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WindowsRuntimeStreamExtensions::AsStreamForWrite Method (IOutputStream)

.NET Framework 4.6 and 4.5

Converts an output stream in the Windows Runtime to a managed stream in the .NET for Windows 8.x Store apps.

This API is not CLS-compliant. 

Namespace:  System.IO
Assembly:  System.Runtime.WindowsRuntime (in System.Runtime.WindowsRuntime.dll)

[ExtensionAttribute]
[CLSCompliantAttribute(false)]
public:
static Stream^ AsStreamForWrite(
	IOutputStream^ windowsRuntimeStream
)

Parameters

windowsRuntimeStream
Type: IOutputStream

The Windows Runtime IOutputStream object to convert.

Return Value

Type: System.IO::Stream
The converted stream.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IOutputStream. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

ExceptionCondition
ArgumentNullException

windowsRuntimeStream is nullptr.

A default buffer size of 16,384 bytes is used when converting the stream. To specify a different buffer size, use the AsStreamForWrite(IOutputStream) overload.

The following example shows how to use the AsStreamForWrite and AsStreamForRead methods to convert a managed stream to and from a stream in the Windows Runtime.

No code example is currently available or this language may not be supported.

Here's the XAML code that is associated with the previous example.

<Page
    x:Class="ExampleApplication.BlankPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:ExampleApplication"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <StackPanel Background="{StaticResource ApplicationPageBackgroundBrush}" VerticalAlignment="Center" HorizontalAlignment="Center">
        <TextBlock Text="Provide text to write to file:"></TextBlock>
        <TextBox Name="UserText" Width="400"></TextBox>
        <Button Name="CreateButton" Content="Create File" Click="CreateButton_Click"></Button>
        <Button Name="VerifyButton" Content="Verify Contents" Click="VerifyButton_Click"></Button>
        <TextBlock Name="Results"></TextBlock>
    </StackPanel>
</Page>

.NET Framework

Supported in: 4.6, 4.5

.NET for Windows Phone apps

Supported in: Windows Phone Silverlight 8
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