C# 在PDF文档中应用多种不同字体

忘是亡心i 2023-10-11 17:01 19阅读 0赞

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：

![watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBARWljZWJsdWU_size_20_color_FFFFFF_t_70_g_se_x_16][]

**—End—**

[NuGet]: https://www.nuget.org/packages/FreeSpire.PDF/
[Free Spire.PDF for .NET]: https://www.e-iceblue.cn/Downloads/Free-Spire-PDF-NET.html
[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBARWljZWJsdWU_size_20_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/7d2be25430544fb184f14d335653e047.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBARWljZWJsdWU=,size_20,color_FFFFFF,t_70,g_se,x_16