Reading and writing data sample

This sample shows how to use the DataReader and DataWriter classes to store and retrieve data.

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.

This sample demonstrates the following scenarios:

• Creating a memory-backed stream by using the InMemoryRandomAccessStream class and storing strings by using a DataWriter object. When the write operation completes, a DataReader object extracts the stored strings from the stream and displays them.
• Opening a sequential-access stream over an image by using the OpenSequentialReadAsync and ReadBytes methods to retrieve and display its binary data.

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

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

Related topics

DataReader

DataWriter

OpenSequentialReadAsync

InMemoryRandomAccessStream

Windows 8 app samples

Related technologies

Operating system requirements

Build the sample

1. Start Microsoft Visual Studio 2013 Update 2 and select File > Open > Project/Solution.
2. Go to the directory to which you unzipped the sample. Then go to the subdirectory 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 DataReaderWriter.Windows in Solution Explorer.
     2. Press Ctrl+Shift+B, or use Build > Build Solution, or use Build > Build DataReaderWriter.Windows.

   • To build the Windows Phone version of the sample:

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

Run the sample

• To deploy and run the Windows version of the sample:

  1. Right-click DataReaderWriter.Windows in Solution Explorer and select Set as StartUp Project.
  2. To debug the sample and then run it, press F5 or use Debug > Start Debugging. To run the sample without debugging, press Ctrl+F5 or use Debug > Start Without Debugging.

• To deploy and run the Windows Phone version of the sample:

  1. Right-click DataReaderWriter.WindowsPhone in Solution Explorer and select Set as StartUp Project.
  2. To debug the sample and then run it, press F5 or use Debug > Start Debugging. To run the sample without debugging, press Ctrl+F5 or use Debug > Start Without Debugging.