SalBinary

Namespace: PPJ.Runtime

Assembly: PPJ.Web.50 (5.0.0.0)

Wraps a byte array as a SAL binary value.

C#

public class SalBinary : ISalType

VB.NET

Public Class SalBinary
    Inherits ISalType

The supplied array is retained without copying. Both null and zero-length arrays represent SAL null. Access through ISalType reports DbType.Binary and returns DBNull.Value for a null value.

Example:

using PPJ.Runtime;

byte[] bytes = { 1, 2, 3 };
SalBinary value = new SalBinary(bytes);
SalNumber length = value.Length; // 3
value.Value[0] = 9;              // Also changes bytes[0].

SalBinary prefix = SalBinary.Empty;
value.SetBufferLength(ref prefix, 2); // Copies { 9, 2 }.

Constructors

SalBinary()

Initializes a SAL binary value with a null buffer.

SalBinary(buffer)

Initializes a binary value using the supplied buffer.

Name	Type	Description
buffer	Byte[]	The byte array to retain, or null. The array is not copied.

Fields

Name	Type	Description	Value
Empty	SalBinary	Represents the shared empty binary value.

Properties

IsNull

Boolean: Gets whether the buffer is null or empty.

Length

SalNumber: Gets the number of bytes in the buffer.

Value

Byte[]: Gets the underlying byte array.

The returned array is the stored array, not a copy. Modifying its elements changes this value.

Methods

GetBufferLength()

Returns the number of bytes in the buffer.

Returns: SalNumber. The buffer length, or zero for a null or empty value.

SetBufferLength(target, length)

Copies a prefix of this buffer into a new binary value.

Parameter	Type	Description
target	SalBinary	Receives the copied prefix, or Empty when the requested length is zero or negative.
length	Int32	The number of bytes to copy. A positive value must not exceed the source buffer length.

Returns: Boolean. True after the target has been assigned.

This method does not pad or grow the source buffer. Throws:

• ArgumentNullException The requested length is positive and the source buffer is null.
• ArgumentException The requested length exceeds the source buffer length.

Example:

using PPJ.Runtime;

SalBinary source = new SalBinary(new byte[] { 10, 20, 30, 40 });
SalBinary prefix = SalBinary.Empty;
source.SetBufferLength(ref prefix, 2);
// prefix.Value contains { 10, 20 }; source.Value still contains all four bytes.

source.SetBufferLength(ref prefix, 0); // Assigns SalBinary.Empty.
// A positive length greater than source.Value.Length is invalid.

Implements

Name	Description
ISalType	Exposes a SAL value in the form used for database parameter binding.