概述

本篇文章将介绍C# 在PPT幻灯片中操作形状（shape）的方法。这里主要涉及常规形状，如箭头、矩形、圆形、三角形、多边形、不规则形状等。下面的示例中，可以通过绘制形状，并设置相应格式等。示例包含以下要点：

绘制形状

用图片填充形状

在形状中添加文字

设置形状单色、渐变色填充

设置形状阴影效果

组合多个形状为一个

设置形状光边效果

将形状保存为图片

工具

下载安装后，注意在程序中添加引用Spire.Presentation.dll到程序，dll文件可在安装路径下的Bin文件夹中获取。

示例代码（供参考）

【示例1】绘制形状

步骤1：新建一个幻灯片

//新建一个幻灯片文档，并指定幻灯片大小Presentation ppt = new Presentation();ppt.SlideSize.Type = SlideSizeType.Screen16x9;

步骤2：获取第一张幻灯片

ISlide slide = ppt.Slides[0];

步骤3：添加一个云朵形状，并填充渐变色，绘入文字

//添加一个云朵形状，并填充渐变颜色IAutoShape shape1 = slide.Shapes.AppendShape(ShapeType.CalloutCloud, new RectangleF(160, 50, 200, 80));shape1.Fill.FillType = FillFormatType.Gradient;shape1.Fill.Gradient.GradientStops.Append(0, Color.Blue);shape1.Fill.Gradient.GradientStops.Append(1, Color.Azure);shape1.Line.FillType = FillFormatType.None;//在形状中绘制文本，并设置字体、字号、字体颜色等shape1.AppendTextFrame("HOW??");TextRange textRange = (shape1 as IAutoShape).TextFrame.TextRange;textRange.FontHeight = 13;textRange.LatinFont = new TextFont("Arial");textRange.Fill.FillType = FillFormatType.Solid;textRange.Fill.SolidColor.Color = Color.White;

步骤4：添加椭圆形状，并加载图片填充

IAutoShape shape2 = slide.Shapes.AppendShape(ShapeType.Ellipse, new RectangleF(50, 130, 150, 250));string picPath = "sk.png"; shape2.Fill.FillType = FillFormatType.Picture;shape2.Fill.PictureFill.Picture.Url = picPath;shape2.Fill.PictureFill.FillType = PictureFillType.Stretch;shape2.Line.FillType = FillFormatType.None;

步骤5：添加三角形，并设置边框效果，阴影效果

//添加一个三角形,填充颜色并设置边框样式IAutoShape shape3 = slide.Shapes.AppendShape(ShapeType.Triangle, new RectangleF(480, 180, 100, 130));shape3.Fill.FillType = FillFormatType.Solid;shape3.Fill.SolidColor.Color = Color.Wheat;shape3.Line.Width = 3;shape3.Line.DashStyle = LineDashStyleType.Dash;shape3.ShapeStyle.LineColor.Color = Color.Red;//设置形状阴影效果PresetShadow presetShadow = new PresetShadow();presetShadow.Preset = PresetShadowValue.BackRightPerspective;presetShadow.ColorFormat.Color = Color.LightGray;shape3.EffectDag.PresetShadowEffect = presetShadow;

步骤6：添加一个带箭头的直线

IAutoShape shape4 = slide.Shapes.AppendShape(ShapeType.Line, new RectangleF(660, 200, 100, 100));shape4.ShapeStyle.LineColor.Color = Color.Red;shape4.Line.LineEndType = LineEndType.StealthArrow;shape4.Rotation = -90;//设置形状旋转角度

步骤7：绘制一个圆形、五角星，并设置光边效果，将拉个形状组合

//添加一个圆形IAutoShape shape5 = slide.Shapes.AppendShape(ShapeType.Ellipse, new RectangleF(289, 166, 120, 120));shape5.Fill.FillType = FillFormatType.Solid;shape5.Fill.SolidColor.Color = Color.White;shape5.Line.FillType = FillFormatType.Solid;shape5.Line.SolidFillColor.Color = Color.Red;//添加一个五角星形状IAutoShape shape6 = slide.Shapes.AppendShape(ShapeType.FivePointedStar, new RectangleF(300, 170, 100, 100));shape6.Fill.FillType = FillFormatType.Solid;shape6.Fill.SolidColor.Color = Color.Orange;shape6.Line.FillType = FillFormatType.None;//设置五角星形状的光边效果GlowEffect glow = new GlowEffect();glow.ColorFormat.Color = Color.Yellow;glow.Radius = 7.0;shape6.EffectDag.GlowEffect = glow;//将shape5和shape6两个形状组合ArrayList list = new ArrayList();list.Add(shape5);list.Add(shape6);ppt.Slides[0].GroupShapes(list);

步骤8：保存文档

ppt.SaveToFile("result.pptx", FileFormat.Pptx2010);

完成代码后，调试运行程序，生成文档，如下图

全部代码：

using Spire.Presentation;using Spire.Presentation.Drawing;using System.Collections;using System.Drawing;namespace DrawShape_PPT{    class Program    {        static void Main(string[] args)        {            //新建一个幻灯片文档，并指定幻灯片大小            Presentation ppt = new Presentation();            ppt.SlideSize.Type = SlideSizeType.Screen16x9;            //获取第一张幻灯片            ISlide slide = ppt.Slides[0];            //添加一个云朵形状，并填充渐变颜色            IAutoShape shape1 = slide.Shapes.AppendShape(ShapeType.CalloutCloud, new RectangleF(160, 50, 200, 80));            shape1.Fill.FillType = FillFormatType.Gradient;            shape1.Fill.Gradient.GradientStops.Append(0, Color.Blue);            shape1.Fill.Gradient.GradientStops.Append(1, Color.Azure);            shape1.Line.FillType = FillFormatType.None;            //在形状中绘制文本，并设置字体、字号、字体颜色等            shape1.AppendTextFrame("HOW??");            TextRange textRange = (shape1 as IAutoShape).TextFrame.TextRange;            textRange.FontHeight = 13;            textRange.LatinFont = new TextFont("Arial");            textRange.Fill.FillType = FillFormatType.Solid;            textRange.Fill.SolidColor.Color = Color.White;            //添加一个椭圆，并用图片填充形状            IAutoShape shape2 = slide.Shapes.AppendShape(ShapeType.Ellipse, new RectangleF(50, 130, 150, 250));            string picPath = "sk.png";             shape2.Fill.FillType = FillFormatType.Picture;            shape2.Fill.PictureFill.Picture.Url = picPath;            shape2.Fill.PictureFill.FillType = PictureFillType.Stretch;            shape2.Line.FillType = FillFormatType.None;            //添加一个三角形,填充颜色并设置形状边框样式            IAutoShape shape3 = slide.Shapes.AppendShape(ShapeType.Triangle, new RectangleF(480, 180, 100, 130));            shape3.Fill.FillType = FillFormatType.Solid;            shape3.Fill.SolidColor.Color = Color.Wheat;            shape3.Line.Width = 3;            shape3.Line.DashStyle = LineDashStyleType.Dash;            shape3.ShapeStyle.LineColor.Color = Color.Red;            //设置形状阴影效果            PresetShadow presetShadow = new PresetShadow();            presetShadow.Preset = PresetShadowValue.BackRightPerspective;            presetShadow.ColorFormat.Color = Color.LightGray;            shape3.EffectDag.PresetShadowEffect = presetShadow;                     //添加一个带箭头的直线            IAutoShape shape4 = slide.Shapes.AppendShape(ShapeType.Line, new RectangleF(660, 200, 100, 100));            shape4.ShapeStyle.LineColor.Color = Color.Red;            shape4.Line.LineEndType = LineEndType.StealthArrow;            shape4.Rotation = -90;//设置形状旋转角度            //添加一个圆形            IAutoShape shape5 = slide.Shapes.AppendShape(ShapeType.Ellipse, new RectangleF(289, 166, 120, 120));            shape5.Fill.FillType = FillFormatType.Solid;            shape5.Fill.SolidColor.Color = Color.White;            shape5.Line.FillType = FillFormatType.Solid;            shape5.Line.SolidFillColor.Color = Color.Red;            //添加一个五角星形状            IAutoShape shape6 = slide.Shapes.AppendShape(ShapeType.FivePointedStar, new RectangleF(300, 170, 100, 100));            shape6.Fill.FillType = FillFormatType.Solid;            shape6.Fill.SolidColor.Color = Color.Orange;            shape6.Line.FillType = FillFormatType.None;            //设置五角星形状的光边效果            GlowEffect glow = new GlowEffect();            glow.ColorFormat.Color = Color.Yellow;            glow.Radius = 7.0;            shape6.EffectDag.GlowEffect = glow;                        //将shape5和shape6两个形状组合            ArrayList list = new ArrayList();            list.Add(shape5);            list.Add(shape6);            ppt.Slides[0].GroupShapes(list);            //保存文档            ppt.SaveToFile("result.pptx", FileFormat.Pptx2010);            System.Diagnostics.Process.Start("result.pptx");        }    }}

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【示例2】将形状保存为图片

步骤1：加载测试文档

Presentation ppt = new Presentation();ppt.LoadFromFile("test.pptx");

步骤2：将形状保存为图片

//遍历第一张幻灯片中的所有图形 for (int i = 0; i < ppt.Slides[0].Shapes.Count; i++) {     //获取幻灯片中的图形，并保存为.png格式的图片     Image image = ppt.Slides[0].Shapes.SaveAsImage(i);     image.Save(String.Format("Picture-{0}.png", i), System.Drawing.Imaging.ImageFormat.Png); }

全部代码：

using Spire.Presentation;using System;using System.Drawing;namespace SaveShapesAsImgs_PPT{    class Program    {        static void Main(string[] args)        {            //实例化Presentation类的对象，并加载测试文档            Presentation ppt = new Presentation();            ppt.LoadFromFile("test.pptx");            //遍历第一张幻灯片中的所有图形            for (int i = 0; i < ppt.Slides[0].Shapes.Count; i++)            {                //获取幻灯片中的图形，并保存为.png格式的图片                Image image = ppt.Slides[0].Shapes.SaveAsImage(i);                image.Save(String.Format("Picture-{0}.png", i), System.Drawing.Imaging.ImageFormat.Png);            }        }    }}

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（本文完）

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