[WinForms] DataGridView.CellFormatting event not raised if a tooltip is shown #15361
Description
[Change Title]
To meet accessibility standards DataGridView now shows cell's text and errors as tooltips when navigated by both mouse and keyboard (.e.g tab/arrow navigation, hotkeys).
Version introduced
3.1
Old behavior
Previously DataGridView would only show cell's tooltips and error text (if those were set) when navigated by mouse.
While editing a cell in a DataGridView that had ShowCellToolTips = true, CellFormatting event would be raised whenever other cells would be hovered and that did not have ToolTip property set.
New behavior
DataGridView now shows cell's text and errors as tooltips when navigated by both mouse and keyboard (.e.g tab/arrow navigation, hotkeys).
While editing a cell in a DataGridView that had ShowCellToolTips = true, CellFormatting is no longer raised whenever other cells are hovered because the content of hovered cells is shown as tooltip.
Reason for change
Accessibility requirements
Recommended action
Refactor the code that may have depended on CellFormatting event while DataGridView is in edit mode.
Category
- Windows Forms
Affected APIs
"Not detectable via API analysis"
Issue metadata
- Issue type: breaking-change