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cant enter data in DBGrid with Clientdataset

Posted on 2013-06-09
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Last Modified: 2013-09-12
I have an application written in Delphi7 that uses many clientdatasets that all allow me to edit fields in place in the grid when attached to a DBGrid.  I am finding out that this is not the case for Delphi 2010, XE2 or XE3. I am also in Delphi 7 editting SQL result sets attached to a DBGrid with absolutely no problems. I can not do this in 2010, XE2, XE3.  I have checked all Read Only flags in the clientdataset itself and for all the individual fielddefs and they are all false. Is there something that I am missing?

BTW: I am not using providers with my TClientdatasets .. they are all local.
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Question by:davinci1942
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by:mlmcc
ID: 39233680
Are you updating the same tables/databases?

Is each dataset a single table?

mlmcc
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by:davinci1942
ID: 39249074
each grid is a single table. Essentially each DBGrid is hooked to a Datasource pointing to a single clientdataset or a sing query.
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by:mlmcc
ID: 39249095
You say single dataset or query.  Not necessarily the same as a single table.

Are the datasets made from more than 1 table or does the query use more than 1 table?

mlmcc
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by:davinci1942
ID: 39249120
It only uses one clientdataset.  In the query version it only uses one query.
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by:mlmcc
ID: 39249266
That is not what I am asking.

What is the query?
What are the tables behind the dataset.

mlmcc
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by:davinci1942
ID: 39249391
The table behind the query is a dbisam table, ie Tdbisamtable The query that i am using is a Tdbisamquery. When i use a client daraset, ithe table is a Tclientdataset.
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by:mlmcc
ID: 39249414
I asked because if you have more than 1 table in the dataset or the query, the recordset it produces might not be updateable since there potntailly are more than 1 record.

Do you include the primary key in the recordset?
If not, you need to that way there is only 1 record for that line in the grid.

mlmcc
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davinci1942 earned 0 total points
ID: 39260572
I answered this question myself. The problem was not with the grid, tables, clientdatasets, etc., it was with the datasource. The autoedit property was set to false.
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