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FileStream.Position Property

Gets or sets the current position of this stream.

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

'Declaration
Public Overrides Property Position As Long
'Usage
Dim instance As FileStream
Dim value As Long

value = instance.Position

instance.Position = value
/** @property */
public long get_Position ()

/** @property */
public void set_Position (long value)

public override function get Position () : long

public override function set Position (value : long)

Property Value

The current position of this stream.
Exception typeCondition

NotSupportedException

The stream does not support seeking.

IOException

An I/O error occurs.

- or -

The position was set to a very large value beyond the end of the stream in Windows 98 or earlier.

ArgumentOutOfRangeException

Attempted to set the position to a negative value.

EndOfStreamException

Attempted seeking past the end of a stream that does not support this.

Seeking to any location beyond the length of the stream is supported. When you seek beyond the length of the file, the file size grows. In Microsoft Windows NT and newer, any data added to the end of the file is set to zero. In Microsoft Windows 98 or earlier, any data added to the end of the file is not set to zero, which means that previously deleted data is visible to the stream. Setting the position of the stream to a large value beyond the end of the stream in Windows 98 or earlier may result in an exception being raised.

The following table lists examples of other typical or related I/O tasks.

To do this...

See the example in this topic...

Create a text file.

How to: Write Text to a File

Write to a text file.

How to: Write Text to a File

Read from a text file.

How to: Read Text from a File

Append text to a file.

How to: Open and Append to a Log File

File.AppendText

FileInfo.AppendText

Rename or move a file.

File.Move

FileInfo.MoveTo

Copy a file.

File.Copy

FileInfo.CopyTo

Get the size of a directory.

FileInfo.Length

Get the attributes of a file.

File.GetAttributes

Set the attributes of a file.

File.SetAttributes

Create a subdirectory.

CreateSubdirectory

Read from a binary file.

How to: Read and Write to a Newly Created Data File

Write to a binary file.

How to: Read and Write to a Newly Created Data File

See the files in a directory.

Name

Sort files in a directory by size.

GetFileSystemInfos

The following example uses the Length and Position properties to check for an end-of-file condition.

If s.Length = s.Position Then
    Console.WriteLine("End of file has been reached.")
End If

if (s.get_Length() == s.get_Position()) {
    Console.WriteLine("End of file has been reached.");
}

if( s.Length==s.Position )
    Console.WriteLine("End of file has been reached.");

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
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