概述
本篇文章將介紹C# 在PPT幻燈片中操作形狀（shape）的方法。這里主要涉及常規形狀，如箭頭、矩形、圓形、三角形、多邊形、不規則形狀等。下面的示例中，可以通過繪制形狀，並設置相應格式等。示例包含以下要點：
- 繪制形狀
- 用圖片填充形狀
- 在形狀中添加文字
- 設置形狀單色、漸變色填充
- 設置形狀陰影效果
- 組合多個形狀為一個
- 設置形狀光邊效果
- 將形狀保存為圖片
工具
下載安裝后，注意在程序中添加引用Spire.Presentation.dll到程序，dll文件可在安裝路徑下的Bin文件夾中獲取。
示例代碼（供參考）
【示例1】繪制形狀
步驟1：新建一個幻燈片
//新建一個幻燈片文檔，並指定幻燈片大小 Presentation ppt = new Presentation(); ppt.SlideSize.Type = SlideSizeType.Screen16x9;
步驟2：獲取第一張幻燈片
ISlide slide = ppt.Slides[0];
步驟3：添加一個雲朵形狀，並填充漸變色，繪入文字
//添加一個雲朵形狀，並填充漸變顏色 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; //在形狀中繪制文本，並設置字體、字號、字體顏色等 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;
步驟4：添加橢圓形狀，並加載圖片填充
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;
步驟5：添加三角形，並設置邊框效果，陰影效果
//添加一個三角形,填充顏色並設置邊框樣式 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; //設置形狀陰影效果 PresetShadow presetShadow = new PresetShadow(); presetShadow.Preset = PresetShadowValue.BackRightPerspective; presetShadow.ColorFormat.Color = Color.LightGray; shape3.EffectDag.PresetShadowEffect = presetShadow;
步驟6：添加一個帶箭頭的直線
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;//設置形狀旋轉角度
步驟7：繪制一個圓形、五角星，並設置光邊效果，將拉個形狀組合
//添加一個圓形 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; //添加一個五角星形狀 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; //設置五角星形狀的光邊效果 GlowEffect glow = new GlowEffect(); glow.ColorFormat.Color = Color.Yellow; glow.Radius = 7.0; shape6.EffectDag.GlowEffect = glow; //將shape5和shape6兩個形狀組合 ArrayList list = new ArrayList(); list.Add(shape5); list.Add(shape6); ppt.Slides[0].GroupShapes(list);
步驟8：保存文檔
ppt.SaveToFile("result.pptx", FileFormat.Pptx2010);
完成代碼后，調試運行程序，生成文檔，如下圖
全部代碼：
using Spire.Presentation; using Spire.Presentation.Drawing; using System.Collections; using System.Drawing; namespace DrawShape_PPT { class Program { static void Main(string[] args) { //新建一個幻燈片文檔，並指定幻燈片大小 Presentation ppt = new Presentation(); ppt.SlideSize.Type = SlideSizeType.Screen16x9; //獲取第一張幻燈片 ISlide slide = ppt.Slides[0]; //添加一個雲朵形狀，並填充漸變顏色 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; //在形狀中繪制文本，並設置字體、字號、字體顏色等 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; //添加一個橢圓，並用圖片填充形狀 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; //添加一個三角形,填充顏色並設置形狀邊框樣式 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; //設置形狀陰影效果 PresetShadow presetShadow = new PresetShadow(); presetShadow.Preset = PresetShadowValue.BackRightPerspective; presetShadow.ColorFormat.Color = Color.LightGray; shape3.EffectDag.PresetShadowEffect = presetShadow; //添加一個帶箭頭的直線 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;//設置形狀旋轉角度 //添加一個圓形 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; //添加一個五角星形狀 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; //設置五角星形狀的光邊效果 GlowEffect glow = new GlowEffect(); glow.ColorFormat.Color = Color.Yellow; glow.Radius = 7.0; shape6.EffectDag.GlowEffect = glow; //將shape5和shape6兩個形狀組合 ArrayList list = new ArrayList(); list.Add(shape5); list.Add(shape6); ppt.Slides[0].GroupShapes(list); //保存文檔 ppt.SaveToFile("result.pptx", FileFormat.Pptx2010); System.Diagnostics.Process.Start("result.pptx"); } } }
【示例2】將形狀保存為圖片
步驟1：加載測試文檔
Presentation ppt = new Presentation(); ppt.LoadFromFile("test.pptx");
步驟2：將形狀保存為圖片
//遍歷第一張幻燈片中的所有圖形 for (int i = 0; i < ppt.Slides[0].Shapes.Count; i++) { //獲取幻燈片中的圖形，並保存為.png格式的圖片 Image image = ppt.Slides[0].Shapes.SaveAsImage(i); image.Save(String.Format("Picture-{0}.png", i), System.Drawing.Imaging.ImageFormat.Png); }
全部代碼：
using Spire.Presentation; using System; using System.Drawing; namespace SaveShapesAsImgs_PPT { class Program { static void Main(string[] args) { //實例化Presentation類的對象，並加載測試文檔 Presentation ppt = new Presentation(); ppt.LoadFromFile("test.pptx"); //遍歷第一張幻燈片中的所有圖形 for (int i = 0; i < ppt.Slides[0].Shapes.Count; i++) { //獲取幻燈片中的圖形，並保存為.png格式的圖片 Image image = ppt.Slides[0].Shapes.SaveAsImage(i); image.Save(String.Format("Picture-{0}.png", i), System.Drawing.Imaging.ImageFormat.Png); } } } }
（本文完）
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