为什么不应用我的背景色（Aspose Cells）？

我正在尝试为单元格的背景添加颜色，如下所示：

style.BackgroundColor = Color.LightBlue;
style.Pattern = BackgroundType.Solid;

在更多情况下：

Cell shortNameHeaderCell = locationWorksheet.Cells[BYDCBYLOC_HEADING_ROW, SHORTNAME_BYDCBYLOC_COL];
shortNameHeaderCell.PutValue("Short Name");
style = cf.CreateStyle();
style.HorizontalAlignment = TextAlignmentType.Left;
style.VerticalAlignment = TextAlignmentType.Center;
style.Font.Name = fontForSheets;
style.Font.IsBold = true;
style.Font.Size = 12;
style.BackgroundColor = Color.LightBlue;
style.Pattern = BackgroundType.Solid;
shortNameHeaderCell.SetStyle(style);

Cell companyNameHeaderCell = locationWorksheet.Cells[BYDCBYLOC_HEADING_ROW, COMPANYNAME_BYDCBYLOC_COL];
companyNameHeaderCell.PutValue("Company Name");
companyNameHeaderCell.SetStyle(style);

Cell reasonDescHeaderCell = locationWorksheet.Cells[BYDCBYLOC_HEADING_ROW, REASONDESC_BYDCBYLOC_COL];
reasonDescHeaderCell.PutValue("Reason Description");
reasonDescHeaderCell.SetStyle(style);

Cell transTypeHeaderCell = locationWorksheet.Cells[BYDCBYLOC_HEADING_ROW, TRANSTYPE_BYDCBYLOC_COL];
transTypeHeaderCell.PutValue("Transaction Type");
style = cf.CreateStyle();
style.HorizontalAlignment = TextAlignmentType.Center;
style.Font.Name = fontForSheets;
style.Font.IsBold = true;
style.Font.Size = 12;
style.IsTextWrapped = true;
style.BackgroundColor = Color.LightBlue;
style.Pattern = BackgroundType.Solid;
transTypeHeaderCell.SetStyle(style);

Cell sumOfQtyOrdHeaderCell = locationWorksheet.Cells[BYDCBYLOC_HEADING_ROW, QTYORD_BYDCBYLOC_COL];
sumOfQtyOrdHeaderCell.PutValue("Sum of Qty Ord");
sumOfQtyOrdHeaderCell.SetStyle(style);

Cell sumOfQtyShippedHeaderCell = locationWorksheet.Cells[BYDCBYLOC_HEADING_ROW, QTYSHIPPED_BYDCBYLOC_COL];
sumOfQtyShippedHeaderCell.PutValue("Sum of Qty Shipped");
sumOfQtyShippedHeaderCell.SetStyle(style);

但是，未应用浅蓝色：

不过，正在发生某些事情，因为看起来像包围单元格的垂直线的中间部分已被删除。我不知道为什么，或者不知道与浅蓝色难以忍受的联系如何。在添加该代码之前（第一个摘要），这些污迹/擦除是不可见的。