asp.net mvc 跨域 get正常 post有问题 OPTIONS 返回404 完美解决方法 【小白篇】

global.asax.cs文件中  增加

        private void Application_BeginRequest(object sender, EventArgs e)

        {

            if (HttpContext.Current.Request.HttpMethod == "OPTIONS")

            {

                //HttpContext.Current.Response.StatusCode = 200;

                HttpContext.Current.Response.End();

            }

        }

如下图

web.config文件增加

    <!--配置跨域访问-->

    <httpProtocol>

      <customHeaders>

        <add name="Access-Control-Allow-Origin" value="*" />

        <add name="Access-Control-Allow-Headers" value="Content-Type,x-token" />

        <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />

      </customHeaders>

    </httpProtocol>

如下图