本次内容介绍在C#程序中给PPT幻灯片添加Latex数学公式,添加公式前,首先需要在幻灯片中插入一个Shape形状,在形状的段落中通过方法Paragraphs.AddParagraphFromLatexMathCode( string latexMathCode)写入公式,最后保存。
【dll引用】
本次使用PPT库Spire.Presentation for .NET Version 6.9.2,在VS程序中添加引用Spire.Presentation.dll。2种引用方法:
1.下载包到本地,解压,将Bin文件夹下的dll引用至VS
2. NuGet搜索下载安装到VS程序
【代码示例】
C#
using Spire.Presentation; using Spire.Presentation.Drawing; using System.Drawing; namespace AddFormular { class Program { static void Main(string[] args) { //新建一个PPT幻灯片文档,并获取第一张幻灯片(新建的幻灯片已默认包含一张幻灯片) Presentation ppt = new Presentation(); ISlide slide = ppt.Slides[0]; //添加形状到幻灯片 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}} $"; shape.TextFrame.Paragraphs.AddParagraphFromLatexMathCode(latexMathCode); //保存 ppt.SaveToFile("AddLatexMathCode.pptx", FileFormat.Pptx2013); System.Diagnostics.Process.Start("AddLatexMathCode.pptx"); } } }
VB.NET
Imports Spire.Presentation Imports Spire.Presentation.Drawing Imports System.Drawing Namespace AddFormular Class Program Private Shared Sub Main(args As String()) '新建一个PPT幻灯片文档,并获取第一张幻灯片(新建的幻灯片已默认包含一张幻灯片) Dim ppt As New Presentation() Dim slide As ISlide = ppt.Slides(0) '添加形状到幻灯片 Dim shape As IAutoShape = slide.Shapes.AppendShape(ShapeType.Rectangle, New RectangleF(30, 100, 400, 30)) shape.Fill.FillType = FillFormatType.None shape.ShapeStyle.LineColor.Color = Color.White shape.TextFrame.Paragraphs.Clear() '添加公式 Dim latexMathCode As String = "$ 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
公式添加效果如图:
【API】
代码中涉及到的类(如Presentation)、接口(如ISlide、IAutoShape)等相关解释和使用方法可在Spire.Presentation Namespace中查看。
—End—