[release/9.0] InvalidOperationException when closing a dialog with focused DataGridView control

[github-actions]

Backport of #13320 to release/9.0
Fixes #13304

Proposed changes

• When the DataGridView is in edit mode and the parent form is being closed, the DataGridView's EndEdit triggers the CurrentCell setting logic, because the DGV's handle has been destroyed at this time, we are re-creating it and then re-enter logic that sets up the current cell causing an exception to be thrown. Checking isHandleCreated before calling EndEdit can avoid executing related logic when the control has been destroyed, thereby preventing exceptions from occurring.

Customer Impact

• When the DataGridView is in editing mode, its dialog box can be closed normally

Regression?

• Yes, introduced in DGV throws IndexOutOfRangeException whenever its datasource is disposed (servicing) #4637

Testing

• Manual testing with the user-provided project

Risk

• Low

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.83841%. Comparing base (61ec31a) to head (c97f912).
Report is 7 commits behind head on release/9.0.

Additional details and impacted files

@@                  Coverage Diff                  @@
##           release/9.0      #13348         +/-   ##
=====================================================
+ Coverage     74.83837%   74.83841%   +0.00003%     
=====================================================
  Files             3022        3022                 
  Lines           630464      630465          +1     
  Branches         46801       46801                 
=====================================================
+ Hits            471829      471830          +1     
+ Misses          155246      155239          -7     
- Partials          3389        3396          +7     

Flag	Coverage Δ
Debug	74.83841% <100.00000%> (+0.00003%)	⬆️
integration	18.00816% <100.00000%> (-0.00290%)	⬇️
production	47.87019% <100.00000%> (+0.00018%)	⬆️
test	97.00005% <ø> (ø)
unit	44.90738% <50.00000%> (+0.02551%)	⬆️

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