C# 在PDF文檔中應用多種不同字型

在PDF文檔中，可繪制不同字型樣式、不同語言的文字，可通過使用Standard字型、TrueType字型、CJK字型或者自定義（私有）等字型類型。下面通過C#程式代碼來展示如何實作使用以上類型的字型來繪制文本。

引入dll

 本次程式中引入的是Spire.Pdf.dll，引入方法如下：

【方法1】通過NuGet安裝。

1. 可以在Visual Studio中打開“解決方案資料總管”，滑鼠右鍵點選“引用”，“管理NuGet包”，然後搜尋“Free Spire.PDF”，點選“安裝”。
2. 也可以将以下内容複制到PM控制台安裝：

             Install-Package FreeSpire.PDF -Version 7.8.9

【方法2】手動安裝。

可通過手動下載下傳Free Spire.PDF for .NET包，然後解壓，找到BIN檔案夾下的Spire.Pdf.dll。在Visual Studio中打開“解決方案資料總管”，滑鼠右鍵點選“引用”，“添加引用”，将本地路徑BIN檔案夾下的dll檔案添加引用至程式。

應用字型

C#

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

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

            //添加一頁
            PdfPageBase page = pdf.Pages.Add();

            //初始化y坐标
            float y = 30;

            //使用standard字型繪制文字
            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字型繪制文字           
            PdfTrueTypeFont trueTypeFont = new PdfTrueTypeFont(new Font("Arial", 12f), true);
            page.Canvas.DrawString("TrueType Font - Arial", trueTypeFont, PdfBrushes.Blue, 0, (y = y + 30f));

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

            //使用cjk字型繪制文字
            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));

            //儲存文檔
            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())
            '建立PdfDocument對象
            Dim pdf As New PdfDocument()

            '添加一頁
            Dim page As PdfPageBase = pdf.Pages.Add()

            '初始化y坐标
            Dim y As Single = 30

            '使用standard字型繪制文字
            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字型繪制文字           
            Dim trueTypeFont As New PdfTrueTypeFont(New Font("Arial", 12F), True)
            page.Canvas.DrawString("TrueType Font - Arial", trueTypeFont, PdfBrushes.Blue, 0, (InlineAssignHelper(y, y + 30F)))

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


            '使用cjk字型繪制文字
            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)))

            '儲存文檔
            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      

字型繪制效果：

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