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Ticket Q581672
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Duplicate

We have closed this ticket because another page addresses its subject:

TcxDBTreeList - The "EDatabase error" exception occurs when opening a bound dataset and populating it with data within the BeginUpdate/EndUpdate block

TcxDBTreeList - The "EDatabase error" exception occurs when editing data of a bound dataset within the BeginUpdate/EndUpdate block

created 11 years ago

Hello.
I use a DxMemDataSet which is bound to a TcxDBTreeList.
When editing values of the DataSet within a BeginUpdate/EndUpdate block an exception "DataSet not in edit or insert mode" is thrown.
Attached is a demo app demonstrating the problem.
Regards,
Torsten Lang

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Answers approved by DevExpress Support

created 11 years ago (modified 11 years ago)

This issue seems to be caused by the incorrect fixing of the TcxDBTreeList - The "EDatabase error" exception occurs when opening a bound dataset and populating it with data within the BeginUpdate/EndUpdate block problem. I have posted the modified (correct) hotfix code there, so please download the patch from TcxDBTreeList - The "EDatabase error" exception occurs when opening a bound dataset and populating it with data within the BeginUpdate/EndUpdate block and apply it to VCL 13.2.4. This should solve the problem.

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    created 11 years ago (modified 11 years ago)

    Hello Torsten,
    This problem occurs because of the fix from the Q574440 thread.
    This problem will be fixed in the frames of the Q580604: FocusedNode not working when DataSet is set at runtime. ticket. So I've marked this ticket as duplicated.

      Comments (1)
      DevExpress Support Team 11 years ago

        Follow-up:
        In addition, I suggest you use the DataSet's DisableControls/EnableControls methods instead of TreeList's BeginUpdate/EndUpdate ones. This will help you avoid this error, prevent DataSet notifications to TreeList and improve the performance.

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