This sample shows you how to a use datagram (UDP) socket to send and receive data using the DatagramSocket and related classes in the Windows.Networking.Sockets namespace in your Windows Runtime app.

Note  This sample was created using one of the universal app templates available in Visual Studio. It shows how its solution is structured so it can run on both Windows 8.1 and Windows Phone 8.1. For more info about how to build apps that target Windows and Windows Phone with Visual Studio, see Build apps that target Windows and Windows Phone 8.1 by using Visual Studio.

The client component of the sample creates a UDP socket, uses the socket to send and receive data, and closes the socket. The server component of the sample creates a UDP socket to listen for incoming network packets, receives incoming UDP packets from the client, sends data to the client, and closes the socket. This sample is provided in the JavaScript, C#, and C++ programming languages.

The client component of the sample demonstrates the following features:

The server component of the sample demonstrates the following features:

Note  Use of this sample requires network access using the loopback interface.

For a sample that shows how to use a stream (TCP) socket to send and receive data in a Windows Runtime app, download the StreamSocket sample.

Network capabilities

This sample requires that network capabilities be set in the Package.appxmanifest file to allow the app to access the network at runtime. These capabilities can be set in the app manifest using Microsoft Visual Studio.

To build the Windows version of the sample, set the following network capabilities:

To build the Windows Phone version of the sample, set the following network capabilities:

For more information on network capabilities, see How to set network capabilities.

Note  Network communications using an IP loopback address cannot normally be used for interprocess communication between a Windows Runtime app and a different process (a different Windows Runtime app or a desktop app) because this is restricted by network isolation. Network communication using an IP loopback address is allowed within the same process for communication purposes in a Windows Runtime app. For more information, see How to set network capabilities.

To obtain an evaluation copy of Windows 8.1, go to Windows 8.1.

To obtain an evaluation copy of Microsoft Visual Studio 2013 Update 2, go to Microsoft Visual Studio 2013.

Note  For Windows 8 app samples, download the Windows 8 app samples pack. The samples in the Windows 8 app samples pack will build and run only on Microsoft Visual Studio 2012.

Related topics

Other - C#/VB/C++ and XAML
Adding support for networking (Windows Runtime apps using C#/VB/C++ and XAML)
Connecting to network services (Windows Runtime apps using C#/VB/C++ and XAML)
How to send and receive network data with a datagram socket (Windows Runtime apps using C#/VB/C++ and XAML)
How to set network capabilities (Windows Runtime apps using C#/VB/C++ and XAML)
How to use advanced socket controls (Windows Runtime apps using C#/VB/C++ and XAML)
Troubleshooting and debugging network connections
Other - JavaScript and HTML
Adding support for networking (Windows Runtime apps using JavaScript and HTML)
Connecting to network services (Windows Runtime apps using JavaScript and HTML)
How to send and receive network data with a datagram socket (Windows Runtime apps using JavaScript and HTML)
How to set network capabilities (Windows Runtime apps using JavaScript and HTML)
How to use advanced socket controls (Windows Runtime apps using JavaScript and HTML)
Troubleshooting and debugging network connections
Reference
DatagramSocket
DatagramSocketMessageReceivedEventArgs
Windows.Networking
Windows.Networking.Sockets
Windows.Storage.Streams.DataReader
Windows.Storage.Streams.DataWriter
Samples
StreamSocket sample
Windows 8 app samples

Operating system requirements

Client
Windows 8.1
Server
Windows Server 2012 R2
Phone
Windows Phone 8.1

Build the sample

  1. Start Visual Studio 2013 Update 2 and select File > Open > Project/Solution.
  2. Go to the directory to which you unzipped the sample. Go to the directory named for the sample, and double-click the Visual Studio 2013 Update 2 Solution (.sln) file.
  3. Follow the steps for the version of the sample you want:
    • To build the Windows version of the sample:

      1. Select DatagramSocket.Windows in Solution Explorer.
      2. Press Ctrl+Shift+B, or use Build > Build Solution, or use Build > Build DatagramSocket.Windows.
    • To build the Windows Phone version of the sample:

      1. Select DatagramSocket.WindowsPhone in Solution Explorer.
      2. Press Ctrl+Shift+B or use Build > Build Solution or use Build > Build DatagramSocket.WindowsPhone.

Run the sample

The next steps depend on whether you just want to deploy the sample or you want to both deploy and run it.

Deploying the sample

Deploying and running the sample