C＃ 在PDF文档中应用多种不同字体

在PDF文档中，可绘制不同字体样式、不同语言的文字，可通过使用Standard字体、TrueType字体、CJK字体或者自定义（私有）等字体类型。下面通过C#程序代码来展示如何实现使用以上类型的字体来绘制文本。

引入dll

本次程序中引入的是Spire.Pdf.dll，引入方法如下：

【方法1】通过NuGet安装。

1. 可以在Visual Studio中打开“解决方案资源管理器”，鼠标右键点击“引用”，“管理NuGet包”，然后搜索“Free Spire.PDF”，点击“安装”。
2. 也可以将以下内容复制到PM控制台安装：

          Install-Package FreeSpire.PDF -Version 7.8.9

【方法2】手动安装。

可通过手动下载Free Spire.PDF for .NET包，然后解压，找到BIN文件夹下的Spire.Pdf.dll。在Visual Studio中打开“解决方案资源管理器”，鼠标右键点击“引用”，“添加引用”，将本地路径BIN文件夹下的dll文件添加引用至程序。

应用字体

C#

using Spire.Pdf;
using Spire.Pdf.Graphics;
using System.Drawing;

namespace ApplyFonts
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建PdfDocument对象
            PdfDocument pdf = new PdfDocument();

            //添加一页
            PdfPageBase page = pdf.Pages.Add();

            //初始化y坐标
            float y = 30;

            //使用standard字体绘制文字
            PdfFont standardFont = new PdfFont(PdfFontFamily.Helvetica, 14f);
            page.Canvas.DrawString("Standard Font - Helvetica", standardFont, PdfBrushes.Black, 0, y);
            standardFont = new PdfFont(PdfFontFamily.TimesRoman, 14f);
            page.Canvas.DrawString("Standard Font - Times_Roman", standardFont, PdfBrushes.Black, 0, (y = y + 16));
            standardFont = new PdfFont(PdfFontFamily.Courier, 14f);
            page.Canvas.DrawString("Standard Font - Courier", standardFont, PdfBrushes.Black, 0, (y = y + 16));

            //使用true type字体绘制文字           
            PdfTrueTypeFont trueTypeFont = new PdfTrueTypeFont(new Font("Arial", 12f), true);
            page.Canvas.DrawString("TrueType Font - Arial", trueTypeFont, PdfBrushes.Blue, 0, (y = y + 30f));

            /*//使用私有字体绘制文字
            string fontFileName = "C:\\Users\\Administrator\\Desktop\\fontfile.ttf";
            trueTypeFont = new PdfTrueTypeFont(fontFileName, 14f);
            page.Canvas.DrawString("Private Font: 私有字体", trueTypeFont, PdfBrushes.DarkGreen, 0, (y = y + 30f));
            */

            //使用cjk字体绘制文字
            PdfCjkStandardFont cjkFont = new PdfCjkStandardFont(PdfCjkFontFamily.MonotypeHeiMedium, 14f);
            page.Canvas.DrawString("你 好", cjkFont, PdfBrushes.DeepPink, 0, (y = y + 30f));
            cjkFont = new PdfCjkStandardFont(PdfCjkFontFamily.HanyangSystemsGothicMedium, 14f);
            page.Canvas.DrawString("こんにちは", cjkFont, PdfBrushes.OrangeRed, 0, (y = y + 16f));
            cjkFont = new PdfCjkStandardFont(PdfCjkFontFamily.HanyangSystemsShinMyeongJoMedium, 14f);
            page.Canvas.DrawString("안녕하세요", cjkFont, PdfBrushes.Purple, 0, (y = y + 16f));

            //保存文档
            pdf.SaveToFile("ApplyFonts.pdf",FileFormat.PDF);
            System.Diagnostics.Process.Start("ApplyFonts.pdf");
        }
    }
}

VB.NET

Imports Spire.Pdf
Imports Spire.Pdf.Graphics
Imports System.Drawing

Namespace ApplyFonts
	Class Program
		Private Shared Sub Main(args As String())
			'创建PdfDocument对象
			Dim pdf As New PdfDocument()

			'添加一页
			Dim page As PdfPageBase = pdf.Pages.Add()

			'初始化y坐标
			Dim y As Single = 30

			'使用standard字体绘制文字
			Dim standardFont As New PdfFont(PdfFontFamily.Helvetica, 14F)
			page.Canvas.DrawString("Standard Font - Helvetica", standardFont, PdfBrushes.Black, 0, y)
			standardFont = New PdfFont(PdfFontFamily.TimesRoman, 14F)
			page.Canvas.DrawString("Standard Font - Times_Roman", standardFont, PdfBrushes.Black, 0, (InlineAssignHelper(y, y + 16)))
			standardFont = New PdfFont(PdfFontFamily.Courier, 14F)
			page.Canvas.DrawString("Standard Font - Courier", standardFont, PdfBrushes.Black, 0, (InlineAssignHelper(y, y + 16)))

			'使用true type字体绘制文字           
			Dim trueTypeFont As New PdfTrueTypeFont(New Font("Arial", 12F), True)
			page.Canvas.DrawString("TrueType Font - Arial", trueTypeFont, PdfBrushes.Blue, 0, (InlineAssignHelper(y, y + 30F)))

			'//使用私有字体绘制文字
'            string fontFileName = "C:\\Users\\Administrator\\Desktop\\fontfile.ttf";
'            trueTypeFont = new PdfTrueTypeFont(fontFileName, 14f);
'            page.Canvas.DrawString("Private Font: 私有字体", trueTypeFont, PdfBrushes.DarkGreen, 0, (y = y + 30f));
'            


			'使用cjk字体绘制文字
			Dim cjkFont As New PdfCjkStandardFont(PdfCjkFontFamily.MonotypeHeiMedium, 14F)
			page.Canvas.DrawString("你 好", cjkFont, PdfBrushes.DeepPink, 0, (InlineAssignHelper(y, y + 30F)))
			cjkFont = New PdfCjkStandardFont(PdfCjkFontFamily.HanyangSystemsGothicMedium, 14F)
			page.Canvas.DrawString("こんにちは", cjkFont, PdfBrushes.OrangeRed, 0, (InlineAssignHelper(y, y + 16F)))
			cjkFont = New PdfCjkStandardFont(PdfCjkFontFamily.HanyangSystemsShinMyeongJoMedium, 14F)
			page.Canvas.DrawString("안녕하세요", cjkFont, PdfBrushes.Purple, 0, (InlineAssignHelper(y, y + 16F)))

			'保存文档
			pdf.SaveToFile("ApplyFonts.pdf", FileFormat.PDF)
			System.Diagnostics.Process.Start("ApplyFonts.pdf")
		End Sub
		Private Shared Function InlineAssignHelper(Of T)(ByRef target As T, value As T) As T
			target = value
			Return value
		End Function
	End Class
End Namespace

字体绘制效果：

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