public static string ServerIPs
    {
      get { return GetServerIPs(); }
    }

    /// <summary>获取所有服务器IP</summary>
    /// <returns></returns>
    private static string GetServerIPs()
    {
      try
      {
        var client = new WebClient();
        client.Encoding = Encoding.UTF8;
        return client.DownloadString(string.Format("https://api.weixin.qq.com/cgi-bin/getcallbackip", WeCharBase.AccessToken));
      }
      catch (Exception ex)
      {
        return ex.Message;
      }
    }

/// <summary>获取微信服务器IP地址</summary>
    /// <returns></returns>
    public ActionResult ViewServerIPs()
    {
      return View();
    }

    /// <summary>获取微信服务器IP地址</summary>
    /// <returns></returns>
    public ActionResult GetServerIPs()
    {
      return Content(WeCharBase.ServerIPs);
    }

<script type="text/javascript" language="javascript">
  $(document).ready(function () {
    $("#btnGetServerIPs").click(function () {
      $.ajax({
        type: "Get",
        url: "/Subscript/GetServerIPs",
        success: function (responseTest) {
          $("#txtServerIPs").text(responseTest);
        }
      });
    });
  });
</script>

<table>
  <tr>
    <td>
      <div class="title">获取微信服务器IP地址</div>
      <textarea id="txtServerIPs" name="txtServerIPs" rows="10" style="width:500px"></textarea>
    </td>
    <td><input class="btncss" id="btnGetServerIPs" type="button" value=" 获取 " /></td>
  </tr>
</table>