//允许所有的options请求,直接返回200状态码
private void Application_BeginRequest(object sender, EventArgs e)
{
if (HttpContext.Current.Request.HttpMethod == “OPTIONS”)
{
HttpContext.Current.Response.StatusCode = 200;
HttpContext.Current.Response.Headers[“Access-Control-Allow-Origin”] = HttpContext.Current.Request.Headers[“origin”];
HttpContext.Current.Response.End();
}
}
4.在webconfig中的Allow-Method中添加上options