How to show Master Detail fields in a single row in DBGrid

Posted on 1998-12-03
Medium Priority
Last Modified: 2010-04-04
Does anybody can show me an example
how I can show a master detail tables'
fields in one single row in DBGrid
using TTable component? They have one
to one relationship. I can't use the
TQuery component, because I have my

Question by:davichoi

Expert Comment

ID: 1349176
heh? use datasource... or what is your problem?


Expert Comment

ID: 1349177
Like zif says, add a datasource for each of your table components. Next, in the DETAIL table component set the MASTERSOURCE property to the datasource of your MASTER table.

You will also need to add the linking field to MASTERFIELDS property and the corresponding Index to INDEXNAME both of which are in the Detail table component.

Warning, if the indexname is not an index on the linking field then the tables will not behave as a master/detail relationship


Accepted Solution

forns earned 80 total points
ID: 1349178
hey, davichoi!
You need 2 TDataSources and 2 TTables not connected.
Take the fitst TTable and click on "Fields Editor..." it it's context menú. Click on "Add fields..." in the Fields Editor context menú. Add all the fields available. Right click on "New field..." in the Fields Editor context menú. Ok, what you've got to do now is adding fields assigning them a name and data type.
You can see a radio group named "Field type", choose "Lookup" and the "Lookup definition" radio group is now enabled. Now you've got to link the table your editing with the second table through their common fields and choose the fields of the second table you whant to see.
For example:
You've got a table like this [ID, Description, Size] for something and another table like [ID, price] for somethin's price, ok? If you whant to see the price in the DBGrid connected to the first Table, create a new field in the first table with this parameters:
Name: fldPrice
Component: (don't care)
Type: Integer (for example)
Size: (don't care)
Field type: lookup
Key fields: ID
Dataset: Table2
Lookup Keys: ID
Result field: price

And that's all. I hope it helps.
Anyway, it the natural way do define that 2 tables would be in just one with both's fields.

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