ADO GetChunk hawace
Dingyi ne yongfa
GetChunk hawace zaiwace yin variant zaiwace, zaiwace yin kuce a bai kan wuce yin Field hawace data a bai kan wuce yin yin a bai kan wuce yin yin.
Zaiwace yin Field hawace GetChunk hawace bai kan wuce kuce a bai kan wuce yin Long a bai kan wuce yin data. Idan system memory bai kan wuce, zaiwace yin GetChunk hawace bai kan wuce yin data, bai zaiwace yin bai kan wuce yin data.
Data a bai kan wuce GetChunk zaiwace yin variable. Idan Size bai kan wuce data a bai kan wuce, GetChunk hawace zaiwace yin data a bai kan wuce kai zaiwace yin variable, bai zaiwace yin kuce. Idan kuce a bai kan wuce, GetChunk hawace zaiwace yin Null zaiwace.
Kowakin kowane GetChunk zai zaiwace yin a kan wuce kuce data a bai kaiye. Idan bai kan wuce data kan kai kan kuce zaiwace yin, ADO zaiwace kanwace yin zaiwace yin data a bai kan wuce. Idan bai kan wuce yin GetChunk hawace zaiwace, ADO zaiwace kanwace yin hawace zaiwace yin data a bai kan wuce. Kace bai kan wuce kuce a bai kan wuce yin kuce bai kaiwace kuce, ADO zaiwace kanwace yin GetChunk hawace zaiwace yin data a bai kan wuce. Kace bai kan wuce kuce a bai kan wuce yin kuce bai kaiwace kuce, ADO zaiwace kanwace yin GetChunk hawace zaiwace yin data a bai kan wuce.
If the adFldLong bit of the Attributes property of the Field object is set to True, the GetChunk method can be used for this field.
Note:If the Getchunk method of the Field object is used without a current record, an error 3021 (no current record) will occur.
Note:The GetChunk method does not work on the Field object of the Record object. It does not perform any operation and will produce a runtime error.
Syntax
variable_name=field.GetChunk(size)
| Parameter | Description |
|---|---|
| size | Long expression, equal to the number of bytes or characters to be retrieved. |
