以上的类中，我们可以看到我们可以设置需要打印的纸张类型，根据实际情况可以选择。在最下面我们看到了两种方法，一个是PageSize()设置纸张大小，一个是GetRectangle()绘制矩形。
以上是对itextSharp组件的一些类和方法的简单介绍，对于表格，单元格等等类的介绍就不再继续，有兴趣的可以自己查看源代码信息。
三.itextSharp组件实例：
上面介绍了itextSharp组件的背景、特性，以及组件的核心类和方法，在这里给出一个简单的itextSharp组件操作的实例，这个实例只是一个简单的介绍。
/// <summary>
/// 字体
/// </summary>
private Font _font;
/// <summary>
/// 文档大小
/// </summary>
private Rectangle _rect;
/// <summary>
/// 文档对象
/// </summary>
private readonly Document _document;
/// <summary>
/// 基础字体
/// </summary>
private BaseFont _basefont;
/// <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)
{
if (string.IsNullOrEmpty(type))
{
throw new ArgumentNullException(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)
{
if (string.IsNullOrEmpty(type))
{
throw new ArgumentNullException(type);
}
SetPageSize(type);
_document = new Document(_rect, marginLeft, marginRight, marginTop, marginBottom);
}
/// <summary>
/// 设置字体
/// </summary>
public void SetBaseFont(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(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);
}
/// <summary>
/// 设置页面大小
/// </summary>
/// <param name="type">页面大小(如"A4")</param>
public void SetPageSize(string type)
{
if (string.IsNullOrEmpty(type))
{
throw new ArgumentNullException(type);
}
switch (type.Trim())
{
//枚举需要的文档纸张大小
case "A3":
_rect = PageSize.A3;
break;
case "A4":
_rect = PageSize.A4;
break;
case "A8":
_rect = PageSize.A8;
break;
}
}
/// <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)
{
if (os == null)
{
throw new ArgumentNullException("os");
}
PdfWriter.GetInstance(_document, os);
}
/// <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)
{
if (os == null)
{
throw new ArgumentNullException("os");
}
GetInstance(os);
_document.Open();
}
/// <summary>
/// 关闭打开的文档
/// </summary>
public void Close()
{
_document.Close();
}
/// <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);
var 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);
var pra = new Paragraph(content, _font)
{
Alignment = alignment
};
if (spacingAfter != 0)
{
pra.SpacingAfter = spacingAfter;
}
if (spacingBefore != 0)
{
pra.SpacingBefore = spacingBefore;
}
if (multipliedLeading != 0)
{
pra.MultipliedLeading = multipliedLeading;
}
_document.Add(pra);
}
/// <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)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(path);
}
var img = Image.GetInstance(path);
img.Alignment = alignment;
// ReSharper disable once CompareOfFloatsByEqualityOperator
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);
}
/// <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)
{
if (string.IsNullOrEmpty(content))
{
throw new ArgumentNullException(content);
}
SetFont(fontSize);
var auc = new Anchor(content, _font)
{
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)
{
if (string.IsNullOrEmpty(content))
{
throw new ArgumentNullException(content);
}
SetFont(fontSize);
var auc = new Anchor(content, _font)
{
Name = name
};
_document.Add(auc);
}
