Question

如何创建一个AJAX-Enabled WCF Service

Answer 1

（一）创建一个WCF AJAX-enabled service
1. 打开Visual Studio 2012，创建一个ASP.NET Empty Web Application Project，命名为SandwichServices。这时Visual Studio的web.config文件内容为：

<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
</system.web>
</configuration>

2. 添加一个AJAX-enabled WCF Service，命名为CostService.svc

using System.ServiceModel;
using System.ServiceModel.Activation;

namespace SandwichServices
{
[ServiceContract(Namespace = "SandwichServices")]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class CostService
{
// To use HTTP GET, add [WebGet] attribute. (Default ResponseFormat is WebMessageFormat.Json)
// To create an operation that returns XML,
// add [WebGet(ResponseFormat=WebMessageFormat.Xml)],
// and include the following line in the operation body:
// WebOperationContext.Current.OutgoingResponse.ContentType = "text/xml";
[OperationContract]
public void DoWork()
{
// Add your operation implementation here
return;
}

}
}

因为我们不打算使用TCP等HTTP之外的Protocol，所以设置为AspNetCompatibilityEnabled。

3. 修改Namespace ServiceContractAttribute，并添加一个CostOfSandwiches方法

using System.ServiceModel;
using System.ServiceModel.Activation;

namespace SandwichServices
{
[ServiceContract(Namespace = "SandwichServices")]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class CostService
{
// To use HTTP GET, add [WebGet] attribute. (Default ResponseFormat is WebMessageFormat.Json)
// To create an operation that returns XML,
// add [WebGet(ResponseFormat=WebMessageFormat.Xml)],
// and include the following line in the operation body:
// WebOperationContext.Current.OutgoingResponse.ContentType = "text/xml";
[OperationContract]
public void DoWork()
{
// Add your operation implementation here
return;
}

[OperationContract]
public double CostOfSandwiches(int quantity)
{
return 1.25 * quantity;
}
}
}

4. 这时Visual Studio生成的web.config文件

<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
</system.web>
<system.serviceModel>
<behaviors>
<endpointBehaviors>
<behavior name="SandwichServices.CostServiceAspNetAjaxBehavior">
<enableWebScript />
</behavior>
</endpointBehaviors>
</behaviors>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true"
multipleSiteBindingsEnabled="true" />
<services>
<service name="SandwichServices.CostService">
<endpoint address="" behaviorConfiguration="SandwichServices.CostServiceAspNetAjaxBehavior"
binding="webHttpBinding" contract="SandwichServices.CostService" />
</service>
</services>
</system.serviceModel>
</configuration>