Question

在Detect if Network is Available中引入了Reachability类。 InternetConnectionStatus()似乎没有按我的意愿行事。我想检查WiFi是否可用，无论是否可以连接互联网。不知道是否是丢失的DNS服务器或类似的原因。目前，似乎始终测试Internet连接。 LocalWifiConnectionStatus()是更好的吗？

如何仅检查用户是否已登录WLAN连接？

Answer 1

打开Nuger包管理器
只需搜索插件即可 xam.plugin.connectivity 并安装它。

现在添加此代码以检查您的课程的互联网，并使用名称使用Plugin.Connectivity;

private bool CheckConnectivity()
    {
        var isConnected = CrossConnectivity.Current.IsConnected;
        return isConnected;
    }

Answer 2

我不知道自从我编写此代码以来是否有API更新，但您可以尝试阅读SSID：

    /// <summary>
    /// Gets the current SSID.
    /// </summary>
    /// <value>The current SSID.</value>
    public string CurrentSSID 
    {
        get
        {
            NSDictionary dict;
            var status = CaptiveNetwork.TryCopyCurrentNetworkInfo ("en0", out dict);
            if (status == StatusCode.NoKey)
            {
                return string.Empty;
            }

            var bssid = dict [CaptiveNetwork.NetworkInfoKeyBSSID];
            var ssid = dict [CaptiveNetwork.NetworkInfoKeySSID];
            var ssiddata = dict [CaptiveNetwork.NetworkInfoKeySSIDData];

            return ssid.ToString();
        }
    }

如果能够更好地满足您的需求，您还可以尝试使用LocalWifiConnectionStatus。

https://github.com/XForms/Xamarin-Forms-Labs/blob/master/src/Xamarin.Forms.Labs/Xamarin.Forms.Labs.iOS/Services/Reachability.cs

    /// <summary>
    /// The local WiFi connection status.
    /// </summary>
    /// <returns>
    /// The <see cref="NetworkStatus"/>.
    /// </returns>
    public static NetworkStatus LocalWifiConnectionStatus()
    {
        NetworkReachabilityFlags flags;
        return (!IsAdHocWiFiNetworkAvailable(out flags) || (flags & NetworkReachabilityFlags.IsDirect) == 0) ?
            NetworkStatus.NotReachable :
            NetworkStatus.ReachableViaWiFiNetwork;
    }

Answer 3

我知道这已经过时了，但我正在寻找同样的事情并将各种答案结合起来......任何人都有更好的建议或理由不这样做？

public NetworkState GetNetworkState()
{
    object ssid = null;
    NSDictionary dict = null;

    var status = CaptiveNetwork.TryCopyCurrentNetworkInfo("en0", out dict);
    if (status == StatusCode.OK)
        ssid = dict[CaptiveNetwork.NetworkInfoKeySSID];

    using (SystemConfiguration.NetworkReachability r = new NetworkReachability("www.appleiphonecell.com"))
    {
        NetworkReachabilityFlags flags;

        if (r.TryGetFlags(out flags))
        {
            if ((flags & NetworkReachabilityFlags.Reachable) != 0)
            {
                if (ssid != null && !string.IsNullOrEmpty(ssid.ToString()))
                    return NetworkState.Wifi;
                else
                    return NetworkState.Carrier;//we are not connected to wifi, but we can reach the site...
            }
        }
    }

    return NetworkState.None;
}

Answer 4

如果在

使用Objective-C，您的问题可以回答

How to check for local Wi-Fi (not just cellular connection) using iPhone SDK?

但是使用Objective-C的代码可以很容易地移植到xamarin c＃。请查看此链接

检查Xamarin iOS上是否有WIFI可用

4 个答案: