C# ABP 允许跨域请求

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首先配置Web Api：

1. 在Web API项目下，安装包

Install-Package Microsoft.AspNet.WebApi.Cors

2. 然后在 WebApiModule 的方法Initialize中，添加下面代码：（代码最好在ConfigureSwaggerUi的上面）

//设置跨域            var cors = new EnableCorsAttribute("*", "*", "*");            cors.SupportsCredentials = true;            GlobalConfiguration.Configuration.EnableCors(cors);

上面配置了Web Api的跨域，然后我们想要在Web MVC中也支持跨域。下面我们给出登录模块支持跨域的例子。

然后配置Web MVC项目，让登录支持跨域：

1.我们创建一个Attribute类，叫做AcceessOriginalAttribute，如下：

using System;using System.Collections.Generic;using System.Configuration;using System.Linq;using System.Web;using System.Web.Mvc;namespace MagicQCes.Web.Filters{    public class AcceessOriginalAttribute : ActionFilterAttribute, IExceptionFilter    {        public void InternalExuteAccessControle(HttpResponseBase response, HttpRequestBase request)        {            var header = response.Headers;            var requestHeader = request.Headers;            header.Set("Access-Control-Allow-Origin", requestHeader["Origin"] ?? "http://" + requestHeader["Host"]);            header.Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");            header.Set("Access-Control-Max-Age", "3600");            header.Set("Access-Control-Allow-Headers", "*");            header.Set("Access-Control-Allow-Credentials", "true");        }        public override void OnActionExecuting(ActionExecutingContext filterContext)        {            base.OnActionExecuting(filterContext);        }        public override void OnActionExecuted(ActionExecutedContext filterContext)        {            InternalExuteAccessControle(filterContext.HttpContext.Response, filterContext.HttpContext.Request);            base.OnActionExecuted(filterContext);        }        public override void OnResultExecuting(ResultExecutingContext filterContext)        {            base.OnResultExecuting(filterContext);        }        public override void OnResultExecuted(ResultExecutedContext filterContext)        {            base.OnResultExecuted(filterContext);        }        public void OnException(ExceptionContext filterContext)        {            filterContext.Result = new JsonResult()            {                Data = new { Succeed = 0, Message = filterContext.Exception.Message },                JsonRequestBehavior = JsonRequestBehavior.AllowGet            };            filterContext.ExceptionHandled = true;        }    }}

2.然后，我们在AccountController中，的Login方法中，添加上面属性，如下：

        [AcceessOriginal]        public async Task<JsonResult> Login(string usernameOrEmailAddress, string Password)

这样，登录也支持跨域了。

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