使用 Google 从 .NET 代码获取用户位置

发布于 2024-07-30 11:52:34 字数 1299 浏览 4 评论 0原文

我想在会话期间存储用户在 ASP.NET MVC 网站上的当前位置。因为我想使用位置服务器端，所以我认为这应该起作用的方式（也许还有其他建议？）是当用户第一次访问网站时，我获取位置并将其存储在会话中，因此在以后的请求中它会这样做不必再次查找。

我能找到的最好方法是使用 Google 的 ClientLocation 方法：

<script src="http://www.google.com/jsapi?key=YOURAPIKEY" type="text/javascript"></script>
<script>
    google.load("jquery", "1.2.6");
    google.load("jqueryui", "1.5.2");
    var yourLocation = google.loader.ClientLocation.address.city + ", "
       + google.loader.ClientLocation.address.region;
</script>

我的问题是如何最好地将在此 Javascript 代码中查找的位置返回到服务器以存储在数据库或会话中。我知道我可以使用 jQuery 调用控制器操作来传递位置：

$.post("/Home/StoreLocation", location, function(){});

但为了性能，我不希望在每个页面加载时都发生这种情况。我想到的另一种方法是通过执行类似以下操作（调用地理编码）从 .NET 代码调用 Google 的 api：

string path = "http://maps.google.com/maps/geo?q=" + strAddress + "&output=csv&key=" + apiKey;
WebClient client = new WebClient();
string[] eResult = client.DownloadString(sPath).ToString().Split(',');
//Parse the array

但我找不到任何等效的方法来直接从这样的 URL 调用 ClientLocation - 所有我见过使用 google.loader 的示例（我认为这样做时不能使用它？）我考虑过的另一件事是使用 Google 的 .NET 库，但我在其中找不到任何内容来进行位置查找（也许我错了？）。

原文

I want to store a user's current location on an ASP.NET MVC website for the duration of a session. Because I want to use the location server-side, the way I think this should work (maybe other suggestions?) is when a user first hits the website, I get the location and store it in the session, so on later requests it does not have to be looked up again.

The best way I can find is to use Google's ClientLocation method:

<script src="http://www.google.com/jsapi?key=YOURAPIKEY" type="text/javascript"></script>
<script>
    google.load("jquery", "1.2.6");
    google.load("jqueryui", "1.5.2");
    var yourLocation = google.loader.ClientLocation.address.city + ", "
       + google.loader.ClientLocation.address.region;
</script>

My question is how best to get the location looked up in this Javascript code back to the server to store in the database or in the session. I know that I could call a controller action using jQuery to pass the location:

$.post("/Home/StoreLocation", location, function(){});

But for performance I don't want this to be happening on every single page load. The other way i thought to do it was to call Google's apis from .NET code by doing something like this (a call to geocoding):

string path = "http://maps.google.com/maps/geo?q=" + strAddress + "&output=csv&key=" + apiKey;
WebClient client = new WebClient();
string[] eResult = client.DownloadString(sPath).ToString().Split(',');
//Parse the array

But I can't find any equivalent way to call ClientLocation directly from a URL like this - all the examples I have seen use google.loader (which I don't think I can use when doing it this way?) Another thing I have considered is using Google's .NET library, but I can't find anything in there to do a location lookup (maybe I am wrong?).

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转身泪倾城 2024-08-06 11:52:35

在你的第二个例子中，我不太明白strAddress。你有客户的地址吗？或者说这是他们的IP？我刚刚用我的 IP 地址尝试了该 URL，它显示我在大约 1000 英里之外。

无论如何，我不明白#1 有什么问题。只需在您的 Site.Master 中添加类似的内容即可：

<script type="text/javascript">
  //other javascript here
  <% if (Sesssion.Contents["has_location"] == null) { %>
    $(document).ready(function_to_submit_location)
  <% } %>
</script>

edited 将 if 语句放入 ASP 标记中 - 它不是 javascript if。

为那些想要使用此代码的人进行编辑，您必须在控制器中放置一些内容，以便在获取位置时设置 session["has_location"] = true 。

In your second example, I don't quite understand strAddress. Do you have the client's address? Or is that their IP? I just tried that URL with my IP address and it says I'm about 1000 miles away.

Anyways, I don't see what's wrong with #1. Just have something like this in your Site.Master:

<script type="text/javascript">
  //other javascript here
  <% if (Sesssion.Contents["has_location"] == null) { %>
    $(document).ready(function_to_submit_location)
  <% } %>
</script>

edited to put the if statement in ASP tags -- it's not a javascript if.

edit for those that want to use this code you'd have to put something in your controller in order to set session["has_location"] = true when you get the location.

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