TextReader.Peek Method

May 11, 2014

Reads the next character without changing the state of the reader or the character source. Returns the next available character without actually reading it from the input stream.

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

public virtual int Peek()

Return Value

Type: System.Int32
An integer representing the next character to be read, or -1 if no more characters are available or the stream does not support seeking.

ExceptionCondition
ObjectDisposedException

The TextReader is closed.

IOException

An I/O error occurs.

The Peek method returns an integer value in order to determine whether the end of the file, or another error has occurred. This allows a user to first check if the returned value is -1 before casting it to a Char type.

The current position of the TextReader is not changed by this operation. The returned value is -1 if no more characters are available. The default implementation returns -1.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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