(转)asp.net mvc web api 可跨域方法

<locationpath="Sample.txt">
<system.webServer>
<httpProtocol>
<customHeaders>
<addname="Access-Control-Allow-Origin"value="*"/>
</customHeaders>
</httpProtocol>
</system.webServer>
</location>

usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Web;

usingSystem;
usingSystem.Web.Http.Filters;

namespaceWorkflow.Filters
{
publicclassAllowCrossSiteJsonAttribute:ActionFilterAttribute
{
publicoverridevoidOnActionExecuted(HttpActionExecutedContextactionExecutedContext)
{
if(actionExecutedContext.Response!=null)
actionExecutedContext.Response.Headers.Add("Access-Control-Allow-Origin","*");

base.OnActionExecuted(actionExecutedContext);
}
}
}

[AllowCrossSiteJson]
publicclassInstancesController:ApiController
{
//......

}