如何解决VS2013：错误：无法找到类型或命名空间'Windows'？

Question

我想为Wifi Direct创建一项服务。如果我尝试添加引用，我在VS2013中看不到core-> windows选项。我已经更新了winSDK。 如何添加Windows.Devices.WifiDirect API？

Answer 1

可以使用

public sealed class WiFiDirectDevice : IDisposable 

这是一个示例代码来处理连接

Windows.Devices.WiFiDirect.WiFiDirectDevice wfdDevice; 
private async System.Threading.Tasks.Task<String> Connect(string deviceId) 
{ 
    string result = ""; 

    try 
    { 
     // No device Id specified. 
     if (String.IsNullOrEmpty(deviceId)) { return "Please specify a Wi- Fi Direct device Id."; } 

     // Connect to the selected Wi-Fi Direct device. 
     wfdDevice = await Windows.Devices.WiFiDirect.WiFiDirectDevice.FromIdAsync(deviceId); 

     if (wfdDevice == null) 
     { 
      result = "Connection to " + deviceId + " failed."; 
     } 

     // Register for connection status change notification. 
     wfdDevice.ConnectionStatusChanged += new TypedEventHandler<Windows.Devices.WiFiDirect.WiFiDirectDevice, object>(OnConnectionChanged); 

     // Get the EndpointPair information. 
     var EndpointPairCollection = wfdDevice.GetConnectionEndpointPairs(); 

     if (EndpointPairCollection.Count > 0) 
     { 
      var endpointPair = EndpointPairCollection[0]; 
      result = "Local IP address " + endpointPair.LocalHostName.ToString() + 
       " connected to remote IP address " + endpointPair.RemoteHostName.ToString(); 
     } 
     else 
     { 
      result = "Connection to " + deviceId + " failed."; 
     } 
    } 
    catch (Exception err) 
    { 
     // Handle error. 
     result = "Error occurred: " + err.Message; 
    } 

    return result; 
} 

private void OnConnectionChanged(object sender, object arg) 
{ 
    Windows.Devices.WiFiDirect.WiFiDirectConnectionStatus status = 
     (Windows.Devices.WiFiDirect.WiFiDirectConnectionStatus)arg; 

    if (status == Windows.Devices.WiFiDirect.WiFiDirectConnectionStatus.Connected) 
    { 
     // Connection successful. 
    } 
    else 
    { 
     // Disconnected. 
     Disconnect(); 
    } 
} 

private void Disconnect() 
{ 
    if (wfdDevice != null) 
    { 
     wfdDevice.Dispose(); 
    } 
}