很好用，它返回json格式，我能够以我的形式解析它。

POST ajax调用返回错误请求：

function SubmitFood() {
        var features = new Object();    // Create empty javascript object
        features["weeknumber"] = currentWeek;
        $("#TheForm textarea").each(function() {           // Iterate over inputs
            features[$(this).attr("name")] = $(this).val();  // Add each to features object
        });         
        var jsontxt = JSON.stringify(features);
        $.ajax({
            type: "POST",
            url: 'http://appsrv01/food/svc/foodland.svc/writeweek',
            data: jsontxt,
            dataType: "json",
            contentType: "application/json; charset=utf-8",
            success: function(postresult) {
                    WriteWeekSucceeded(postresult);
            },
            error: function (xhr,status,error) {
                alert(error);
            }
        });

    }

以上回复如下：

{"weeknumber":24,"DishMon":"sdfadsf","DishTue":"asdfasd","DishWed":"fasdfa","DishThu":"sdfasdfas","DishFri":"dfasdf"}

我已经在我的VS解决方案中添加了断点，但它甚至可以调用该方法。

我的app.config：

<?xml version="1.0"?>
<configuration>

  <system.web>
    <compilation debug="true"/>
  </system.web>
  <!-- When deploying the service library project, the content of the config file must be added to the host's 
  app.config file. System.Configuration does not support config files for libraries. -->
  <system.serviceModel>
    <services>
      <service name="FoodLandService.FoodLandService">
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:6969/FoodLand"/>
          </baseAddresses>
        </host>
        <endpoint address="" 
                  binding="webHttpBinding" 
                  contract="ContractsClass.IFoodLandService" 
                  behaviorConfiguration="Web"  />
        <endpoint address="mex" 
                  binding="mexHttpBinding" 
                  contract="IMetadataExchange"/>
      </service>
    </services>
    <behaviors>
      <endpointBehaviors>
        <behavior name="Web">
          <webHttp helpEnabled="true"/>
        </behavior>
      </endpointBehaviors>
      <serviceBehaviors>
        <behavior>
          <serviceMetadata httpGetEnabled="True" />
          <serviceDebug includeExceptionDetailInFaults="False"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>

的web.config：

<?xml version="1.0"?>
<configuration>

  <system.web>
    <compilation debug="false" targetFramework="4.0" />
    <customErrors mode="Off"/>
  </system.web>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>

</configuration>

和foodland.svc：

<%@ ServiceHost Service="FoodLandService.FoodLandService"
     Factory="System.ServiceModel.Activation.WebServiceHostFactory" %>

我的服务来源：

public class FoodLandService : ContractsClass.IFoodLandService
{
    public WeeklySchedule GetSchedule(int week)
    {
        FoodClassDB fd = new FoodClassDB();
        return fd.ReadWeekDB(week);
    }

    public int WriteWeek(string jsonwk)
    {
        FoodClassDB fd = new FoodClassDB();
        return fd.WriteWeekDB(jsonwk);
    }
}

json编码正常，我无法找到错误的原因。