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Workaround for DataGridView filtering internal NullReferenceException

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This commit is contained in:
Michael Bucari-Tovo 2025-02-10 10:20:18 -07:00
parent 8ec7e5a9d2
commit e911344850
1 changed files with 27 additions and 4 deletions
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25
Source/LibationWinForms/GridView/ProductsDisplay.cs
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@ -89,12 +89,35 @@ namespace LibationWinForms.GridView
displayWindow.Show(this);
}
private void productsGrid_DetailsClicked(ILibraryBookEntry liveGridEntry)
private async void productsGrid_DetailsClicked(ILibraryBookEntry liveGridEntry)
{
// HACK: workaround for a Winforms bug.
// This event is fired by the DataGridCell.OnMouseUpInternal
// method. If any user changes made in the BookDetailsDialog
// result in the entry's row being removed from the DataGridView,
// then when this event handler returns, OnMouseUpInternal will
// throw a NRE trying to access the DataGridCell.DataGridView
// property.
//Steps to cause the bug:
// * book has tag: asdf
// * filter is `[asdf]`
// * tag asdf is removed from book
// * DataGridView throws NRE
//The workaround is to make this event handler execute
//asynchronously so that DataGridCell.OnMouseUpInternal completes
//before the user can change the DataGridView state.
await Task.Run(() => this.Invoke(runAsync));
void runAsync()
{
var bookDetailsForm = new BookDetailsDialog(liveGridEntry.LibraryBook);
if (bookDetailsForm.ShowDialog() == DialogResult.OK)
liveGridEntry.LibraryBook.UpdateUserDefinedItem(bookDetailsForm.NewTags, bookDetailsForm.BookLiberatedStatus, bookDetailsForm.PdfLiberatedStatus);
}
}
#endregion