如何在C#中合并PDF文件时消除垂直空格？

如何删除合并时的空格

此代码有效地合并了三个 PDF 字节数组。但是，生成的文档在每个页面上都显示垂直空白，使其显示为单独的页面。以下是消除此空格的方法：

C# 实现（已更新）

public class PdfVeryDenseMergeTool
{
    private Rectangle PageSize;
    private float TopMargin;
    private float BottomMargin;
    private float Gap;
    private Document Document = null;
    private PdfWriter Writer = null;
    private float YPosition = 0;

    public PdfVeryDenseMergeTool(Rectangle size, float top, float bottom, float gap)
    {
        this.PageSize = size;
        this.TopMargin = top;
        this.BottomMargin = bottom;
        this.Gap = gap;
    } // PdfVeryDenseMergeTool

    public void Merge(MemoryStream outputStream, List<pdfreader> inputs)
    {
        try
        {
            this.OpenDocument(outputStream);

            foreach (PdfReader reader in inputs)
            {
                this.Merge(reader);
            } // foreach of the PDF files to merge
        }
        finally
        {
            this.CloseDocument();
        } // try-catch-finally
    } // Merge

    public void OpenDocument(MemoryStream outputStream)
    {
        this.Document = new Document(PageSize, 36, 36, this.TopMargin, this.BottomMargin);
        this.Writer = PdfWriter.GetInstance(Document, outputStream);

        this.Document.Open();
        this.NewPage();
    } // OpenDocument

    public void CloseDocument()
    {
        try
        {
            this.Document.Close();
        }
        finally
        {
            this.Document = null;
            this.Writer = null;
            this.YPosition = 0;
        } // try-finally
    } // CloseDocument

    public void NewPage()
    {
        this.Document.NewPage();
        this.YPosition = PageSize.GetTop(this.TopMargin);
    } // Merge

    public void Merge(PdfReader reader)
    {
        PdfReaderContentParser parser = new PdfReaderContentParser(reader);

        for (int pageIndex = 1; pageIndex  0)
        {
            if (!first)
                this.NewPage();

            float freeSpace = this.YPosition - PageSize.GetBottom(BottomMargin);
            int endFlip = startFlip + 1;

            while ((endFlip > 1) && (finder.VerticalFlips[startFlip] - finder.VerticalFlips[endFlip - 2] <p><strong>PageVerticalAnalyzer 类：</strong></p><pre class="brush:php;toolbar:false">public class PageVerticalAnalyzer : IRenderListener
{
    public PageVerticalAnalyzer() { }

    public List<float> VerticalFlips = new List<float>();

    public void AddVerticalUseSection(float from, float to)
    {
        if (to  i)
            VerticalFlips.RemoveAt(j); // This was the problem line with just .Remove(j)
        if (toOutsideInterval)</float></float>

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