判断客户端是iOS还是Android，判断是不是在微信浏览器打开

bool flag = false;
string agent = System.Web.HttpContext.Current.Request.UserAgent.ToLower();
string[] keywords = { "iphone", "ipod", "ipad", "itouch" };

foreach (string item in keywords)
{
if (agent.Contains(item))
{
flag = true;
break;
}
}
if (flag)
{
ViewBag.Phone = "iOS";
}
else {
ViewBag.Phone = "Android";
}

if (agent.ToLower().Contains("micromessenger")
{
微信浏览器
}