WCF 休息 - 没有找到元素错误
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【中文标题】WCF 休息 - 没有找到元素错误【英文标题】：WCF Rest - no elemnt found error 【发布时间】：2013-09-24 11:44:59 【问题描述】：我设计了一个 WCF REST 服务并尝试通过 html 页面中的 JQuery 使用它。当我在创建 WCF 服务的解决方案中添加 html 页面时，我根据需要得到了结果。但是当我在不同的解决方案中创建 HTML 页面时，我开始收到错误，例如找不到元素并且返回的结果为空。
我在服务中放置了一个调试器，我注意到即使消费者 html 页面保存在不同的解决方案中，它仍然会在调用服务时命中 global.asax 文件，但它没有命中任何方法。 我什至放了“crossDomain:true”和“jQuery.support.cors = true;”在用于启用跨域问题的脚本中，以及我也在 Global.asax 文件中进行了更改，但没有用。 请尽快为我提供相同的解决方案。
我将带有配置文件和 DataContracts 的实际代码连同 HTML 代码放在这里：
ICouponService.cs：
[ServiceContract]
public interface ICouponService
[OperationContract]
[WebInvoke(UriTemplate = "/GenerateCoupon",
Method = "POST",
RequestFormat = WebMessageFormat.Json,
ResponseFormat = WebMessageFormat.Json)]
CouponData GenerateCoupon(CouponData objCustomerData);
[OperationContract]
[WebInvoke(UriTemplate = "/UpdateGeneratedCoupon",
Method = "POST",
RequestFormat = WebMessageFormat.Json,
ResponseFormat = WebMessageFormat.Json)]
ResponseMessage UpdateGeneratedCoupon(CouponData objCustomerData);
CouponService.cs：
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
[ServiceBehavior(AddressFilterMode = AddressFilterMode.Any)]
public class CouponService : ICouponService
public CouponData GenerateCoupon(CouponData objCustomerData)
return objCouponData;
public ResponseMessage UpdateGeneratedCoupon(CouponData objCustomerData)
return objResponseMessage;
CouponData.cs：
[DataContract]
public class CouponData
[DataMember(EmitDefaultValue = false)]
public string Email get; set;
[DataMember(EmitDefaultValue = false)]
public string Points get; set;
[DataMember(EmitDefaultValue = false)]
public string ActiveFlag get; set;
[DataMember(EmitDefaultValue = false)]
public string CouponCode get; set;
[DataMember(EmitDefaultValue = false)]
public string RequestID get; set;
[DataMember(EmitDefaultValue = false)]
public string LoyaltyID get; set;
[DataMember(EmitDefaultValue = false)]
public string Result get; set;
[DataMember(EmitDefaultValue = false)]
public string ReturnFlag get; set;
[DataMember(EmitDefaultValue = false)]
public string UserName get; set;
[DataMember(EmitDefaultValue = false)]
public string Password get; set;
ResponseMessage.cs：
[DataContract]
public class ResponseMessage
[DataMember(EmitDefaultValue = false)]
public string Response get; set;
全球.asax： 首先我认为可能有一些 Header 问题，所以我在 Global 文件中添加了相同的内容，如下所示：
protected void Session_Start(object sender, EventArgs e)
string sessionId = Session.SessionID;
protected void Application_BeginRequest(object sender, EventArgs e)
HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
HttpContext.Current.Response.Cache.SetNoStore();
EnableCrossDomainAjaxCall();
private void EnableCrossDomainAjaxCall()
if (!string.IsNullOrEmpty(Request.ServerVariables["HTTP_ORIGIN"]))
HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", Request.ServerVariables["HTTP_ORIGIN"]);
if (!string.IsNullOrEmpty(HttpContext.Current.Request.HttpMethod))
if (HttpContext.Current.Request.HttpMethod == "OPTIONS" || HttpContext.Current.Request.HttpMethod == "POST" || HttpContext.Current.Request.HttpMethod == "GET")
HttpContext.Current.Response.AddHeader("Access-Control-Allow-Methods", "GET, POST");
HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers", "Content-Type, Accept");
HttpContext.Current.Response.AddHeader("Access-Control-Max-Age", "1728000");
//HttpContext.Current.Response.End();
Web.config：
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
</system.web>
<system.serviceModel>
<services>
<service behaviorConfiguration="ServiceBehaviour" name="SAM_STORE_LoyaltyProgram_WCFLibrary.CouponService">
<endpoint address="" behaviorConfiguration="web" binding="webHttpBinding"
contract="SAM_STORE_LoyaltyProgram_WCFLibrary.ICouponService" />
</service>
<service name="SAM_STORE_LoyaltyProgram_WCFServices.qqq">
<endpoint address="" behaviorConfiguration="SAM_STORE_LoyaltyProgram_WCFServices.qqqAspNetAjaxBehavior"
binding="webHttpBinding" contract="SAM_STORE_LoyaltyProgram_WCFServices.qqq" />
</service>
</services>
<behaviors>
<endpointBehaviors>
<behavior name="web">
<webHttp />
</behavior>
<behavior name="SAM_STORE_LoyaltyProgram_WCFServices.qqqAspNetAjaxBehavior">
<enableWebScript />
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="ServiceBehaviour">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
<dataContractSerializer maxItemsInObjectGraph="5000" />
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true"
multipleSiteBindingsEnabled="true" />
<bindings>
<webHttpBinding>
<binding maxBufferSize="5000" maxReceivedMessageSize="5000"
transferMode="Streamed">
<readerQuotas maxDepth="5000" maxStringContentLength="5000"
maxArrayLength="5000" maxBytesPerRead="5000" maxNameTableCharCount="5000" />
<security mode="None" />
</binding>
</webHttpBinding>
</bindings>
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
</configuration>
Index.html（用于调用服务的脚本）：
<script src="js/jquery-1.7.min.js" type="text/javascript"></script>
<script type="text/javascript">
var Type;
var Url;
var Data;
var ContentType;
var DataType;
var ProcessData;
var method;
var eMail;
var points;
var requestId;
var couponCode;
var returnFlag;
var userName;
var password;
//Generic function to call Service
function CallService()
$.ajax(
type: Type,
url: Url,
data: Data,
contentType: ContentType,
dataType: DataType,
//crossDomain:true, --This is not working
processdata: ProcessData,
success: function (msg)
ServiceSucceeded(msg);
,
error: function (msg)
alert("Service Failed");
ServiceFailed(msg);
);
function SetGenerateCouponValues()
eMail = $("#txtEmail").val();
points = $("#txtPoints").val();
requestId = $("#txtRequestId").val();
userName = 'username';
password = 'JEBtJHVu';
function DestroyGenerateCouponValues()
eMail = null;
points = null;
requestId = null;
userName = null;
password = null;
function SetUpdateCouponValues()
couponCode = $("#txtCode").val();
returnFlag = $("#txtFlag").val();
userName = 'username';
password = 'JEBtJHVu';
function DestroyUpdateCouponValues()
couponCode = null;
returnFlag = null;
userName = null;
password = null;
function ServiceFailed(result)
alert('Service call failed: ' + result.status + '' + result.statusText);
Type = null; Url = null; Data = null; ContentType = null; DataType = null; ProcessData = null;
function GenerateCoupon()
SetGenerateCouponValues();
Type = "POST";
Url = "ServiceURL";
Data = ' "Email": "' + eMail + '", "Points": "' + points + '", "UserName": "' + userName + '", "Password": "' + password + '", "RequestID": "' + requestId + '"';
ContentType = "application/json; charset=utf-8";
DataType = "json";
ProcessData = true;
method = "GenerateCoupon";
CallService();
DestroyGenerateCouponValues();
function UpdateGeneratedCoupon()
SetUpdateCouponValues();
Type = "POST";
Url = "ServiceURL";
Data = ' "CouponCode": "' + couponCode + '", "ReturnFlag": "' + returnFlag + '", "UserName": "' + userName + '", "Password": "' + password + '"';
ContentType = "application/json; charset=utf-8";
DataType = "json";
ProcessData = true;
method = "UpdateGeneratedCoupon";
CallService();
DestroyUpdateCouponValues();
function ServiceSucceeded(result)
if (DataType == "json")
if (method == "GenerateCoupon")
var string = "Coupon Code : " + result.CouponCode + "<br/>" + "Points : " + result.Points + "<br/>" + "Result : " + result.Result;
$("#resultCreate").html(string);
$("#lblCouponCode").text(result.CouponCode);
$("#lblPoints").text(result.Points);
$("#lblResult").text(result.Result);
else if (method == "UpdateGeneratedCoupon")
var string = "Response : " + result.Response;
$("#resultDelete").html(string);
$("#lblResponse").text(result.Response);
/*function ServiceFailed(xhr)
alert("FAIL" + xhr.responseText);
if (xhr.responseText)
var err = xhr.responseText;
if (err)
error(err);
else
error( Message: "Unknown server error." )
return;
*/
$(document).ready(
function ()
//jQuery.support.cors = true; --This is not working
$("#btnsubmit").click(function ()
GenerateCoupon();
);
$("#btnUpdateGeneratedCoupon").click(function ()
UpdateGeneratedCoupon();
);
);
</script>
请尽快为我提供相同的解决方案。
【问题讨论】：
此代码在 IIS 上部署时可以在 IE10 和其他浏览器上正常工作，但它仍然会导致 IE9 及以下版本的 IE 出现问题。在 IE 上显示错误 - “访问被拒绝。” 【参考方案1】：尝试启用WCF tracing 和ETW tracing 以查看调用服务操作时服务器端发生的情况。
【讨论】：
我也试过这个，但我没有从日志中得到任何有用的信息，即。日志文件不包含任何错误。 你看到请求进入服务了吗？ 正如我在上面发布的，当部署在 IIS 上时，此代码在 IE10 和其他浏览器上运行良好，但它仍然会导致 IE9 及以下版本的 IE 出现问题。在 IE 上它显示和错误 - “访问被拒绝。”，在 IE9 及以下版本的 IE 中它甚至没有命中服务。【参考方案2】：是调用ServiceSucceeded方法吗？？ 如果调用 ServiceSucceeded 尝试将 $.support.cors = true; 放入 CallService() 启动然后检查它
【讨论】：
是的，是调用ServiceSucceeded方法，我也试过代码$.support.cors = true;但它仍然显示相同的错误，没有找到元素。以上是关于WCF 休息 - 没有找到元素错误的主要内容，如果未能解决你的问题，请参考以下文章