本次內容介紹在C#程序中給PPT幻燈片添加Latex數學公式,添加公式前,首先需要在幻燈片中插入一個Shape形狀,在形狀的段落中通過方法Paragraphs.AddParagraphFromLatexMathCode( string latexMathCode)寫入公式,最后保存。
【dll引用】
本次使用PPT庫Spire.Presentation for .NET Version 6.9.2,在VS程序中添加引用Spire.Presentation.dll。2種引用方法:
1.下載包到本地,解壓,將Bin文件夾下的dll引用至VS
2. NuGet搜索下載安裝到VS程序
【代碼示例】
C#
using Spire.Presentation; using Spire.Presentation.Drawing; using System.Drawing; namespace AddFormular { class Program { static void Main(string[] args) { //新建一個PPT幻燈片文檔,並獲取第一張幻燈片(新建的幻燈片已默認包含一張幻燈片) Presentation ppt = new Presentation(); ISlide slide = ppt.Slides[0]; //添加形狀到幻燈片 IAutoShape shape = slide.Shapes.AppendShape(ShapeType.Rectangle, new RectangleF(30, 100, 400, 30)); shape.Fill.FillType = FillFormatType.None; shape.ShapeStyle.LineColor.Color = Color.White; shape.TextFrame.Paragraphs.Clear(); //添加公式 string latexMathCode = @"$ f(x,y) = \sqrt[n]{{x^2}{y^3}} $"; shape.TextFrame.Paragraphs.AddParagraphFromLatexMathCode(latexMathCode); //保存 ppt.SaveToFile("AddLatexMathCode.pptx", FileFormat.Pptx2013); System.Diagnostics.Process.Start("AddLatexMathCode.pptx"); } } }
VB.NET
Imports Spire.Presentation Imports Spire.Presentation.Drawing Imports System.Drawing Namespace AddFormular Class Program Private Shared Sub Main(args As String()) '新建一個PPT幻燈片文檔,並獲取第一張幻燈片(新建的幻燈片已默認包含一張幻燈片) Dim ppt As New Presentation() Dim slide As ISlide = ppt.Slides(0) '添加形狀到幻燈片 Dim shape As IAutoShape = slide.Shapes.AppendShape(ShapeType.Rectangle, New RectangleF(30, 100, 400, 30)) shape.Fill.FillType = FillFormatType.None shape.ShapeStyle.LineColor.Color = Color.White shape.TextFrame.Paragraphs.Clear() '添加公式 Dim latexMathCode As String = "$ f(x,y) = \sqrt[n]{{x^2}{y^3}} $" shape.TextFrame.Paragraphs.AddParagraphFromLatexMathCode(latexMathCode) '保存 ppt.SaveToFile("AddLatexMathCode.pptx", FileFormat.Pptx2013) System.Diagnostics.Process.Start("AddLatexMathCode.pptx") End Sub End Class End Namespace
公式添加效果如圖:
【API】
代碼中涉及到的類(如Presentation)、接口(如ISlide、IAutoShape)等相關解釋和使用方法可在Spire.Presentation Namespace中查看。
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