Difference between revisions of "TDataSet"
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'''TDataSet''' is the main link to the actual data in a database. A TDataSet descendant acts like a cursor on a table or query-result. | '''TDataSet''' is the main link to the actual data in a database. A TDataSet descendant acts like a cursor on a table or query-result. | ||
− | <syntaxhighlight lang=pascal> | + | <syntaxhighlight lang=pascal highlight=3> |
SQLTransaction1.Database := SQLConnection1; | SQLTransaction1.Database := SQLConnection1; | ||
SQLQuery1.Transaction := SQLTransaction1; | SQLQuery1.Transaction := SQLTransaction1; | ||
− | DataSource1. | + | DataSource1.DataSet := SQLQuery1; |
DBGrid1.DataSource := DataSource1; | DBGrid1.DataSource := DataSource1; | ||
</syntaxhighlight> | </syntaxhighlight> | ||
− | A dataset (for example a query | + | A dataset (for example a query result) can be edited: |
<syntaxhighlight lang=pascal> | <syntaxhighlight lang=pascal> |
Revision as of 06:21, 29 February 2020
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TDataSet is the main link to the actual data in a database. A TDataSet descendant acts like a cursor on a table or query-result.
SQLTransaction1.Database := SQLConnection1;
SQLQuery1.Transaction := SQLTransaction1;
DataSource1.DataSet := SQLQuery1;
DBGrid1.DataSource := DataSource1;
A dataset (for example a query result) can be edited:
ds.Edit();
ds.FieldByName('NAME').AsString := 'Edited name';
ds.Post();
ds.UpdateMode := upWhereAll;
ds.ApplyUpdates();
Non-abstract descendants
- TBufDataset -
- TMemDataset -
- TSdfDataSet -
- TFixedFormatDataSet
- TDbf - connect to dBase
- TParadox - connect to Paradox/BDE
- TParadoxDataSet - connect to Paradox/BDE
- TFPCodeGenerator
- TSQLQuery - connect to results of a SQL-query
See also