C# 用于3k+的PDFSharp/Migradoc PDF生成；排得非常慢

我正在尝试生成一个包含3500条记录的PDF文件。大约需要5-10分钟。这简直荒谬。我是不是遗漏了什么？它卡在

RenderDocument（）

方法上。我使用的是

MigraDoc.Rendering.dll

和

PdfSharp.dll

1.32版

这是我的一段代码。。也许我可以在构建PDF的过程中优化一些东西？我用这段代码生成的其他PDF会立即创建大约50条记录

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MigraDoc.DocumentObjectModel;
using MigraDoc.DocumentObjectModel.Tables;
using MigraDoc.DocumentObjectModel.Shapes;
using MigraDoc.Rendering;
using System.Diagnostics;

namespace Migradoc_PDF_Example
{
    class PDFGenerator
    {
        Document document;
        public void BuildAndOpenPDF()
        {
            //Argument = true if unicode
            PdfDocumentRenderer pdfRenderer = new PdfDocumentRenderer(true); 

            // Set the MigraDoc document
            pdfRenderer.Document = document;

            // Create the PDF document
            pdfRenderer.RenderDocument();
            pdfRenderer.Save("ExamplePDF.pdf");

            //Let's create a process to open our generated PDF
            Process p = new Process(); 
            p.StartInfo = new ProcessStartInfo("ExamplePDF.pdf");
            p.Start(); //Open PDF
        }
        public PDFGenerator() //In this example, the class constructor will set up the document and BuildAndOpenPDF will build the file/open it
        {
            //Actually generate invoice document.. everything before this is getting the data built together before actually writing to the pdf
            document = new Document();
            document.Info.Title = "DOCUMENT TITLE";
            document.Info.Subject = "DOCUMENT SUBJECT";
            document.Info.Author = "Me";

            // Get the predefined style Normal.
            Style style; //Creates style variable so we can change the different styles in the document as seen below..
            style = document.Styles["Normal"]; //The normal style = default for everything
            style.Font.Name = "Times New Roman"; //Default normal Font Type to Times New Roman

            style = document.Styles[StyleNames.Header]; //Style for Header of document
            style.ParagraphFormat.AddTabStop("16cm", TabAlignment.Right);

            style = document.Styles[StyleNames.Footer]; //Style for footer of document
            style.ParagraphFormat.AddTabStop("8cm", TabAlignment.Center);

            // Create a new style called Table based on style Normal
            style = document.Styles.AddStyle("Table", "Normal");
            style.Font.Name = "Times New Roman";
            style.Font.Size = 9;

            // Create a new style called Reference based on style Normal
            style = document.Styles.AddStyle("Reference", "Normal");
            style.ParagraphFormat.SpaceBefore = "5mm";
            style.ParagraphFormat.SpaceAfter = "5mm";
            style.ParagraphFormat.TabStops.AddTabStop("16cm", TabAlignment.Right);

            // Create a new style called TextBox based on style Normal
            style = document.Styles.AddStyle("TextBox", "Normal");
            style.ParagraphFormat.Borders.Width = 2.5;
            style.ParagraphFormat.Borders.Distance = "3pt";
            style.ParagraphFormat.Shading.Color = Colors.SkyBlue;

            // Each MigraDoc document needs at least one section.
            Section section = document.AddSection();

            // Create TextFrame to store the text at the top (inside the borderFrame)
            TextFrame addressFrame;
            addressFrame = section.AddTextFrame(); //add this TextFrame to our section in the document
            addressFrame.Height = "1.5cm";  //12 Pt Font  = 0.5cm  so 3 lines = 1.5cm
            addressFrame.Width = "14cm"; //16 cm width - 1 inch left indention - 1 inch right indention = 14cm
            addressFrame.Left = "1cm";
            addressFrame.Top = "1.0cm";
            addressFrame.RelativeVertical = RelativeVertical.Page;
            addressFrame.LineFormat.Width = "1pt"; //Border pixel width = 1pt
            addressFrame.LineFormat.Color = Colors.Black; //Border color = black

            Paragraph addressinfo = addressFrame.AddParagraph(); //Add paragraph to addressFrame to store text
            addressinfo.Format.Alignment = ParagraphAlignment.Center; //Align paragraph in center
            addressinfo.AddFormattedText("LINE 1 EX.\n", TextFormat.Bold);
            addressinfo.AddFormattedText("LINE 2 EX.\n", TextFormat.Bold);
            addressinfo.AddFormattedText("LINE 3 EX.\n", TextFormat.Bold);
            addressinfo.Format.Font.Name = "Times New Roman";
            addressinfo.Format.Font.Size = 12;
            addressinfo.Format.SpaceAfter = 0;

            Paragraph Spacing = section.AddParagraph(); //Space between top and datagrid
            Spacing.Format.SpaceAfter = "4cm";

            /**************************************************************************************
             *                                  TABLE LOGIC BELOW
             *                                                                                   */
            //Next is all the crap for the table below
            Table table = section.AddTable();
            table.Style = "Table"; //Use the table style we created above
            table.Borders.Color = new Color(81, 125, 192); //Red, Green, Blue
            table.Borders.Width = 0.25;
            table.Borders.Left.Width = 0.5;
            table.Borders.Right.Width = 0.5;
            table.Rows.LeftIndent = 0;

            decimal tableWidth = 0.0M; //Used so we can center the table properly

            //Before adding any rows, we must add our columns
            Column column = table.AddColumn("1.0cm"); //ID Column
            tableWidth += 1.0M; //Required for table center to be properly calculated
            column.Format.Alignment = ParagraphAlignment.Left;

            column = table.AddColumn("1.0cm"); //Another Column
            tableWidth += 1.0M; //Required for table center to be properly calculated
            column.Format.Alignment = ParagraphAlignment.Left;

            column = table.AddColumn("1.0cm"); //Another Column
            tableWidth += 1.0M; //Required for table center to be properly calculated
            column.Format.Alignment = ParagraphAlignment.Left;

            column = table.AddColumn("1.0cm"); //Another Column
            tableWidth += 1.0M; //Required for table center to be properly calculated
            column.Format.Alignment = ParagraphAlignment.Left;

            column = table.AddColumn("1.0cm"); //Another Column
            tableWidth += 1.0M; //Required for table center to be properly calculated
            column.Format.Alignment = ParagraphAlignment.Left;

            column = table.AddColumn("1.0cm"); //Another Column
            tableWidth += 1.0M; //Required for table center to be properly calculated
            column.Format.Alignment = ParagraphAlignment.Left;

            table.Rows.LeftIndent = ((16 - tableWidth) / 2).ToString() + "cm"; //Use this to center the table - Note: Max table width = 16CM

            //Create Header Row for the table
            Row row = table.AddRow();
            row.HeadingFormat = true;
            row.Format.Alignment = ParagraphAlignment.Center;
            row.Format.Font.Bold = true;
            row.Shading.Color = new Color(235, 240, 249); //Red Green Blue
            row.Cells[0].AddParagraph("ID");
            row.Cells[0].Format.Alignment = ParagraphAlignment.Left;
            row.Cells[1].AddParagraph("poopy");
            row.Cells[1].Format.Alignment = ParagraphAlignment.Left;
            row.Cells[2].AddParagraph("butt");
            row.Cells[2].Format.Alignment = ParagraphAlignment.Left;
            row.Cells[3].AddParagraph("randall");
            row.Cells[3].Format.Alignment = ParagraphAlignment.Left;
            row.Cells[4].AddParagraph("jim");
            row.Cells[4].Format.Alignment = ParagraphAlignment.Left;
            row.Cells[5].AddParagraph("duh");
            row.Cells[5].Format.Alignment = ParagraphAlignment.Left;
            table.SetEdge(0, 0, 6, 1, Edge.Box, BorderStyle.Single, 0.75, Color.Empty); //This is to draw box around header row, arguments are weird, only change 3rd argument to # of columns

            //Now let's add our fake data
            for (int i=0; i<3600; i++)
            {
                Row newRow = table.AddRow();
                //ID Column [0]
                newRow.Cells[0].Format.Alignment = ParagraphAlignment.Left;
                newRow.Cells[0].AddParagraph("ID#"+i.ToString()); //Ex. ID#1 ID#2
                //Another Column [1]
                newRow.Cells[1].Format.Alignment = ParagraphAlignment.Left; 
                newRow.Cells[1].AddParagraph("test1"); 
                                                      //Amount Column [1]
                newRow.Cells[2].Format.Alignment = ParagraphAlignment.Left; 
                newRow.Cells[2].AddParagraph("test2"); 

                //Another Column [1]
                newRow.Cells[3].Format.Alignment = ParagraphAlignment.Left; 
                newRow.Cells[3].AddParagraph("test3"); 

                //Another Column [1]
                newRow.Cells[4].Format.Alignment = ParagraphAlignment.Left; 
                newRow.Cells[4].AddParagraph("test4"); 

                //Another Column [1]
                newRow.Cells[5].Format.Alignment = ParagraphAlignment.Left; 
                newRow.Cells[5].AddParagraph("test5"); 
            }

            // Create footer
            Paragraph footer = section.Footers.Primary.AddParagraph();
            footer.AddText("Created by Me " + DateTime.Now.Year.ToString());
            footer.Format.Font.Size = 8;
            footer.Format.Alignment = ParagraphAlignment.Center;
        }

    }
}

使用系统；
使用System.Collections.Generic；
使用System.Linq；
使用系统文本；
使用System.Threading.Tasks；
使用MigraDoc.DocumentObjectModel；
使用MigraDoc.DocumentObjectModel.Tables；
使用MigraDoc.DocumentObjectModel.Shapes；
使用文档渲染；
使用系统诊断；
名称空间：doc\u PDF\u示例
{
类PDF发生器
{
文件；
public void BuildAndOpenPDF（）
{
//参数=如果为unicode，则为true
PdfDocumentRenderer pdfRenderer=新的PdfDocumentRenderer（true）；
//设置文档的名称
pdfRenderer.Document=文档；
//创建PDF文档
pdfRenderer.RenderDocument（）；
pdfRenderer.Save（“ExamplePDF.pdf”）；
//让我们创建一个过程来打开生成的PDF
过程p=新过程（）；
p、 StartInfo=新流程StartInfo（“ExamplePDF.pdf”）；
p、 Start（）；//打开PDF
}
public PDFGenerator（）//在本例中，类构造函数将设置文档，BuildAndOpenPDF将构建/打开该文件
{
//实际生成发票文档。在此之前的所有工作都是在实际写入pdf之前将数据构建在一起
文件=新文件（）；
document.Info.Title=“文档标题”；
document.Info.Subject=“文档主题”；
document.Info.Author=“我”；
//使预定义的样式正常。
Style Style；//创建样式变量，以便我们可以更改文档中的不同样式，如下所示。。
style=document.Styles[“Normal”]；//Normal style=所有内容的默认样式
style.Font.Name=“Times New Roman”；//默认正常字体类型为Times New Roman
style=document.style[StyleNames.Header]；//文档头的样式
style.ParagraphFormat.AddTabStop（“16cm”，TabAlignment.Right）；
style=document.style[StyleNames.Footer]；//文档页脚的样式
style.ParagraphFormat.AddTabStop（“8cm”，TabAlignment.Center）；
//基于“常规样式”创建名为“表格”的新样式
style=document.Styles.AddStyle（“表”、“正常”）；
style.Font.Name=“泰晤士报新罗马”；
style.Font.Size=9；
//基于样式“法线”创建名为“参照”的新样式
style=document.Styles.AddStyle（“参考”、“正常”）；
style.ParagraphFormat.SpaceBefore=“5mm”；
style.ParagraphFormat.SpaceAfter=“5mm”；
style.ParagraphFormat.TabStops.AddTabStop（“16cm”，TabAlignment.Right）；
//基于常规样式创建名为TextBox的新样式
style=document.Styles.AddStyle（“文本框”、“普通”）；
style.ParagraphFormat.Borders.Width=2.5；
style.ParagraphFormat.Borders.Distance=“3pt”；
style.ParagraphFormat.Shading.Color=Colors.SkyBlue；
//每个文档至少需要一个部分。
Section=document.AddSection（）；
//创建文本框以将文本存储在顶部（边框框内）
文本框地址框；
addressFrame=section.AddTextFrame（）；//将此TextFrame添加到文档中的节中
addressFrame.Height=“1.5cm”//12 Pt Font=0.5cm所以3行=1.5cm
addressFrame.Width=“14cm”//16厘米宽-1英寸左缩进-1英寸右缩进=14cm
addressFrame.Left=“1cm”；
addressFrame.Top=“1.0cm”；
addressFrame.RelativeVertical=RelativeVertical.Page；
addressFrame.LineFormat.Width=“1pt”//边框像素宽度=1pt
addressFrame.LineFormat.Color=Colors.Black；//边框颜色=Black
段落地址信息=addressFrame.AddParague（）；//将段落添加到addressFrame以存储文本
addressinfo.Format.Alignment=ParagraphAlignment.Center；//在中间对齐段落
addressinfo.AddFormattedText（“第1行EX.\n”，TextFormat.Bold）；
addressinfo.AddFormattedText（“第2行EX.\n”，TextFormat.Bold）；
addressinfo.AddFormattedText（“第3行EX.\n”，TextFormat.Bold）；
addressinfo.Format.Font.Name=“Times New Roman”；
addressinfo.Format.Font.Size=12；
addressinfo.Format.SpaceAfter=0；
段落间距=section.addparagration（）；//顶部和数据网格之间的间距
Spacing.Format.SpaceAfter=“4cm”；
/**************************************************************************************
*下表逻辑
*                                                                                   */
//下一步是下表的所有垃圾
Table Table=section.AddTable（）；
table.Style=“table”//使用上面创建的表格样式
table.Borders.Color=新颜色（81125192）；//红、绿、蓝
表1.1.1宽度=0.25；
table.Borders.Left.Width=0.5；
table.Borders.Right.Width=0.5；
table.Rows.LeftIndent=0；
decimal tableWidth=0.0M；//用于使表格正确居中
//在添加任何行之前，我们必须添加列
纵队
    public void RenderObject(DocumentRenderer docRenderer, XUnit xPosition, XUnit yPosition, XUnit width, DocumentObject documentObject, XGraphics currentGfx)
    {
        // we risk to cause an exception in order to call the time consuming function PrepareDocument as few times as possible
        try
        {
            docRenderer.RenderObject(currentGfx, xPosition, yPosition, width, documentObject);
        }
        catch
        {
            docRenderer.PrepareDocument();
            docRenderer.RenderObject(currentGfx, xPosition, yPosition, width, documentObject);
        }
    }