我创建了一个WCF服务，它托管在Windows服务中。当我通过解决方案资源管理器中的右侧客户端菜单向asp.net Web表单项目添加了对该服务的Web引用时，我能够访问该服务并添加对它的引用。
现在我想通过AJAX客户端（即在ASP.NET项目中通过ScriptManager组件）访问此服务，并在计时器中调用服务以获得连续的值流。
我从未在AJAX或网络上工作太多，我没有在网上找到合适的例子。
我正在使用WSHttpBinding。
我发布了我的代码，以便您可以告诉我哪里做错了。
WCF服务库代码：
ITestService.cs代码......
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.ServiceModel.Web;
namespace TestServiceLibrary
{
// NOTE: If you change the interface name "IService1" here, you must also update the reference to "IService1" in App.config.
[ServiceContract(Namespace="TestServiceLibrary")]
public interface ITestService
{
[OperationContract]
[WebGet]
double Add(double n1, double n2);
// TODO: Add your service operations here
}
}
TestService.cs代码...............
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
namespace TestServiceLibrary
{
// NOTE: If you change the class name "Service1" here, you must also update the reference to "Service1" in App.config.
public class TestService : ITestService
{
public double Add(double n1, double n2)
{
return n1 + n2;
}
}
}
TestServiceHost.cs（控制台应用程序的代码）
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using TestServiceLibrary;
namespace TestServiceHost
{
class Program
{
static void Main(string[] args)
{
ServiceHost myhost = new ServiceHost(typeof(TestService));
myhost.Open();
while (System.Console.ReadKey().Key != System.ConsoleKey.Enter)
{
//System.Threading.Thread.Sleep(100);
}
myhost.Close();
}
}
}
app.config的XML配置...在wcf服务库和wcf服务主机中都是一样的（在这种情况下是控制台应用程序..）
<?xml version="1.0" encoding="utf-8" ?>
<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="TestServiceLibrary.TestService" behaviorConfiguration="TestServiceLibrary.Service1Behavior">
<host>
<baseAddresses>
<add baseAddress = "http://localhost:8731/TestServiceLibrary/TestService/" />
</baseAddresses>
</host>
<!-- Service Endpoints -->
<!-- Unless fully qualified, address is relative to base address supplied above -->
<endpoint name="TestService_wsHttpBinding" address ="" binding="wsHttpBinding" contract="TestServiceLibrary.ITestService">
<!--
Upon deployment, the following identity element should be removed or replaced to reflect the
identity under which the deployed service runs. If removed, WCF will infer an appropriate identity
automatically.
-->
<identity>
<dns value="localhost"/>
</identity>
</endpoint>
<!-- Metadata Endpoints -->
<!-- The Metadata Exchange endpoint is used by the service to describe itself to clients. -->
<!-- This endpoint does not use a secure binding and should be secured or removed before deployment -->
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="TestServiceLibrary.Service1Behavior">
<!-- To avoid disclosing metadata information,
set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="True"/>
<!-- To receive exception details in faults for debugging purposes,
set the value below to true. Set to false before deployment
to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="False" />
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>
Web客户端（asp.net客户端，default.aspx）代码......
<!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>Simple AJAX Service Client Page</title>
<script type="text/javascript">
// <![CDATA[
// This function creates an asynchronous call to the service
function makeCall(operation){
var n1 = document.getElementById("num1").value;
var n2 = document.getElementById("num2").value;
// If user filled out these fields, call the service
if(n1 && n2){
// Instantiate a service proxy
var proxy = new TestServiceLibrary.ITestService();
// Call correct operation on proxy
switch(operation){
case "Add":
proxy.Add(parseFloat(n1), parseFloat(n2), onSuccess, onFail, null);
break;
}
}
}
// This function is called when the result from the service call is received
function onSuccess(mathResult){
document.getElementById("result").value = mathResult;
}
// This function is called if the service call fails
function onFail(){
document.getElementById("result").value = "Error";
}
// ]]>
</script>
</head>
<body>
<h1>
Simple AJAX Service Client Page</h1>
<p>
First Number:
<input type="text" id="num1" /></p>
<p>
Second Number:
<input type="text" id="num2" /></p>
<input id="btnAdd" type="button" onclick="return makeCall('Add');" value="Add" />
<p>
Result:
<input type="text" id="result" /></p>
<form id="mathForm" action="" runat="server">
<asp:ScriptManager ID="ScriptManager" runat="server">
<Services>
<asp:ServiceReference Path="http://localhost:8732/TestServiceLibrary/TestService/" />
</Services>
</asp:ScriptManager>
</form>
</body>
</html>
在ajax中通过asp.net访问webservice时出现的错误 Microsoft JScript运行时错误：'TestServiceLibrary'未定义
请仔细阅读此代码并帮助我找到问题所在。谢谢大家的回复。
答案 0 :(得分：2)
看起来问题出在我的服务托管和我正在使用的端点上。
我应该在控制台应用程序中修改我的服务托管以使用WebServiceHost而不是ServiceHost，然后只有ajax客户端可以与我的服务通信。我应该使用webHttpBinding而不是wsHttpBinding。
因此webHosting的代码如下。
using (var host = new WebServiceHost(
typeof(TestService)))
{
// Start listening for messages
host.Open();
Console.WriteLine("Press any key to stop the service.");
Console.ReadKey();
// Close the service
host.Close();
}
我的控制台的xml配置是
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<system.serviceModel>
<services>
<service
name="TestServiceLibrary.TestService"
behaviorConfiguration="">
<endpoint address="http://localhost:8732/TestService"
binding="webHttpBinding"
bindingConfiguration=""
name="TestService_WebHttp"
contract="TestServiceLibrary.ITestService" />
</service>
</services>
</system.serviceModel>
</configuration>
现在，当我做了这个更改时，我可以通过即使用以下网址调用我的服务，即 http：// localhost：8732 / TestService / Add？n1 = 20＆amp; n2 = 20 和返回的结果如下 <double xmlns="http://schemas.microsoft.com/2003/10/Serialization/">40</double>
最后我找到了解决问题的方法。我使用JSON作为通信数据的方式，接收数据的脚本如下：
<script type="text/javascript">
$("#mybutton").click(function () {
$.getJSON("http://localhost:8732/TestService/Add", null, function (result) {
});
});
</script>
答案 1 :(得分：0)
使用像firebug这样的工具来确定请求发生了什么。 WSHttpBinding默认是安全的。检查您的安全设置。首先尝试没有安全性，以确保它不是安全问题。
答案 2 :(得分：0)
您是否曾尝试从AJAX客户端连接到该服务？如果是这样，你有任何错误吗？
如果没有看到代码，可能会有许多事情，如Chandermani所说。
我没有使用WCF进行AJAX，但是查看Preet推荐的文章，我建议您检查（如果您还没有）您的AJAX客户端根据文章提供必要的代码。
您的服务操作是否用[WebGet]修饰？
您是否正确设置了AJAX客户端的配置文件？服务的配置文件是否设置正确？