wpf 获取datagrid 中指定行列的DataGridTemplateColumn中的控件

        /// <summary>
        /// 获取控件
        /// </summary>
        /// <param name="control_name">控件名</param>
        /// <param name="row">行</param>
        /// <param name="col">列</param>
        private void setStar(string control_name, int row, int col = 4)
        {
            DataGridTemplateColumn templeColumn = grd_fan.Columns[col] as DataGridTemplateColumn;
            FrameworkElement s = grd_fan.Columns[col].GetCellContent(grd_fan.Items[row]);
            Button tbOper = templeColumn.CellTemplate.FindName(control_name, s) as Button;
            tbOper.Background = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#ffc400"));
        }