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ADO and RDS Objects
OBJECT: Parameter
Parameter
The ADO
Parameter
object provides detailed information about a single parameter used in a stored procedure or stored query.
Parameters are used to create
Parameterized Commands
. These are commands that, after they have been initially defined and stored, use parameters to change some detail in the text of the command before it is executed.
Each time a
Parameter
object is created, it is added to a
Parameters Collection
associated with a specific
Command
object. The
Command
object uses the
Parameters Collection
to pass these parameters in and out of the stored procedures and queries.
There are four major types of parameters: input, output, input/output and return.
PROPERTIES
Attributes Property
Returns a long value defining the characteristics of a
Parameter
object.
Syntax:
parameterobject.
Attributes
Direction Property
Sets or returns a
ParameterDirectionEnum
value that defines the type of the
Parameter
object (input, output, input/output and return).
Syntax:
parameterobject.
Direction
Name Property
Sets or returns a string that is the name of the
Parameter
object.
Syntax:
parameterobject.
Name
NumericScale Property
Sets or returns a byte value that is the number of digits allowed to the right of the decimal point for a numeric
Field
object.
Syntax:
parameterobject.
NumericScale
Precision Property
Sets or returns a byte value that is the maximum number of digits allowed in a numeric
Field
object.
Syntax:
parameterobject.
Precision
Size Property
Sets or returns a long value that is the maximum size in bytes or characters of a
Parameter
object.
Syntax:
parameterobject.
Size
Type Property
Sets or returns a
DataTypeEnum
value that specifies the data type.
Syntax:
parameterobject.
Type
Value Property
Sets or returns a variant value that is the value of the
Parameter
object.
Syntax:
parameterobject.
Value
COLLECTIONS
Parameters Collection
The
Parameters Collection
is a collection of the
Parameter
objects associated with a specific
Command
object.
Properties Collection
A collection of
Property
objects. Each
Property
object contains a provider-specific property.
METHODS
AppendChunk Method
Used to append a large amount (i.e., a large chunk) of text or binary data to a
Parameter
object.
Syntax:
parameterobject.
AppendChunk
(data)
Copyright 1999-2005 by Infinite Software Solutions, Inc. All rights reserved.
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