1.web.config:

2.在每个controller加方法

public string Options()

{

return null; // HTTP 200 response with empty body

}

方法2：

http://enable-cors.org/server_aspnet.html

Install-Package Microsoft.AspNet.WebApi.Cors

无需在web.config里面新增

//var corsAttr = new EnableCorsAttribute("http://180.76.160.7:8088", "Content-Type", "GET, POST, PUT, DELETE, OPTIONS");

var corsAttr = new EnableCorsAttribute("*", "*", "*");

config.EnableCors(corsAttr);

//config.EnableCors();