JavascriptCallbackBehaviorAttribute 类
定义
一个协定行为,可以使用此行为将 URL 查询字符串参数名称设置为不同于默认的“callback”的某个名称。A contract behavior that allows you to set the URL query string parameter name to something other than the default "callback".
public ref class JavascriptCallbackBehaviorAttribute sealed : Attribute, System::ServiceModel::Description::IContractBehavior
[System.AttributeUsage(System.AttributeTargets.Class, AllowMultiple=false)]
public sealed class JavascriptCallbackBehaviorAttribute : Attribute, System.ServiceModel.Description.IContractBehavior
[<System.AttributeUsage(System.AttributeTargets.Class, AllowMultiple=false)>]
type JavascriptCallbackBehaviorAttribute = class
inherit Attribute
interface IContractBehavior
Public NotInheritable Class JavascriptCallbackBehaviorAttribute
Inherits Attribute
Implements IContractBehavior
- 继承
- 属性
- 实现
注解
JSONP 是一种用于在 Web 浏览器中启用跨站点脚本支持的机制。JSONP is a mechanism used to enable cross-site, scripting support in Web browsers. JSONP 涉及发送一个带有作为 URL 查询字符串参数值提供的回调函数名称的请求。It involves sending a request with a callback function name provided as a URL query string parameter value. 相应的服务将返回一个响应,其中带有包装在对所提供的回调函数的调用中的常规 JSON 负载(如同一行可执行代码)。The service returns a response with the usual JSON payload wrapped in the call to the provided callback function as if it were a line of executable code.
以下是用于调用某个服务的 URL 的示例:http://baseAddress/Service/RESTService?callback=functionName。The following is an example of a URL used to call a service: http://baseAddress/Service/RESTService?callback=functionName. 在调用该服务时,该服务将使用以下 JSON 进行响应:When invoked, the service responds with the following JSON.
functionName({ "root":"Something});
通过 JavascriptCallbackBehaviorAttribute,开发人员可以指定 URL 查询字符串参数的名称以解释为回调参数。The JavascriptCallbackBehaviorAttribute allows developers to specify the name of the URL query string parameter to interpret as the callback parameter. 默认值为 "回叫" (不区分大小写) 。The default value is "callback" (not case sensitive).
下面的示例演示如何将此特性应用于服务协定。The following example shows how this attribute is applied to a service contract.
[ServiceContract]
[JavascriptCallbackBehavior]
public class Service1
{
[OperationContract]
[WebGet(ResponseFormat=WebMessageFormat.Json)]
public string GetData()
{
// ...
}
}
此特性仅适用于标记与一起使用的服务协定类型 WebHttpBinding 并且 CrossDomainScriptAccessEnabled 绑定的属性设置为的情况 true 。This attribute only applies when it marks a service contract type that is used with the WebHttpBinding and the CrossDomainScriptAccessEnabled property of the binding is set to true.
构造函数
| JavascriptCallbackBehaviorAttribute() |
初始化 JavascriptCallbackBehaviorAttribute 类的新实例。Initializes a new instance of the JavascriptCallbackBehaviorAttribute class. |
属性
| TypeId |
在派生类中实现时,获取此 Attribute 的唯一标识符。When implemented in a derived class, gets a unique identifier for this Attribute. (继承自 Attribute) |
| UrlParameterName |
获取或设置用于跨域脚本访问的 URL 查询字符串参数名称。Gets or sets the URL query string parameter name to use for cross-domain script access. |
方法
显式接口实现
| _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) |
将一组名称映射为对应的一组调度标识符。Maps a set of names to a corresponding set of dispatch identifiers. (继承自 Attribute) |
| _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) |
检索对象的类型信息,然后可以使用该信息获取接口的类型信息。Retrieves the type information for an object, which can be used to get the type information for an interface. (继承自 Attribute) |
| _Attribute.GetTypeInfoCount(UInt32) |
检索对象提供的类型信息接口的数量(0 或 1)。Retrieves the number of type information interfaces that an object provides (either 0 or 1). (继承自 Attribute) |
| _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) |
提供对某一对象公开的属性和方法的访问。Provides access to properties and methods exposed by an object. (继承自 Attribute) |