Indicates one or more characteristics of an object.
Sets or returns a Long value.
For a Connection object, the value can be a sum of any one or more of these XactAttributeEnum values (default is zero):
|
Constant |
Value |
Description |
|
adXactCommitRetaining |
131072 |
Performs retaining commits, that is, calling CommitTrans automatically starts a new transaction. Not all providers will support this. |
|
adXactAbortRetaining |
262144 |
Performs retaining aborts, that is, calling RollbackTrans automatically starts a new transaction. Not all providers will support this. |
For a Parameter object, the value can be a sum of any one or more of these ParameterAttributesEnum values:
|
Constant |
Value |
Description |
|
adParamSigned |
16 |
Indicates that the parameter accepts signed values. (Default.) |
|
adParamNullable |
64 |
Indicates that the parameter accepts Null values. |
|
adParamLong |
128 |
Indicates that the parameter accepts long binary data. |
For a Field object, the value specifies characteristics of the field and can be a sum of any one or more of these FieldAttributeEnum values:
|
Constant |
Value |
Description |
|
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. |
|
adFldUpdatable |
4 |
Indicates that you can write to the field. |
|
adFldUnknownUpdatable |
8 |
Indicates that the provider cannot determine if you can write to the field. |
|
adFldFixed |
16 |
Indicates that the field contains fixed-length data. |
|
adFldIsNullable |
32 |
Indicates that the field accepts Null values. |
|
adFldMayBeNull |
64 |
Indicates that you can read Null values from the field. |
|
adFldLong |
128 |
Indicates that the field is a long binary field. Also indicates that you can use the AppendChunk and GetChunk methods. |
|
adFldRowID |
256 |
Indicates that the field contains some kind of record ID (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. |
|
adFldCacheDeferred |
4096 |
Indicates that the provider caches field values and that subsequent reads are done from the cache. |
For a Property object, the value can be a sum of any one or more of these PropertyAttributesEnum values:
|
Constant |
Value |
Description |
|
adPropNotSupported |
0 |
Indicates that the property is not supported by the provider. |
|
adPropRequired |
1 |
Indicates that the user must specify a value for this property before the data source is initialized. |
|
adPropOptional |
2 |
Indicates that the user does not need to specify a value for this property before the data source is initialized. |
|
adPropRead |
512 |
Indicates that the user can read the property. |
|
adPropWrite |
1024 |
Indicates that the user can set the property. |
Use the Attributes property to set or return characteristics of Connection objects, Parameter objects, Field objects, or Property objects.
For Connection objects, the Attributes property is read/write.
For Parameter objects, the Attributes property is read/write. For Field and Property objects, the Attributes property is read-only.
When you set multiple attributes, you can sum the appropriate constants. If you set the property value to a sum including incompatible constants, an error occurs.
Connection, Field, Parameter, Property
AppendChunk, BeginTrans, CommitTrans, RollbackTrans, GetChunk
| file: /Techref/language/asp/comp/daprop01_4.htm, 9KB, , updated: 1996/11/21 18:01, local time: 2024/11/25 01:35,
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