1.新建控制器 ：

RedirectUrlController

 

[HttpGet]
        public void Get(string enterpriseId,string agentId)
        {
            var redirect_uri = "";

            string osPat = "mozilla|m3gate|winwap|openwave|Windows NT|Windows 3.1|95|Blackcomb|98|ME|X Window|Longhorn|ubuntu|AIX|Linux|AmigaOS|BEOS|HP-UX|OpenBSD|FreeBSD|NetBSD|OS/2|OSF1|SUN";


            var agent = Request.Headers["User-Agent"];

            Regex reg = new Regex(osPat);
            if (reg.IsMatch(agent))//pc302端跳转地址
            {
                redirect_uri += "/pc/index.html#/Home";
            }
            else
            {
                redirect_uri += "/h5/index.html#/begin";//手机端302跳转地址
            }

            var url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + appid +
                        "&redirect_uri=" +
                        HttpUtility.UrlEncode(redirect_uri) +
                        "&response_type=code&scope=snsapi_base&state=STATE#wechat_redirect";

            Response.Redirect(url);  //注意：没有http跳转到本域名下的对应地址，加上http跳转到别的域名
        }

2.访问路径：

http://localhost:55733/api/RedirectUrl?enterpriseId=1&agentId=2

自动跳转到：

https://open.weixin.qq.com/connect/oauth2/authorize?appid=&redirect_uri=https%3a%2f%2fwgc-pc-test.zhijiaxing.net%2fpc%2findex.html%23%2fHome&response_type=code&scope=snsapi_base&state=STATE#wechat_redirect