itextsharp 可以显示pdf文件吗

发布网友发布时间：2022-12-21 22:03

共1个回答

热心网友时间：2024-11-30 18:59

using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;

namespace DotNet.Utilities
{
/// <summary>
/// PDF文档操作类
/// </summary>
//------------------------------------调用--------------------------------------------
//PDFOperation pdf = new PDFOperation();
//pdf.Open(new FileStream(path, FileMode.Create));
//pdf.SetBaseFont(@"C:\Windows\Fonts\SIMHEI.TTF");
//pdf.AddParagraph("测试文档（生成时间：" + DateTime.Now + "）", 15, 1, 20, 0, 0);
//pdf.Close();
//-------------------------------------------------------------------------------------
public class PDFOperation
{
#region 构造函数
/// <summary>
/// 构造函数
/// </summary>
public PDFOperation()
{
rect = PageSize.A4;
document = new Document(rect);
}

/// <summary>
/// 构造函数
/// </summary>
/// <param name="type">页面大小(如"A4")</param>
public PDFOperation(string type)
{
SetPageSize(type);
document = new Document(rect);
}

/// <summary>
/// 构造函数
/// </summary>
/// <param name="type">页面大小(如"A4")</param>
/// <param name="marginLeft">内容距左边框距离</param>
/// <param name="marginRight">内容距右边框距离</param>
/// <param name="marginTop">内容距上边框距离</param>
/// <param name="marginBottom">内容距下边框距离</param>
public PDFOperation(string type, float marginLeft, float marginRight, float marginTop, float marginBottom)
{
SetPageSize(type);
document = new Document(rect, marginLeft, marginRight, marginTop, marginBottom);
}
#endregion

#region 私有字段
private Font font;
private Rectangle rect; //文档大小
private Document document;//文档对象
private BaseFont basefont;//字体
#endregion

#region 设置字体
/// <summary>
/// 设置字体
/// </summary>
public void SetBaseFont(string path)
{
basefont = BaseFont.CreateFont(path, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
}

/// <summary>
/// 设置字体
/// </summary>
/// <param name="size">字体大小</param>
public void SetFont(float size)
{
font = new Font(basefont, size);
}
#endregion

#region 设置页面大小
/// <summary>
/// 设置页面大小
/// </summary>
/// <param name="type">页面大小(如"A4")</param>
public void SetPageSize(string type)
{
switch (type.Trim())
{
case "A4":
rect = PageSize.A4;
break;
case "A8":
rect = PageSize.A8;
break;
}
}
#endregion

#region 实例化文档
/// <summary>
/// 实例化文档
/// </summary>
/// <param name="os">文档相关信息（如路径，打开方式等）</param>
public void GetInstance(Stream os)
{
PdfWriter.GetInstance(document, os);
}
#endregion

#region 打开文档对象
/// <summary>
/// 打开文档对象
/// </summary>
/// <param name="os">文档相关信息（如路径，打开方式等）</param>
public void Open(Stream os)
{
GetInstance(os);
document.Open();
}
#endregion

#region 关闭打开的文档
/// <summary>
/// 关闭打开的文档
/// </summary>
public void Close()
{
document.Close();
}
#endregion

#region 添加段落
/// <summary>
/// 添加段落
/// </summary>
/// <param name="content">内容</param>
/// <param name="fontsize">字体大小</param>
public void AddParagraph(string content, float fontsize)
{
SetFont(fontsize);
Paragraph pra = new Paragraph(content, font);
document.Add(pra);
}

/// <summary>
/// 添加段落
/// </summary>
/// <param name="content">内容</param>
/// <param name="fontsize">字体大小</param>
/// <param name="Alignment">对齐方式（1为居中，0为居左，2为居右）</param>
/// <param name="SpacingAfter">段后空行数（0为默认值）</param>
/// <param name="SpacingBefore">段前空行数（0为默认值）</param>
/// <param name="MultipliedLeading">行间距（0为默认值）</param>
public void AddParagraph(string content, float fontsize, int Alignment, float SpacingAfter, float SpacingBefore, float MultipliedLeading)
{
SetFont(fontsize);
Paragraph pra = new Paragraph(content, font);
pra.Alignment = Alignment;
if (SpacingAfter != 0)
{
pra.SpacingAfter = SpacingAfter;
}
if (SpacingBefore != 0)
{
pra.SpacingBefore = SpacingBefore;
}
if (MultipliedLeading != 0)
{
pra.MultipliedLeading = MultipliedLeading;
}
document.Add(pra);
}
#endregion

#region 添加图片
/// <summary>
/// 添加图片
/// </summary>
/// <param name="path">图片路径</param>
/// <param name="Alignment">对齐方式（1为居中，0为居左，2为居右）</param>
/// <param name="newWidth">图片宽（0为默认值，如果宽度大于页宽将按比率缩放）</param>
/// <param name="newHeight">图片高</param>
public void AddImage(string path, int Alignment, float newWidth, float newHeight)
{
Image img = Image.GetInstance(path);
img.Alignment = Alignment;
if (newWidth != 0)
{
img.ScaleAbsolute(newWidth, newHeight);
}
else
{
if (img.Width > PageSize.A4.Width)
{
img.ScaleAbsolute(rect.Width, img.Width * img.Height / rect.Height);
}
}
document.Add(img);
}
#endregion

#region 添加链接、点
/// <summary>
/// 添加链接
/// </summary>
/// <param name="Content">链接文字</param>
/// <param name="FontSize">字体大小</param>
/// <param name="Reference">链接地址</param>
public void AddAnchorReference(string Content, float FontSize, string Reference)
{
SetFont(FontSize);
Anchor auc = new Anchor(Content, font);
auc.Reference = Reference;
document.Add(auc);
}

/// <summary>
/// 添加链接点
/// </summary>
/// <param name="Content">链接文字</param>
/// <param name="FontSize">字体大小</param>
/// <param name="Name">链接点名</param>
public void AddAnchorName(string Content, float FontSize, string Name)
{
SetFont(FontSize);
Anchor auc = new Anchor(Content, font);
auc.Name = Name;
document.Add(auc);
}
#endregion
}
}