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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()

Return Value

Type: System.Int32
A 4-byte signed integer read from the current stream.

ExceptionCondition
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.

For a list of common I/O tasks, see Common I/O Tasks.

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


BinaryReader binReader =
    new BinaryReader(File.Open(fileName, FileMode.Open));
try
{
    // If the file is not empty,
    // read the application settings.
    // First read 4 bytes into a buffer to
    // determine if the file is empty.
    byte[] testArray = new byte[3];
    int count = binReader.Read(testArray, 0, 3);

    if (count != 0)
    {
        // Reset the position in the stream to zero.
        binReader.BaseStream.Seek(0, SeekOrigin.Begin);

        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().Name);
}
finally
{
    binReader.Close();
}


.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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