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BinaryReader.ReadInt32 Method

Reads a 4-byte signed integer from the current stream and advances the current position of the stream by four bytes.

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

public:
virtual int ReadInt32 ()
public int ReadInt32 ()
public function ReadInt32 () : int

Return Value

A 4-byte signed integer read from the current stream.
Exception typeCondition

EndOfStreamException

The end of the stream is reached.

ObjectDisposedException

The stream is closed.

IOException

An I/O error occurs.

BinaryReader does not restore the file position after an unsuccessful read.

BinaryReader reads this data type in little-endian format.

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

Get the size of a file.

FileInfo.Length

Get the attributes of a file.

File.GetAttributes

Set the attributes of a file.

File.SetAttributes

Determine if a file exists.

File.Exists

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

This code example is part of a larger example provided for the BinaryReader class.

BinaryReader^ binReader = gcnew BinaryReader( File::Open( fileName, FileMode::Open ) );
try
{
   
   // If the file is not empty, 
   // read the application settings.
   if ( binReader->PeekChar() != -1 )
   {
      aspectRatio = binReader->ReadSingle();
      lookupDir = binReader->ReadString();
      autoSaveTime = binReader->ReadInt32();
      showStatusBar = binReader->ReadBoolean();
      return;
   }
}
// If the end of the stream is reached before reading
// the four data values, ignore the error and use the
// default settings for the remaining values.
catch ( EndOfStreamException^ e ) 
{
   Console::WriteLine( "{0} caught and ignored. "
   "Using default values.", e->GetType()->Name );
}
finally
{
   binReader->Close();
}



BinaryReader binReader =
    new BinaryReader(File.Open(fileName, FileMode.Open));
try {
    // If the file is not empty, 
    // read the application settings.
    if ( binReader.PeekChar() !=-1  ) {
        aspectRatio = binReader.ReadSingle();
        lookupDir = binReader.ReadString();
        autoSaveTime = binReader.ReadInt32();
        showStatusBar = binReader.ReadBoolean();
    }
}

// If the end of the stream is reached before reading
// the four data values, ignore the error and use the
// default settings for the remaining values.
catch(EndOfStreamException e) {
    Console.WriteLine("{0} caught and ignored. "
        + "Using default values.", e.GetType().get_Name());
}
finally {
    binReader.Close();
}

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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