我使用以下代码来调用wcf服务.如果我调用一个不带参数的(测试)方法,但返回一个字符串就可以了.如果我向我的方法添加一个参数我得到一个奇怪的错误:
{"ExceptionDetail":{"HelpLink":null,"InnerException":null,"Message":"令牌'\"'是预期的但是找到'''.","StackTrace":"在System.Xml.XmlExceptionHelper .ThrowXmlException(XmlDictionaryReader reader,String res,String arg1,String arg2,String arg3)\ u000d\u000a at System.Xml.XmlExceptionHelper.ThrowTokenExpected(XmlDictionaryReader reader,String expected,Char found)\ u000d\u000a at System.Runtime.Serialization System.ServiceModel.Dispatcher.DataContractJsonSerializerOperationFormatter.DeserializeBodyCore(XmlDictionaryReader reader,Object []参数,布尔的System.Runtime.Serialization.Json.XmlJsonReader.Read()\ u000d\u000a的.Json.XmlJsonReader.ParseStartElement()\ u000d\u000a isRequest)\ u000d\u000a在System.ServiceModel.Dispatcher.DataContractJsonSerializerOperationFormatter.DeserializeBody(XmlDictionaryReader reader,MessageVersion version,String action,MessageDescription messageDescription,Object [] parameters,Boolean isRequest)\ u000d\u000a at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeBodyContents(Message message,Object [] parameters,Boolean isRequest)\u000d\u000a at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeRequest(Message message,Object [] parameters)\ u000d\u000a at System.ServiceModel.Dispatcher.DemultiplexingDispatchMessageFormatter.DeserializeRequest(Message message,Object [] parameters)\ u000d\u000a在System.ServiceModel.Dispatcher.UriTemplateDispatchFormatter.DeserializeRequest(消息消息,Object []参数)\ u000d\u000a at System.ServiceModel.Dispatcher.CompositeDispatchFormatter.DeserializeRequest(消息消息,System.ServiceModel上System.ServiceModel.Dispatcher.DispatchOperationRuntime.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc&rpc)\ u000d\u000a的System.ServiceModel.Dispatcher.DispatchOperationRuntime.DeserializeInputs(MessageRpc&rpc)\ u000d\u000a中的Object []参数)\ u000d\u000a. System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc&rpc)\ u000d\u000a中的Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc&rpc)\ u000d\u000a位于System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3(MessageRpc&rpc)\ u000d\u000a at at在System.ServiceModel.Dispatcher.MessageRpc的System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc&rpc)\ u000d\u000a处的System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc&rpc)\ u000d\u000a.Process(Boolean isOperationContextSet)","Type":"System.Xml.XmlException"},"ExceptionType":"System.Xml.XmlException","Message":"令牌'\"'是预期的但是找到''' .","StackTrace":"在System.Xml.XmlExceptionHelper.ThrowXmlException(XmlDictionaryReader reader,String res,String arg1,String arg2,String arg3)\ u000d\u000a at System.Xml.XmlExceptionHelper.ThrowTokenExpected(XmlDictionaryReader reader,String expected ,Char发现)在System.ServiceModel.Dispatcher上的System.Runtime.Serialization.Json.XmlJsonReader()\ u000d\u000a处的System.Runtime.Serialization.Json.XmlJsonReader.ParseStartElement()\ u000d\u000a处\ u000d\u000a .DataContractJsonSerializerOperationFormatter.DeserializeBodyCore(XmlDictionaryReader reader,Object []参数,System.ServiceModel.Dispatcher.OperationFormatter上的System.ServiceModel.Dispatcher.DataContractJsonSerializerOperationFormatter.DeserializeBody(XmlDictionaryReader reader,MessageVersion version,String action,MessageDescription messageDescription,Object []参数,Boolean isRequest)\ u000d\u000a中的布尔isRequest)\ u000d\u000a .DeserializeBodyContents(Message message,Object [] parameters,Boolean isRequest)\ u000d\u000a at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeRequest(Message message,Object [] parameters)\ u000d\u000a at System.ServiceModel.Dispatcher.DemultiplexingDispatchMessageFormatter.在System.ServiceModel的System.ServiceModel.Dispatcher.UriTemplateDispatchFormatter.DeserializeRequest(消息消息,Object []参数)\ u000d\u000a处的DeserializeRequest(消息消息,Object []参数)\ u000d\u000a.System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc&rpc)中的System.ServiceModel.Dispatcher.DispatchOperationRuntime.DeserializeInputs(MessageRpc&rpc)\ u000d\u000a中的Dispatcher.CompositeDispatchFormatter.DeserializeRequest(消息消息,Object []参数)\ u000d\u000a\u000d\u000a at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc&rpc)\ u000d\u000a at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc&rpc)\ u000d\u000a at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3 (MessageRpc&rpc)\ u000d\u000a在System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc&rpc)\ u000d\u000a at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc&rpc)\ u000d\u000a at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)"}
我的jquery看起来像这样,但我尝试将我发送的实际数据更改为一个字符串序列化的json(如你所见)到一个具有相同悲伤结果的纯json对象.
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "ajax/Statistics.svc/Get7DaysStatistics",
dataType: "json",
data: "{'customerId': '2'}",
timeout: 10000,
success: function(obj) { updateStatistics(obj.d); },
error: function(xhr) {
if (xhr.responseText)
$("body").html(xhr.responseText);
else
alert('unknown error');
return;
}
});
wcf服务看起来像这样:
[SuppressMessage("Microsoft.Performance", "CA1822:MarkMembersAsStatic"), OperationContract]
public string Get7DaysStatistics(string customerId)
{
Debug.WriteLine(customerId);
return "Test done";
}
它放在一个具有以下属性的类中:
[ServiceContract(Namespace = "")] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
我不会在web.config中列出配置来保持这条长消息"短",但是如果有人认为他们可以使用它我可以发布它 - 我只想强调我可以调用一个方法并得到一个结果 - 字符串或者甚至是我可以读取的json对象,只要我不将任何数据传递给wcf服务.
在要发送给服务的JSON中使用双引号而不是单引号.也就是说,改变:
data: "{'customerId': '2'}",
至
data: '{"customerId": "2"}',
我在本地测试了这个,这解决了这个问题.
顺便说一句,我使用我在使用内置ASP.NET工具以外的库调用ASMX和WCF服务时经常使用的方法来调试它.我使用asp:ScriptReference创建的客户端代理调用服务,然后使用HTTP嗅探器(例如HttpFox for FireFox)检查发送到服务器的请求,并将请求与jQuery发送的请求进行比较.然后,您通常可以快速查看请求的不同之处(也可能是错误的).在这种情况下,很明显发送的POST数据存在差异.
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