Question

我试图为Windows手机制作一个笑话应用。该应用程序从互联网上获取笑话，所以，我希望它能够检查wifi信号或能够连接到互联网。我将如何创建它？

Answer 1

在WP8.1运行时，您可以从NetworkInformation类查询大部分内容，如下所示：

// need this namespace
using Windows.Networking.Connectivity;

bool is_wifi_connected = false;
ConnectionProfile current_connection_for_internet = NetworkInformation.GetInternetConnectionProfile();
if (current_connection_for_internet.IsWlanConnectionProfile)
{           
    if (current_connection_for_internet.GetNetworkConnectivityLevel() == NetworkConnectivityLevel.InternetAccess)
    {
        is_wifi_connected = true;
    }           
}

WP8.0您可以像NetworkInterfaceList那样查询大部分内容：

// see is wifi is ON and connected
using Microsoft.Phone.Net.NetworkInformation;

bool is_wifi_connected = false;
if (NetworkInterface.GetIsNetworkAvailable())
{
    NetworkInterfaceList nif = new NetworkInterfaceList();
    foreach(NetworkInterfaceInfo item in nif)
    {
        if (item.InterfaceSubtype == NetworkInterfaceSubType.WiFi && item.InterfaceState == ConnectState.Connected)
        {
            is_wifi_connected = true;
        }
    }
}

现在看看它是否可以连接到网站只需打开一个连接。您可以使用任何您喜欢的网络连接。只需在下载文件时使用WebClient和事件处理程序执行此操作。

using System.Net;

// check network and is_wifi_connected
if (System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable() && is_wifi_connected)
{
    WebClient downloader = new WebClient();
    Uri uri = new Uri("http://www.google.com", UriKind.Absolute);
    downloader.DownloadStringCompleted += new DownloadStringCompletedEventHandler(DownloadDone);
    downloader.DownloadStringAsync(uri);
}

void DownloadDone(object sender, DownloadStringCompletedEventArgs e)
{
    if (e.Result == null || e.Error != null)
    {
        MessageBox.Show("There was an error downloading the site.");
    }
    else
    {
        // your html file or what not is stored here
        string content = e.Result;
    }
}

Windows phone 8，检查wifi是否开启？

1 个答案: