July 2000
Intermediate to advanced
492 pages
14h 53m
English
Content preview from ASP in a Nutshell, 2nd Edition
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Parameter Object
A Parameter object holds the values of specific parameters for a parameterized Command object. In other words, if a given SQL statement or other command takes a given set of parameters that change each time you execute the command, a Parameter object can be used to hold those parameters' values.
Each instantiated Command Object has a Parameters collection to which you can add parameters.
In addition to holding parameters of a straight SQL statement, a Parameter object can also represent the in/out or return values of a stored procedure.
Table 12.13. Parameter Object Properties
|
Property |
Description |
|---|---|
|
Attributes |
Sets or determines whether a given parameter will accept various data, such as signed values, null values, or long values. |
|
Direction |
Reflects whether the parameter represents an input parameter, an output parameter, or both. |
|
Name |
The name of the parameter, if it has one. |
|
NumericScale |
The number of decimal places to which numeric values will be resolved. The data type of this property is Byte. |
|
Precision |
The number of significant digits to which numeric values will be resolved. The data type of this property is Byte. |
|
Size |
A Long representing the maximum number of bytes or characters valid for the Parameter object. |
|
Type |
An integer that represents the data type of the parameter's contents. For the Parameter object, this is a read/write property. |
|
Value |
The actual value of the contents of the parameter. |
Table 12.14. Parameter Object Collections ...
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