View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0033160||Lazarus||LCL||public||2018-02-12 16:00||2018-08-28 11:47|
|Reporter||Giovanni Seara||Assigned To||wp|
|Status||closed||Resolution||no change required|
|Summary||0033160: Selected item in TDBComboBox when TDataSet are browse|
|Description||If TDataSet is navigated and the value of a TField is changed through a TDBComboBox, the state of the TDataSet changes to edit, but the value of the TField is not modified.|
It has been identified that the problem is related to the RecordChange event and the TFielDataLink Reset method.
The problem is caused because when the UpdateData method of TFieldDataLink is called the variable IsModified is set to "False", so the value of the TField is not changed.
The temporary fix is to force the value of the IsModified variable to "True" when the Select method of the TDBComboBox is executed.
(...\lazarus\lcl\include\dbcombobox.inc - Line 60)
FDataLink.OnDataChange := nil;
if FDataLink.Edit then
if not FDataLink.IsModified then
|Steps To Reproduce||1 - Stay the state of TDataSet in browse.|
2 - Set the value of TField through the TDBComboBox.
3 - The state of TDataSet will be editing and the value of TField not will be modify.
|Tags||DbCtrls, lcl, TDBComboBox|
|Fixed in Revision|
|related to||0032383||resolved||Jesus Reyes||TDbComboBox has problems to set data when item changes|
|related to||0032463||closed||wp||Regression - TDBLookupComboBox raise exception|
|related to||0030587||closed||Luiz Americo||TDBComboBox – field data is not updated if combo is not focused but element is changed by mouse wheel|
|related to||0033164||resolved||Jesus Reyes||Start editing in DataSet through DBComboBox, application closes automatically|
Bug TDBComboBox.zip (2,502 bytes)
I can confirm on Laz 1.8, but not on Laz-trunk. The issue probably has been fixed for one of the reports mentioned in the relationships.
Can you test on trunk or 1.8-fixes (I am rather sure that the fix has been backported)
||I tested with the 56884 revision and it was actually fixed.|
||Resolving as "No change required". Please close.|
|2018-02-12 16:00||Giovanni Seara||New Issue|
|2018-02-12 16:00||Giovanni Seara||File Added: Bug TDBComboBox.zip|
|2018-02-12 16:04||Giovanni Seara||Tag Attached: DbCtrls|
|2018-02-12 16:04||Giovanni Seara||Tag Attached: lcl|
|2018-02-12 16:04||Giovanni Seara||Tag Attached: TDBComboBox|
|2018-02-12 17:51||wp||Assigned To||=> wp|
|2018-02-12 17:51||wp||Status||new => assigned|
|2018-02-12 17:53||wp||Relationship added||related to 0032383|
|2018-02-12 17:57||wp||Relationship added||related to 0029595|
|2018-02-12 17:58||wp||Relationship added||related to 0032463|
|2018-02-12 17:58||wp||Relationship deleted||related to 0029595|
|2018-02-12 18:00||wp||Relationship added||related to 0030587|
|2018-02-12 18:06||wp||Note Added: 0106354|
|2018-02-12 21:45||Giovanni Seara||Note Added: 0106359|
|2018-02-12 22:11||wp||LazTarget||=> -|
|2018-02-12 22:11||wp||Note Added: 0106361|
|2018-02-12 22:11||wp||Status||assigned => resolved|
|2018-02-12 22:11||wp||Resolution||open => no change required|
|2018-02-19 20:07||Giovanni Seara||Status||resolved => closed|
|2018-08-28 11:47||wp||Relationship added||related to 0033164|