wpf datagrid row height 行高自动计算使每行行高自适应文本

 private void dgList_LoadingRow(object sender, DataGridRowEventArgs e)
        {
            e.Row.Height = 30;
            //粗略计算行高。为了更好的显示效果
           ContentInfo info = (ContentInfo)e.Row.DataContext;
            if (info != null)
            {
                //计算最大长度的文本
                string maxLengthString = info.name1.Length > info.name2.Length ? info.name1: info.name2;
                //获取换行文本的文本框宽度，即template里面的textbox或textblock的实际宽度
                double textBoxWidth = (this.ActualWidth - 300) / 2;
                 
                var formattedText = new FormattedText(
    maxLengthString ,
    CultureInfo.CurrentUICulture,
    FlowDirection.LeftToRight,
    new Typeface(new FontFamily("微软雅黑"), FontStyles.Normal, FontWeights.Normal, FontStretches.Normal),
    12,
    Brushes.Black);

                double calculateHeight = formattedText.Height * (formattedText.Width / textBoxWidth);
                e.Row.Height = 30 > calculateHeight ? 30 : calculateHeight;
            }
        }