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FileStream::SetLength Method

.NET Framework 4.5

Sets the length of this stream to the given value.

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

public:
virtual void SetLength(
	long long value
) override

Parameters

value: Type: System::Int64
The new length of the stream.

Exceptions

Exception	Condition
IOException	An I/O error has occurred.
NotSupportedException	The stream does not support both writing and seeking.
ArgumentOutOfRangeException	Attempted to set the value parameter to less than 0.

Remarks

This method overrides SetLength.

If the given value is less than the current length of the stream, the stream is truncated. If the given value is larger than the current length of the stream, the stream is expanded. If the stream is expanded, the contents of the stream between the old and the new length are undefined.

A stream must support both writing and seeking for SetLength to work.

Note
Use the CanWrite property to determine whether the current instance supports writing, and the CanSeek property to determine whether seeking is supported. For additional information, see CanWrite and CanSeek.

For a list of common file and directory operations, see Common I/O Tasks.

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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

FileStream Class

System.IO Namespace

Other Resources

File and Stream I/O

How to: Read Text from a File

How to: Write Text to a File

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