How to abort unchecking item at checkedlistbox?

Question

I have a method:

foreach (DataGridViewColumn column in dgvGeoObjectsFirstView.Columns)
            {
                geoObjectsColumnsCheckedListBoxFirstView.Items.Add(column.HeaderText, column.Visible);
                geoObjectsColumnsCheckedListBoxFirstView.ItemCheck += (ss, ee) =>
                {
                    if (geoObjectsColumnsCheckedListBoxFirstView.SelectedItem != "Show")
                    {
                        if (geoObjectsColumnsCheckedListBoxFirstView.SelectedItem != null)
                        {
                            var selectedItem = geoObjectsColumnsCheckedListBoxFirstView.SelectedItem.ToString();

                            foreach (DataGridViewColumn column2 in dgvGeoObjectsFirstView.Columns)
                            {
                                if (column2.HeaderText == selectedItem.ToString())
                                {
                                    column2.Visible = ee.NewValue == CheckState.Checked;
                                }
                            }
                            int currentDisplayIndex = 0;

                            foreach (DataGridViewColumn dataGridViewColumn in dgvGeoObjectsFirstView.Columns)
                            {
                                if (dataGridViewColumn.HeaderText == selectedItem)
                                {
                                    currentDisplayIndex = dataGridViewColumn.Index;
                                }
                            }



                            int futureDisplayIndex = geoObjectsColumnsCheckedListBoxFirstView.SelectedIndex;

                            PassColumnsInFirstView(futureDisplayIndex, currentDisplayIndex);
                        }
                    }
                    else
                    {
      //What can I do here to have item checked
                    }
                };
            }\

The problem is taht one column which header text "Show" shouldn't be uncheckable, so I want something like aborting unchecking for this item.

Maybe some event on checkedlistbox?

Best regards

Answer 1

Make the column read-only and then you needn't fiddle with preventing it from being changed.

Otherwise, subscribe to the CellEndEdit event and set e.Cancel = true .