在IIS上绘制的PdfSharp条形码128会产生符号间隙

我需要用pdf中的代码128字体绘制条形码，所以我使用的是PdfSharp库 . PDF格式的条形码如下所示：

XFont BarcodeFont = new XFont("Code 128", 40, XFontStyle.Regular);

tf.Alignment = XParagraphAlignment.Center;
XRect barecodeLabel = new XRect(new XPoint(leftMargin, rectanglesPadding), new XSize(page.Width - rightMargin, BarcodeFont.Height + 10));
tf.DrawString(PrepareBarcode(item.ItemNo_), BarcodeFont, XBrushes.Black, barecodeLabel, XStringFormats.TopLeft);
rectanglesPadding += barecodeLabel.Height - XUnit.FromPoint(5.0);

准备条形码数据：

private string PrepareBarcode(string itemNo)
    {
        int sumControl = SumControl(itemNo);
        string kod = "";
        kod += (char)209;
        kod += itemNo;

        kod += (char)sumControl;

        kod += (char)211;
        return kod;
    }

和总和控制：

private int SumControl(string input)
        {
            int sum = 0;

            for (int i = 0; i < input.Length; i++)
            {
                if (input[i] != ' ')
                {
                    int znak = (int)input[i] - 32;
                    sum += (i + 1) * ((int)input[i] - 32);
                }
            }
            sum += 104;
            int rem = Convert.ToInt32(Decimal.Remainder(sum, 103));

            if (rem < 95)
                return rem + 32;
            else
                return rem + 105;
        }

字体嵌入pdf中，pdf作为MemoryStream返回到aspx页面并刷新到浏览器：

WCF：

MigraDoc.DocumentObjectModel.Document doc = new MigraDoc.DocumentObjectModel.Document();
                MigraDoc.Rendering.DocumentRenderer renderer = new DocumentRenderer(doc);
                MigraDoc.Rendering.PdfDocumentRenderer pdfRenderer = new MigraDoc.Rendering.PdfDocumentRenderer(true, PdfFontEmbedding.Always);
                pdfRenderer.PdfDocument = document;
                pdfRenderer.DocumentRenderer = renderer;
                using (MemoryStream ms = new MemoryStream())
                {
                    pdfRenderer.Save(ms, false);
                    byte[] buffer = new byte[ms.Length];
                    ms.Seek(0, SeekOrigin.Begin);
                    ms.Flush();
                    ms.Read(buffer, 0, (int)ms.Length);
                    return ms;
                }

和Aspx页面：

try
            {
                zebexService = new SERVICES.NAV.WAREHOUSE.ZEBEX.ZebexClient();
                zebexService.Open();
                var wampirUserId = HttpContext.Current.GetWampirID();
                System.IO.MemoryStream stream = zebexService.PrintBarcodeLabels(wampirUserId, itemToPrintList);
                zebexService.Close();

                HttpContext.Current.Response.Clear();
                HttpContext.Current.Response.ContentType = "application/pdf";
                HttpContext.Current.Response.ContentEncoding = Encoding.UTF8;
                HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment; filename=Druk etykiet:" + DateTime.Now.ToString("yy/mm/dd-hh:mm") + "_" + wampirUserId + ".pdf");

                HttpContext.Current.Response.BinaryWrite(stream.ToArray());
                HttpContext.Current.Response.Flush();
                stream.Close();
                HttpContext.Current.Response.End();
                Response.BinaryWrite(stream.ToArray());
                Response.Flush();
            }

当我在localhost（windows 10，asp.net开发服务器，lang.PL）上绘制它时，它绘制正确：

![[Correctly drawed barcode in pdf on localhost]]](https://i.stack.imgur.com/1YhTn.png)

但当我使用Windows Server 2012R2将代码（WCF）移动到IIS服务器时，lang . 英语安装相同的字体（code128.ttf），我得到条码与字符之间的大差距：

我该怎么做才能消除这个问题？