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FileStream.Unlock Method

Allows access by other processes to all or part of a file that was previously locked.

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

public:
virtual void Unlock (
	long long position, 
	long long length
)
public void Unlock (
	long position, 
	long length
)
public function Unlock (
	position : long, 
	length : long
)

Parameters

position

The beginning of the range to unlock.

length

The range to be unlocked.

Exception typeCondition

ArgumentOutOfRangeException

position or length is negative.

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

This code example is part of a larger example provided for the Lock method.

// Unlock the specified part of the file.
case 'U':
   try
   {
      fileStream->Unlock( textLength - 1, byteCount );
      Console::WriteLine( "The specified part "
      "of file has been unlocked." );
   }
   catch ( IOException^ e ) 
   {
      Console::WriteLine( "{0}: The specified part of file is "
      "not locked by the current process.", e->GetType()->Name );
   }

   break;

default:
   

// Unlock the specified part of the file.
case 'U' : 
    try {
        fileStream.Unlock(textLength - 1, byteCount);
        Console.WriteLine(("The specified part "
            + "of file has been unlocked."));
    }
    catch(IOException e) {                            
        Console.WriteLine(
            "{0}: The specified part of file is "
            + "not locked by the current process.",
            e.GetType().get_Name());
    }
    break;

Windows 98, Windows 2000 SP4, Windows Millennium Edition, 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
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