Why CellClick event does not fire when SelectionChanged event in DataGridView?

Question

dataGridView1_SelectionChanged event fire when i select a row but dataGridView1_CellClick event is not firing. I am using one grid only.

private void mgInvoice_SelectionChanged(object sender, EventArgs e)
        {
            if (this.IsFlagForShowImage)
            {
                ////If show image flag is true then only show images for invoices.
                try
                {
                    if (this.mgInvoice.SelectedRows != null)
                    {
                        if (this.mgInvoice.SelectedRows.Count > 0)
                        {
                            invoice = this.mgInvoice.SelectedRows[0].DataBoundItem as TAPInvoice;

                        Thread th = new Thread(new ThreadStart(LoadDocumentIdByInvoice));
                        th.Start();

                        this.ShowInvoiceImageDocumentByDocId(this.invoice);
                        IsModifiedCollection = true;

                        //Zahid
                        this.SetPriviliges();
                    }
                }
            }
            catch
            {
                throw;
            }
            finally
            {

            }
        }
    }

the above event fire correctly. but below mention event does not fire.

private void mgInvoice_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (this.mgInvoice.Columns["FImagesReviewed"].Visible)
            {
                this.mgInvoice.Columns["FImagesReviewed"].Visible = true;

            }
        else if (this.mgInvoice.Columns["FImagesApproved"].Visible)
        {
            this.mgInvoice.Columns["FImagesApproved"].Visible = true;
        }
    }

Answer 1

I had the same problem. There was an assignment to the CurrentCell of the DataGridView in the SelectionChanged event handler:

_DataGridView.CurrentCell = cellToSelect;

After I removed this assignment the CellClick event was fired again.