Skip Headers
Oracle® Data Provider for .NET Developer's Guide
11g Release 1 (11.1)

B28375-01
Go to Documentation Home
Home
Go to Book List
Book List
Go to Table of Contents
Contents
Go to Index
Index
Go to Master Index
Master Index
Go to Feedback page
Contact Us

Go to previous page
Previous
Go to next page
Next
PDF · Mobi · ePub

OracleXmlStream Class

An OracleXmlStream object represents a read-only stream of XML data stored in an OracleXmlType object.

Class Inheritance

System.Object

  System.MarshalByRefObject

    System.Stream

      System.OracleXmlStream

Declaration

// C#
public sealed class OracleXmlStream : IDisposable, ICloneable

Thread Safety

All public static methods are thread-safe, although instance methods do not guarantee thread safety.

Requirements

Namespace: Oracle.DataAccess.Types

Assembly: Oracle.DataAccess.dll

Microsoft .NET Framework Version: 1.x or 2.0

This class can only be used with Oracle9i Release 2 (9.2) and later.


OracleXmlStream Members

OracleXmlStream members are listed in the following tables:

OracleXmlStream Constructors

The OracleXmlStream constructors are listed in Table 6-12.

Table 6-12 OracleXmlStream Constructors

Constructor Description

OracleXmlStream Constructor

Creates an instance of an OracleXmlStream object which provides a Stream representation of the XML data stored in an OracleXmlType


OracleXmlStream Static Methods

The OracleXmlStream static methods are listed in Table 6-13.

Table 6-13 OracleXmlStream Static Methods

Methods Description

Equals

Inherited from System.Object (Overloaded)


OracleXmlStream Instance Properties

The OracleXmlStream instance properties are listed in Table 6-14.

Table 6-14 OracleXmlStream Instance Properties

Properties Description

CanRead

Indicates whether or not the XML stream can be read

CanSeek

Indicates whether or not forward and backward seek operation can be performed

CanWrite

Not Supported

Connection

Indicates the OracleConnection that is used to retrieve the XML data

Length

Indicates the number of bytes in the XML stream

Position

Gets or sets the byte position within the stream

Value

Returns the XML data, starting from the first character in the stream as a string


OracleXmlStream Instance Methods

The OracleXmlStream instance methods are listed in Table 6-15.

Table 6-15 OracleXmlStream Instance Methods

Methods Description

BeginRead

Inherited from System.IO.Stream

BeginWrite

Inherited from System.IO.Stream

Clone

Creates a copy of an OracleXmlStream object

Close

Closes the current stream and releases any resources associated with it

Dispose

Releases resources allocated by this object

EndRead

Inherited from System.IO.Stream

EndWrite

Inherited from System.IO.Stream

Equals

Inherited from System.Object

Flush

Not Supported

GetHashCode

Inherited from System.Object

GetLifetimeService

Inherited from System.MarshalByRefObject

GetType

Inherited from System.Object

InitializeLifetimeService

Inherited from System.MarshalByRefObject

Read

Reads a specified amount from the current stream instance and populates the array buffer (Overloaded)

ReadByte

Inherited from System.IO.Stream

Seek

Sets the position within the current stream and returns the new position within the current stream

SetLength

Not Supported

ToString

Inherited from System.Object

Write

Not Supported

WriteByte

Not Supported



OracleXmlStream Constructor

This constructor creates an instance of an OracleXmlStream object which provides a Stream representation of the XML data stored in an OracleXmlType object.

Declaration

// C#
public OracleXmlStream(OracleXmlType xmlType);

Parameters

Remarks

The OracleXmlStream implicitly uses the OracleConnection object from the OracleXmlType object from which it was constructed.


OracleXmlStream Static Methods

The OracleXmlStream static methods are listed in Table 6-16.

Table 6-16 OracleXmlStream Static Methods

Methods Description

Equals

Inherited from System.Object (Overloaded)



OracleXmlStream Instance Properties

The OracleXmlStream instance properties are listed in Table 6-17.

Table 6-17 OracleXmlStream Instance Properties

Properties Description

CanRead

Indicates whether or not the XML stream can be read

CanSeek

Indicates whether or not forward and backward seek operation can be performed

CanWrite

Not Supported

Connection

Indicates the OracleConnection that is used to retrieve the XML data

Length

Indicates the number of bytes in the XML stream

Position

Gets or sets the byte position within the stream

Value

Returns the XML data, starting from the first character in the stream as a string


CanRead

Overrides Stream

This property indicates whether or not the XML stream can be read.

Declaration

// C#
public override bool CanRead{get;}

Property Value

If the XML stream is can be read, returns true; otherwise, returns false.

CanSeek

Overrides Stream

This property indicates whether or not forward and backward seek operation can be performed.

Declaration

// C#
public override bool CanSeek{get;}

Property Value

If forward and backward seek operations can be performed, this property returns true. Otherwise, returns false.

Connection

This instance property indicates the OracleConnection that is used to retrieve the XML data.

Declaration

// C#
public OracleConnection Connection {get;}

Property Value

An OracleConnection.

Exceptions

ObjectDisposedException - The object is already disposed.

Length

Overrides Stream

This property indicates the number of bytes in the XML stream.

Declaration

// C#
public override Int64 Length{get;}

Property Value

An Int64 value representing the number of bytes in the XML stream. An empty stream has a length of 0 bytes.

Exceptions

ObjectDisposedException - The object is already disposed.

InvalidOperationException - The OracleConnection is not open or has been closed during the lifetime of the object.

Position

Overrides Stream

This property gets or sets the byte position within the stream.

Declaration

// C#
public override Int64 Position{get; set;}

Property Value

An Int64 that indicates the current position in the stream.

Exceptions

ObjectDisposedException - The object is already disposed.

InvalidOperationException - The OracleConnection is not open or has been closed during the lifetime of the object.

ArgumentOutOfRangeException - The Position is less than 0.

Remarks

The beginning of the stream is represented by position 0. Seeking to any location beyond the length of the stream is supported.

Value

This property returns the XML data, starting from the first character of the stream as a string.

Declaration

// C#
public string Value{get; set;}

Property Value

A string.

Exceptions

ObjectDisposedException - The object is already disposed.

InvalidOperationException - The OracleConnection is not open or has been closed during the lifetime of the object.

Remarks

The value of Position is neither used nor changed by using this property.

The maximum length of the string that can be returned by this property is 2 GB.


OracleXmlStream Instance Methods

The OracleXmlStream instance methods are listed in Table 6-18.

Table 6-18 OracleXmlStream Instance Methods

Methods Description

BeginRead

Inherited from System.IO.Stream

BeginWrite

Inherited from System.IO.Stream

Clone

Creates a copy of an OracleXmlStream object

Close

Closes the current stream and releases any resources associated with it

Dispose

Releases resources allocated by this object

EndRead

Inherited from System.IO.Stream

EndWrite

Inherited from System.IO.Stream

Equals

Inherited from System.Object

Flush

Not Supported

GetHashCode

Inherited from System.Object

GetLifetimeService

Inherited from System.MarshalByRefObject

GetType

Inherited from System.Object

InitializeLifetimeService

Inherited from System.MarshalByRefObject

Read

Reads a specified amount from the current XML stream instance and populates the array buffer (Overloaded)

ReadByte

Inherited from System.IO.Stream

Seek

Sets the position within the current stream and returns the new position within the current stream

SetLength

Not Supported

ToString

Inherited from System.Object

Write

Not Supported

WriteByte

Not Supported


Clone

This method creates a copy of an OracleXmlStream object.

Declaration

// C#
public object Clone();

Return Value

An OracleXmlStream object.

Implements

ICloneable

Exceptions

ObjectDisposedException - The object is already disposed.

InvalidOperationException - The OracleConnection is not open or has been closed during the lifetime of the object.

Remarks

The cloned object has the same property values as that of the object being cloned.

Close

Overrides Stream

This method closes the current stream and releases any resources associated with it.

Declaration

// C#
public override void Close();

Dispose

This public method releases resources allocated by this object.

Declaration

// C#
public void Dispose();

Implements

IDisposable

Remarks

The object cannot be reused after being disposed. Although some properties can still be accessed, their values cannot be accountable. Since resources are freed, method calls can lead to exceptions.

Read

This method reads a specified amount from the current XML stream instance and populates the array buffer.

Overload List:

Read(byte[ ], int, int)

Overrides Stream

This method reads a specified amount of unicode bytes from the current instance, advances the position within the stream, and populates the byte array buffer.

Declaration

// C#
public override int Read(byte[ ] buffer, int offset, int count);

Parameters

Return Value

The number of unicode bytes read into the given byte[] buffer or 0 if the end of the stream has been reached.

Remarks

This method reads a maximum of count bytes from the current stream and stores them in buffer beginning at offset. The current position within the stream is advanced by the number of bytes read. However, if an exception occurs, the current position within the stream remains unchanged.

The XML data is read starting from the position specified by the Position property.

Exceptions

ObjectDisposedException - The object is already disposed.

InvalidOperationException - The OracleConnection is not open or has been closed during the lifetime of the object.

Read(char[ ], int, int)

Overrides Stream

This method reads a specified amount of characters from the current instance, advances the position within the stream, and populates the character array buffer.

Declaration

// C#
public override int Read(char[ ] buffer, int offset, int count);

Parameters

Return Value

The return value indicates the number of characters read from the stream or 0 if the end of the stream has been reached.

Exceptions

ObjectDisposedException - The object is already disposed.

InvalidOperationException - The OracleConnection is not open or has been closed during the lifetime of the object.

Remarks

This method requires that the Position on the stream instance be zero or an even number.

The XML data is read starting from the position specified by the Position property.

Seek

Overrides Stream.

This method sets the position within the current stream and returns the new position within the current stream.

Declaration

// C#
public long Seek(long offset, SeekOrigin origin);

Parameters

Return Value

The new Position within the current stream.

Exceptions

ObjectDisposedException - The object is already disposed.

InvalidOperationException - The OracleConnection is not open or has been closed during the lifetime of the object

Remarks

Use the CanSeek property to determine whether or not the current instance supports seeking. Seeking to any location beyond the length of the stream is supported.