ADO::FieldAttributeEnum
Specifies one or more attributes of a Field object.
| Constant |
Value |
Description |
adFldCacheDeferred |
4096 |
Indicates that the provider caches field values and that subsequent
reads are done from the cache. |
adFldFixed |
16 |
Indicates that the field contains fixed-length data. |
adFldIsChapter |
8192 |
Indicates that the field contains a chapter value, which specifies
a specific child recordset related to this parent field. Typically chapter
fields are used with data shaping or filters. |
adFldIsCollection |
262144 |
Indicates that the field specifies that the resource represented by
the record is a collection of other resources, such as a folder, rather
than a simple resource, such as a text file. |
adFldIsDefaultStream |
131072 |
Indicates that the field contains the default stream for the resource
represented by the record. For example, the default stream can be the
HTML content of a root folder on a Web site, which is automatically
served when the root URL is specified. |
adFldIsNullable |
32 |
Indicates that the field accepts null values. |
adFldIsRowURL |
65536 |
Indicates that the field contains the URL that names the resource
from the data store represented by the record. |
adFldLong |
128 |
Indicates that the field is a long binary field. Also indicates that
you can use the AppendChunk and GetChunk methods. |
adFldMayBeNull |
64 |
Indicates that you can read null values from the field. |
adFldMayDefer |
2 |
Indicates that the field is deferred—that is, the field values are
not retrieved from the data source with the whole record, but only when
you explicitly access them. |
adFldNegativeScale |
16384 |
Indicates that the field represents a numeric value from a column
that supports negative scale values. The scale is specified by the NumericScale
property. |
adFldRowID |
256 |
Indicates that the field contains a persistent row identifier that
cannot be written to and has no meaningful value except to identify
the row (such as a record number, unique identifier, and so forth). |
adFldRowVersion |
512 |
Indicates that the field contains some kind of time or date stamp
used to track updates. |
adFldUnknownUpdatable |
8 |
Indicates that the provider cannot determine if you can write to the
field. |
adFldUnspecified |
-1 |
Indicates that the provider does not specify the field attributes. |
adFldUpdatable |
4 |
Indicates that you can write to the field. |
|
