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StreamWriter::WriteAsync Method (String)

.NET Framework 4.5

Writes a string to the stream asynchronously.

Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)

[ComVisibleAttribute(false)]
[HostProtectionAttribute(SecurityAction::LinkDemand, ExternalThreading = true)]
public:
virtual Task^ WriteAsync(
	String^ value
) override

Parameters

value: Type: System::String
The string to write to the stream. If value is nullptr, nothing is written.

Return Value

Type: System.Threading.Tasks::Task
A task that represents the asynchronous write operation.

Exceptions

Exception	Condition
ObjectDisposedException	The stream writer is disposed.
InvalidOperationException	The stream writer is currently in use by a previous write operation.

Remarks

Note
The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: ExternalThreading. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

Note

The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: ExternalThreading. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

Examples

The following example shows how to write a string to a text file by using the WriteAsync(String) method.

C++

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

Version Information

.NET Framework

Supported in: 4.5

.NET for Windows Store apps

Supported in: Windows 8

Platforms

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

StreamWriter Class

WriteAsync Overload

System.IO Namespace

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