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我在使用 iTexSharp 版本 5.5.7.0 的表时遇到问题。

我想建立一个按类别和子类别分组的产品目录。

我需要显示类别名称、子类别名称和其中的产品。当子类别发生变化时，我需要重复类别名称：

Category 1 
  Sub category 1
    Product 1 table 
    Product 2 table...
Category 1
  Sub category 2
    Product 1 table ...
Category 2 
  Sub category 1
    Product 1 table 
    Product 2 table...
Category 2 
  Sub category 2
    Product 1 table 
    Product 2 table
    Product 3 table...

问题是我不希望类别和子类别名称显示在页面底部，并且该子类别的第一个产品显示在下一页上。

所以我创建了一个tableContainer，在其中添加了tableCategory、tableSubCategory 和第一个tableProduct。

我将此 tabContainer 添加到文档中，然后添加一个包含剩余产品的表格。我尝试使用 KeepTogether、SplitRows 和 SplitLate 但没有成功。有时它似乎可以工作，但有些行没有显示在页面上，例如：

End of Page :
  Category  
    Sub category 
New Page :  
    Product 2 table...
    Product 3 table...

缺少产品 1 表

我的文档是带边距的 A4 尺寸：

 pdfDocument =  pdfDocument = new Document(iTextSharp.text.PageSize.A4, 20, 20, 40, 40);
 pdfWriter = PdfWriter.GetInstance(pdfDocument, new FileStream(path, fileMode));

我在文档中显示数据的方式：

PdfPTable tableContainer = CreateTable(new float[] { 100f }, false, 0f, 0f,    pdfDocument.PageSize.Width);
tableContainer.SplitRows = false;
tableContainer.KeepTogether = true;

foreach (string category in categoriesList)
{
     //Cell category
    PdfPCell cellCategory = CreateCell(category, Element.ALIGN_MIDDLE, Element.ALIGN_LEFT, "Oswald", Rectangle.NO_BORDER, 8, Font.BOLD, BaseColor.WHITE, lightBlueColor, 1, 30);


foreach (string subCategory in subCategoriesList)
{   
     //Cell sub category
    PdfPCell cellSubCategory = CreateCell(category, Element.ALIGN_MIDDLE, Element.ALIGN_LEFT, "Oswald", Rectangle.NO_BORDER, 8, Font.BOLD, BaseColor.WHITE, lightBlueColor, 1, 30);

    tableContainer.AddCell(cellCategory);
    tableContainer.AddCell(cellSubCategory);

    //table with list of products
    PdfPTable productsTable = CreateTable(new float[] { 100f }, false, 0f, 10f, pdfDocument.PageSize.Width - (pdfDocument.LeftMargin + pdfDocument.RightMargin) - 40);

    foreach (Product p in productsFilteredList)
    {
        //Create product Table
        PdfPTable productTable = CreateProductTable(pdfDocument, p);

        //If first product : category , sub category and first product must be displayed together on the same page
        if(firstProduct)
            tableContainer .AddCell(productTable);              
        else
            productsTable.AddCell(productTable); 
    }

    pdfDocument.Add(tableContainer);
    pdfDocument.Add(productsTable);
}
}


private  PdfPTable CreateProductTable(Document pdfDocument, product p)
{
PdfPTable productTable = CreateTable(new float[] { 25f, 20f, 35f, 10f, 10f }, false, 0f, 0f, pdfDocument.PageSize.Width - (pdfDocument.LeftMargin + pdfDocument.RightMargin) - 40);

PdfPCell cellImage = CreateCellImage(tempFolderPhotosPath + p.Code + ".jpeg", 50f, Element.ALIGN_MIDDLE, Element.ALIGN_CENTER, 1, Rectangle.UNDEFINED, 60f);
cellImage.PaddingLeft = 30f;
productTable.AddCell(cellImage);

productTable.AddCell(CreateCell(p.Code, Element.ALIGN_MIDDLE, Element.ALIGN_CENTER, "Oswald", Rectangle.NO_BORDER, 7, Font.BOLD, BaseColor.BLACK, backGroundColor, 1, productTable.DefaultCell.Height));
productTable.AddCell(CreateCell(p.Description, Element.ALIGN_MIDDLE, Element.ALIGN_LEFT, "Oswald", Rectangle.NO_BORDER, 8, Font.NORMAL, BaseColor.BLACK, backGroundColor, 1, productTable.DefaultCell.Height));
productTable.AddCell(CreateCell(p.Reference, Element.ALIGN_MIDDLE, Element.ALIGN_CENTER, "Oswald", Rectangle.NO_BORDER, 8, Font.BOLD, BaseColor.BLACK, backGroundColor, 1, productTable.DefaultCell.Height));
productTable.AddCell(CreateCell(p.Price , Element.ALIGN_MIDDLE, Element.ALIGN_CENTER, "Oswald", Rectangle.NO_BORDER, 8, Font.NORMAL, BaseColor.BLACK, backGroundColor, 1, productTable.DefaultCell.Height));
return productTable;
}

private  PdfPCell CreateCell(string content, int verticalAlignement, int horizontalAlignement, string fontName, int border, int fontSize, int fontStyle, BaseColor fontColor, BaseColor backgroundColor, int rowSpan, float minHeight)
{
PdfPCell cell = new PdfPCell(new Phrase(new Chunk(content, FontFactory.GetFont(fontName, fontSize, fontStyle, fontColor))));
cell.BackgroundColor = backgroundColor;
cell.HorizontalAlignment = horizontalAlignement;
cell.VerticalAlignment = verticalAlignement;
cell.Border = border;
cell.Rowspan = rowSpan;
cell.MinimumHeight = minHeight;
cell.Border = border;

return cell;
}

private  PdfPCell CreateCellImage(string pathImage, float widthPercentage, int verticalAlignement, int horizontalAlignement, int rowSpan, int border, float minHeight)
{
PdfPCell cell = new PdfPCell();
cell.HorizontalAlignment = horizontalAlignement;
cell.VerticalAlignment = verticalAlignement;
cell.Border = border;
cell.Rowspan = rowSpan;
cell.Border = Rectangle.NO_BORDER;

Image image = Image.GetInstance(pathImage);
image.ScaleToFit(widthPercentage, minHeight);

cell.MinimumHeight = minHeight + 10;
cell.AddElement(image);

return cell;
}

我需要一种链接表格并强制它们显示在同一页面上的方法。如果它不适合当前页面的剩余空间，则自动创建一个新页面。

有谁知道如何实现这一目标？谢谢。

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