之前想使用DataGridView的SelectionChanged事件，但是使用了後並沒有達到效果

最後使用下面的方式實現：

private void materialCheckGridView_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
    int cidx = materialCheckGridView.CurrentCell.ColumnIndex;
    if (materialCheckGridView.Columns[cidx].Name == "
 
ColRetMainDefect")
    {
        //還原控件並綁定事件
        ((ComboBox)e.Control).SelectedIndexChanged += new EventHandler(MaterialCheckForm_SelectedIndexChanged);
    }
}

private void MaterialCheckForm_SelectedIndexChanged(object sender, EventArgs e)
{
    int cindex = materialCheckGridView.CurrentRow.Index;
    
 
if (cindex >= 0)
    {
        int idx = materialCheckGridView.CurrentCell.ColumnIndex;
        if (materialCheckGridView.Columns[idx].HeaderText == "回修主要病疵")
        {
            //int cindex = materialCheckGridView.CurrentCell.RowIndex;
            string defdesc = ProdReportDA.GetDefectsDescription(materialCheckGridView.Rows[cindex].Cells["
 
ColRetMainDefect"].EditedFormattedValue.ToString(), materialCheckGridView.Rows[cindex].Cells["RollId"].Value.ToString());
            materialCheckGridView.Rows[cindex].Cells["ColDefectDesc"].Value = defdesc;
        }
    }
}

winform datagridview中combobox列改變選項時觸發其他列變化