FieldList

Applies to:

VAccess

Sets or returns a variant array containing information on the fields of the current table as specified by DdfPath and TableName.

Remarks

The FieldList property accepts and returns a variant encapsulating a two-dimensional variant array. The first subscript references one property of the field, and the second references the field ordinal. The properties referenced by the first subscript are:


Subscript	Name	Variant Type	Description
0	fieldID	VT_I2	Unique key for field table dictionary entry.
1	fieldname	VT_BSTR	Name of the field, 20 characters max storage limit.
2	datatype	VT_I2	Data type code.
3	offset	VT_I2	Offset of field from start of record.
4	size	VT_I2	Size of field.
5	decimal	VT_I2	Number of fixed decimal places, or bit offset for BIT data type fields.
6	flags	VT_I2	Field flags. See the SQL Engine Reference for a description of field flag settings (search for "X$Field" in the index).
7	comment	VT_BSTR	Field comments stored in COMMENT.DDF.

When setting field information, the variant array must contain a minimum amount of information for each field to be defined. Required information includes a field name which is unique within the definition of the table, a valid datatype, and a valid size for data types which support more than one field length.

Note that the comment column of this array will be populated only if the DDFGetFieldComments method is called prior to reading the FieldList property.

If RefreshLocations is set to True, reading FieldList will cause the VAccess to re-read the DDF files and get the field information stored in the DDF. Changing FieldList with RefreshLocations set to True will no longer cause all changes to be immediately written to the DDF Files themselves. You must now call DdfAddTable, DdfModifyLocation, etc. to actually write the changes to the DDFs. This is a change in behavior since the release of the Pervasive PSQL SDK. If RefreshLocations is False, FieldList operations will read and update the VAccess control's memory image of the fields.

If DdfTransactionMode and RefreshLocations are both set to True, all manipulations of FieldList will occur within a transaction.

Example

'getting fields 
Dim fields as Variant 
VAEngine.RefreshLocations = True 
VAEngine.DdfGetFieldComments = True 
VAEngine.TableName = tableName 
fields = VAEngine.FieldList 
VAEngine.RefreshLocations = False 
If Not IsEmpty(fields) 
  For i = 0 to Ubound(fields, 2) 
    'put field names in a list box 
    List.AddItem fields(1, i) 
  Next i 
End If 
'setting 
VAEngine.RefreshLocations = False 
VAEngine.FieldList = fields 
'write changes to DDF - do not need to reset 
RefreshLocations 
VAEngine.DdfAddTable(True)

FieldList

Applies to:

Remarks

Example

See Also