ASP.Net MVC中设置允许跨域

ASP.Net MVC中设置允许跨域，设置Access-Control-Allow-Origin - 最简单的方法

 

1. web.config 设置

<system.webServer>
    <httpProtocol>
        <customHeaders>
          <add name="Access-Control-Allow-Origin" value="*" />
          <add name="Access-Control-Allow-Headers" value="Origin, X-Requested-With, Content-Type, Accept" />
        </customHeaders>
    </httpProtocol>
</system.webServer>

 

2. MVC控制器

创建一个新的属性

public class AllowCrossSiteJsonAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        filterContext.RequestContext.HttpContext.Response.AddHeader("Access-Control-Allow-Origin", "*");
        base.OnActionExecuting(filterContext);
    }
}

[AllowCrossSiteJson]
public ActionResult YourMethod()
{
    return Json("Works better?");
}

对于ASP.NET Web API

using System;
using System.Web.Http.Filters;

public class AllowCrossSiteJsonAttribute : ActionFilterAttribute
{
    public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
    {
        if (actionExecutedContext.Response != null)
            actionExecutedContext.Response.Headers.Add("Access-Control-Allow-Origin", "*");

        base.OnActionExecuted(actionExecutedContext);
    }
}

标记整个API控制器：

[AllowCrossSiteJson]
public class ValuesController : ApiController
{

或个别API调用：

[AllowCrossSiteJson]
public IEnumerable<PartViewModel> Get()
{
    ...
}

 

转自：https://cloud.tencent.com/developer/ask/28318