C# 在现有pdf内容c之后添加新段落#
我想显示后，pdf的最后一页像这张图片现有内容的段落 借助c#代码（使用任何开源pdf sdk或库） 这是我当前的代码。这是在新页面上添加文本，而不是在我的最后一页上。 我搜索并使用了大量来自互联网的代码，所有这些代码都在页面的绝对位置（wrt x，y坐标）上写入文本，这些文本与现有内容上的新文本重叠。我需要相对逻辑，在旧段落结束后追加新段落，就像我随附的照片演示一样 当前iTextSharp代码（使用此Dll:iTextSharp.Dll）C# 在现有pdf内容c之后添加新段落#,c#,pdf,itext,devexpress,C#,Pdf,Itext,Devexpress,我想显示后，pdf的最后一页像这张图片现有内容的段落 借助c#代码（使用任何开源pdf sdk或库） 这是我当前的代码。这是在新页面上添加文本，而不是在我的最后一页上。 我搜索并使用了大量来自互联网的代码，所有这些代码都在页面的绝对位置（wrt x，y坐标）上写入文本，这些文本与现有内容上的新文本重叠。我需要相对逻辑，在旧段落结束后追加新段落，就像我随附的照片演示一样 当前iTextSharp代码（使用此Dll:iTextSharp.Dll） string newparagraphText=
string newparagraphText=memoEdit1.Text；
AddCommentsToFile（@“input.pdf”，newparagraphText）；
私有静态字符串AddCommentsToFile（字符串文件名，字符串用户注释）
{
字符串outputFileName=@“Output.pdf”；
//步骤1：创建文档对象
文档=新文档（）；
尝试
{
//步骤2：我们创建一个侦听文档的编写器
PdfWriter writer=PdfWriter.GetInstance（文档，新文件流（outputFileName，FileMode.Create））；
//步骤3：打开文档
document.Open（）；
PdfContentByte cb=writer.DirectContent；
//当前文件路径
字符串文件名=文件名；
//我们为文档创建一个阅读器
PdfReader reader=新的PdfReader（文件名）；
PdfReader.unethicalreading=true；
对于（int pageNumber=1；pageNumberusing System;
using System.Collections.Generic;
using System.IO;
using Apitron.PDF.Kit.FixedLayout;
using Apitron.PDF.Kit.FixedLayout.Content;
using Apitron.PDF.Kit.FixedLayout.PageProperties;
using FixedLayout.Resources;
using FixedLayout.ContentElements;
using FlowLayout.Content;
public void AddParagraph()
{
using (Stream stream = new FileStream("file.pdf", FileMode.Open, FileAccess.ReadWrite))
{
using (FixedDocument document = new FixedDocument(stream))
{
Page page = document.Pages[0];
double minY = page.Boundary.MediaBox.Height;
foreach(IContentElement element in page.Elements)
{
if(element != null)
{
minY = Math.Min(element.Boundary.Bottom, minY);
}
}
TextBlock textBlock = new TextBlock("I want to show new paragraph here")
{
Border = new Border(2),
BorderColor = RgbColors.Red,
Color = RgbColors.Red
};
page.Content.SetTranslate(100, minY - 100);
page.Content.AppendContentElement(textBlock, 100, 100);
// incremental save
// document.Save();
// or simple save
using (Stream outStream = new FileStream("out.pdf", FileMode.Create, FileAccess.ReadWrite))
{
document.Save(outStream);
}
}
}
}
我用itextsharp实现了我的目标 演示代码：
using System;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;
private void ButtonEditPDF_Click(object sender, EventArgs e)
{
string fileInputPath = "input.pdf";
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(40, 60);//use any image if you want
if (checkEditIsNewPage.Checked == true)
{
AddCommentsToFile_NewPage(fileInputPath , memoEdit1.Text,bitmap);//memoEdit1.Text or your string paragraph
}
else
{
AddCommentsToFile_SamePage(fileInputPath , memoEdit1.Text,bitmap);//memoEdit1.Text or your string paragraph
}
}
private static string AddCommentsToFile_NewPage(string fileName, string userComments, System.Drawing.Bitmap bitmap)
{
string outputFileName = @"Output_N.pdf";
//Step 1: Create a Docuement-Object
Document document = new Document();
try
{
//Step 2: we create a writer that listens to the document
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(outputFileName, FileMode.Create));
//Step 3: Open the document
document.Open();
PdfContentByte cb = writer.DirectContent;
//The current file path
string filename = fileName;
// we create a reader for the document
PdfReader reader = new PdfReader(filename);
PdfReader.unethicalreading = true;
for (int pageNumber = 1; pageNumber < reader.NumberOfPages + 1; pageNumber++)
{
document.SetPageSize(reader.GetPageSizeWithRotation(1));
document.NewPage();
//Insert to Destination on the first page
if (pageNumber == 1)
{
Chunk fileRef = new Chunk(" ");
fileRef.SetLocalDestination(filename);
document.Add(fileRef);
}
PdfImportedPage page = writer.GetImportedPage(reader, pageNumber);
int rotation = reader.GetPageRotation(pageNumber);
if (rotation == 90 || rotation == 270)
{
cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(pageNumber).Height);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
}
// Add a new page to the pdf file
document.NewPage();
Paragraph paragraph = new Paragraph();
iTextSharp.text.Font titleFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 15
, iTextSharp.text.Font.BOLD
, BaseColor.BLACK
);
Chunk titleChunk = new Chunk("Reamkrs", titleFont);
paragraph.Add(titleChunk);
document.Add(paragraph);
paragraph = new Paragraph();
iTextSharp.text.Font textFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 12
, iTextSharp.text.Font.NORMAL
, BaseColor.BLACK
);
Chunk textChunk = new Chunk(userComments, textFont);
paragraph.Add(textChunk);
document.Add(paragraph);
paragraph = new Paragraph();
document.Add(Chunk.NEWLINE);
Image logo = Image.GetInstance(bitmap, System.Drawing.Imaging.ImageFormat.Bmp);
Phrase signature = new Phrase(new Chunk(logo, 0, -10, true));
signature.Add(new Chunk(Environment.NewLine));
paragraph.Add(signature);
document.Add(paragraph);
}
catch (Exception e)
{
throw e;
}
finally
{
document.Close();
}
return outputFileName;
}
private void AddCommentsToFile_SamePage(string file2, string text, System.Drawing.Bitmap bitmap)
{
try
{
PdfReader reader = new PdfReader(new RandomAccessFileOrArray(file2), null);
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
TextMarginFinder finder = new TextMarginFinder();
PdfReader.unethicalreading = true;
using (PdfStamper stamper = new PdfStamper(reader, new FileStream(@"Output.pdf", FileMode.Create, FileAccess.Write)))
{
// int pageNumber = reader.NumberOfPages;
// finder = parser.ProcessContent(pageNumber, new TextMarginFinder());
PdfContentByte cb = stamper.GetOverContent(1);
Rectangle rect = new Rectangle(0, 0, 0, 0);
for (int i = 1; i <= reader.NumberOfPages; i++)
{
finder = parser.ProcessContent(i, new TextMarginFinder());
cb = stamper.GetOverContent(i);
rect = new Rectangle(
finder.GetLlx(), finder.GetLly(),
finder.GetWidth() + 90f, finder.GetHeight()
);
cb.Rectangle(rect);
}
cb.Stroke();
// rect.Height = Size.Height;
var size = reader.GetPageSize(1);
iTextSharp.text.Font titleFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 15
, iTextSharp.text.Font.BOLD
, BaseColor.BLACK
);
iTextSharp.text.Font textFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 12
, iTextSharp.text.Font.NORMAL
, BaseColor.BLACK
);
Chunk titleChunk = new Chunk("Reamkrs", titleFont);
Phrase phrase = new Phrase(text,textFont);
// Image logo = Image.GetInstance("signature.png");
// System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(40, 60);
Image logo = Image.GetInstance(bitmap,System.Drawing.Imaging.ImageFormat.Bmp);
Phrase signature = new Phrase(new Chunk(logo,0,0,true));
ColumnText ct = new ColumnText(cb);
ct.SetSimpleColumn(rect);
ct.AddElement(titleChunk);
ct.AddElement(phrase);
ct.AddElement(new Chunk(Environment.NewLine));
ct.AddElement(signature);
ct.Go();
stamper.Close();
reader.Close();
}
}
catch (Exception ex)
{
MessageBox.Show("sbtn_Click : " + ex.Message);
}
}
使用系统；
使用System.Windows.Forms；
使用DevExpress.XtraEditors；
使用System.IO；
使用iTextSharp.text；
使用iTextSharp.text.pdf；
使用iTextSharp.text.pdf.parser；
private void ButtonEditPDF\u单击（对象发送者，事件参数e）
{
字符串fileInputPath=“input.pdf”；
System.Drawing.Bitmap Bitmap=new System.Drawing.Bitmap（40,60）；//如果需要，可以使用任何图像
if（checkEditIsNewPage.Checked==true）
{
AddCommentsToFile_NewPage（fileInputPath，memoEdit1.Text，位图）；//memoEdit1.Text或字符串段落
}
其他的
{
AddCommentsToFile_SamePage（fileInputPath，memoEdit1.Text，位图）；//memoEdit1.Text或字符串段落
}
}
私有静态字符串AddCommentsToFile_NewPage（字符串文件名、字符串用户注释、System.Drawing.Bitmap位图）
{
字符串outputFileName=@“Output\u N.pdf”；
//步骤1：创建文档对象
文档=新文档（）；
尝试
{
using System;
using System.Collections.Generic;
using System.IO;
using Apitron.PDF.Kit.FixedLayout;
using Apitron.PDF.Kit.FixedLayout.Content;
using Apitron.PDF.Kit.FixedLayout.PageProperties;
using FixedLayout.Resources;
using FixedLayout.ContentElements;
using FlowLayout.Content;
public void AddParagraph()
{
using (Stream stream = new FileStream("file.pdf", FileMode.Open, FileAccess.ReadWrite))
{
using (FixedDocument document = new FixedDocument(stream))
{
Page page = document.Pages[0];
double minY = page.Boundary.MediaBox.Height;
foreach(IContentElement element in page.Elements)
{
if(element != null)
{
minY = Math.Min(element.Boundary.Bottom, minY);
}
}
TextBlock textBlock = new TextBlock("I want to show new paragraph here")
{
Border = new Border(2),
BorderColor = RgbColors.Red,
Color = RgbColors.Red
};
page.Content.SetTranslate(100, minY - 100);
page.Content.AppendContentElement(textBlock, 100, 100);
// incremental save
// document.Save();
// or simple save
using (Stream outStream = new FileStream("out.pdf", FileMode.Create, FileAccess.ReadWrite))
{
document.Save(outStream);
}
}
}
}
using System;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;
private void ButtonEditPDF_Click(object sender, EventArgs e)
{
string fileInputPath = "input.pdf";
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(40, 60);//use any image if you want
if (checkEditIsNewPage.Checked == true)
{
AddCommentsToFile_NewPage(fileInputPath , memoEdit1.Text,bitmap);//memoEdit1.Text or your string paragraph
}
else
{
AddCommentsToFile_SamePage(fileInputPath , memoEdit1.Text,bitmap);//memoEdit1.Text or your string paragraph
}
}
private static string AddCommentsToFile_NewPage(string fileName, string userComments, System.Drawing.Bitmap bitmap)
{
string outputFileName = @"Output_N.pdf";
//Step 1: Create a Docuement-Object
Document document = new Document();
try
{
//Step 2: we create a writer that listens to the document
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(outputFileName, FileMode.Create));
//Step 3: Open the document
document.Open();
PdfContentByte cb = writer.DirectContent;
//The current file path
string filename = fileName;
// we create a reader for the document
PdfReader reader = new PdfReader(filename);
PdfReader.unethicalreading = true;
for (int pageNumber = 1; pageNumber < reader.NumberOfPages + 1; pageNumber++)
{
document.SetPageSize(reader.GetPageSizeWithRotation(1));
document.NewPage();
//Insert to Destination on the first page
if (pageNumber == 1)
{
Chunk fileRef = new Chunk(" ");
fileRef.SetLocalDestination(filename);
document.Add(fileRef);
}
PdfImportedPage page = writer.GetImportedPage(reader, pageNumber);
int rotation = reader.GetPageRotation(pageNumber);
if (rotation == 90 || rotation == 270)
{
cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(pageNumber).Height);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
}
// Add a new page to the pdf file
document.NewPage();
Paragraph paragraph = new Paragraph();
iTextSharp.text.Font titleFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 15
, iTextSharp.text.Font.BOLD
, BaseColor.BLACK
);
Chunk titleChunk = new Chunk("Reamkrs", titleFont);
paragraph.Add(titleChunk);
document.Add(paragraph);
paragraph = new Paragraph();
iTextSharp.text.Font textFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 12
, iTextSharp.text.Font.NORMAL
, BaseColor.BLACK
);
Chunk textChunk = new Chunk(userComments, textFont);
paragraph.Add(textChunk);
document.Add(paragraph);
paragraph = new Paragraph();
document.Add(Chunk.NEWLINE);
Image logo = Image.GetInstance(bitmap, System.Drawing.Imaging.ImageFormat.Bmp);
Phrase signature = new Phrase(new Chunk(logo, 0, -10, true));
signature.Add(new Chunk(Environment.NewLine));
paragraph.Add(signature);
document.Add(paragraph);
}
catch (Exception e)
{
throw e;
}
finally
{
document.Close();
}
return outputFileName;
}
private void AddCommentsToFile_SamePage(string file2, string text, System.Drawing.Bitmap bitmap)
{
try
{
PdfReader reader = new PdfReader(new RandomAccessFileOrArray(file2), null);
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
TextMarginFinder finder = new TextMarginFinder();
PdfReader.unethicalreading = true;
using (PdfStamper stamper = new PdfStamper(reader, new FileStream(@"Output.pdf", FileMode.Create, FileAccess.Write)))
{
// int pageNumber = reader.NumberOfPages;
// finder = parser.ProcessContent(pageNumber, new TextMarginFinder());
PdfContentByte cb = stamper.GetOverContent(1);
Rectangle rect = new Rectangle(0, 0, 0, 0);
for (int i = 1; i <= reader.NumberOfPages; i++)
{
finder = parser.ProcessContent(i, new TextMarginFinder());
cb = stamper.GetOverContent(i);
rect = new Rectangle(
finder.GetLlx(), finder.GetLly(),
finder.GetWidth() + 90f, finder.GetHeight()
);
cb.Rectangle(rect);
}
cb.Stroke();
// rect.Height = Size.Height;
var size = reader.GetPageSize(1);
iTextSharp.text.Font titleFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 15
, iTextSharp.text.Font.BOLD
, BaseColor.BLACK
);
iTextSharp.text.Font textFont = new Font(iTextSharp.text.Font.FontFamily.HELVETICA
, 12
, iTextSharp.text.Font.NORMAL
, BaseColor.BLACK
);
Chunk titleChunk = new Chunk("Reamkrs", titleFont);
Phrase phrase = new Phrase(text,textFont);
// Image logo = Image.GetInstance("signature.png");
// System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(40, 60);
Image logo = Image.GetInstance(bitmap,System.Drawing.Imaging.ImageFormat.Bmp);
Phrase signature = new Phrase(new Chunk(logo,0,0,true));
ColumnText ct = new ColumnText(cb);
ct.SetSimpleColumn(rect);
ct.AddElement(titleChunk);
ct.AddElement(phrase);
ct.AddElement(new Chunk(Environment.NewLine));
ct.AddElement(signature);
ct.Go();
stamper.Close();
reader.Close();
}
}
catch (Exception ex)
{
MessageBox.Show("sbtn_Click : " + ex.Message);
}
}