I want to handle the event when a value is changed in a ComboBox
in a DataGridView
cell.
There's the CellValueChanged
event, but that one doesn't fire until I click somewhere else inside the DataGridView
.
A simple ComboBox
SelectedValueChanged
does fire immediately after a new value is selected.
How can I add a listener to the combobox that's inside the cell?
The above answer led me down the primrose path for awhile. It does not work as it causes multiple events to fire and just keeps adding events. The problem is that the above catches the DataGridViewEditingControlShowingEvent and it does not catch the value changed. So it will fire every time you focus then leave the combobox whether it has changed or not.
The last answer about CurrentCellDirtyStateChanged
is the right way to go. I hope this helps someone avoid going down a rabbit hole.
Here is some code:
// Add the events to listen for dataGridView1.CellValueChanged += new DataGridViewCellEventHandler(dataGridView1_CellValueChanged); dataGridView1.CurrentCellDirtyStateChanged += new EventHandler(dataGridView1_CurrentCellDirtyStateChanged); // This event handler manually raises the CellValueChanged event // by calling the CommitEdit method. void dataGridView1_CurrentCellDirtyStateChanged(object sender, EventArgs e) { if (dataGridView1.IsCurrentCellDirty) { // This fires the cell value changed handler below dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit); } } private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e) { // My combobox column is the second one so I hard coded a 1, flavor to taste DataGridViewComboBoxCell cb = (DataGridViewComboBoxCell)dataGridView1.Rows[e.RowIndex].Cells[1]; if (cb.Value != null) { // do stuff dataGridView1.Invalidate(); } }
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