DataGridView.CellValueChanged not firing on bound DataGridView

Question

When I change a value programatically in a DataTable that my DataGridView is bound to, the appropriate CellValueChanged event is not firing for the DataGridView. I'm trying to change a cell's background color based on cell value when the DataTable is filled with data without iterating through every row and checking each value.

Answer 1

You are changing the DataTable directly and expect DataGridView 's event to be fired? I suggest that you change the cell value programatically as:

DataGridView[ColumnIndex, RowIndex].Value = NewValue;

Additionally you will have to Call DataGridView.CommitEdit() to commit the values to the DataTable . This should trigger the CellValueChanged event.

http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.cellvaluechanged.aspx

Answer 2

应在RowPrePaint-Event中更改单元格背景颜色，如果在值更改后重新绘制行，则会触发此操作。