解析OpenXml Pptx的边框虚线转为WPF的边框虚线问题

这篇文章主要介绍了OpenXml Pptx的边框虚线转为WPF的边框虚线,在文中用PPTX的7种直线，分别设置7种能够设置的虚线类型，具体实例代码跟随小编一起看看吧

安装Openxml sdk

首先，我们先安装nuget的需要的有关的Openxml sdk，我们开源了解析pptx的Openxml拍平层，下面两种方式都可以安装：

nuget包管理器控制台：

Install-Package dotnetCampus.DocumentFormat.OpenXml.Flatten -Version 2.0.0

csproj引用：

解析Pptx

我这里用PPTX的7种直线，分别设置7种能够设置的虚线类型,PPTX的显示效果是这样的：

然后解析代码如下,解析主要逻辑部分：

 private void PptxToGeometry(string filePath) { if (!File.Exists(filePath) || !filePath.EndsWith(".pptx", StringComparison.OrdinalIgnoreCase)) { return; } var lines = new List(); using var presentationDocument = PresentationDocument.Open(filePath, false); var presentationPart = presentationDocument.PresentationPart; var presentation = presentationPart?.Presentation; var slideIdList = presentation?.SlideIdList; if (slideIdList == null) { return; } foreach (var slideId in slideIdList.ChildElements.OfType()) { var slidePart = (SlidePart)presentationPart.GetPartById(slideId.RelationshipId); var slide = slidePart.Slide; foreach (var shapeProperties in slide.Descendants()) { var presetGeometry = shapeProperties.GetFirstChild(); if (presetGeometry != null && presetGeometry.Preset.HasValue) { if (presetGeometry.Preset == ShapeTypeValues.StraightConnector1) { var transform2D = shapeProperties.GetFirstChild(); var extents = transform2D?.GetFirstChild(); if (extents != null) { var width = new Emu(extents.Cx!.Value).ToPixel().Value; var height = new Emu(extents.Cy!.Value).ToPixel().Value; var presetDash = shapeProperties.GetFirstChild()?.GetFirstChild()?.Val; var dashArray = GetDashArrayByPresetLineDashValues(presetDash); var line = ConverterToGeometry( width, height, dashArray); lines.Add(line); } } } } } this.ListBox.ItemsSource = lines; }

PPTX映射成WPF虚线的方法：

 private DoubleCollection GetDashArrayByPresetLineDashValues(PresetLineDashValues presetLineDashValues) { DoubleCollection dashStyle = presetLineDashValues switch { PresetLineDashValues.Solid => new(), PresetLineDashValues.Dot => new() { 0, 2 }, PresetLineDashValues.Dash => new() { 3, 3 }, PresetLineDashValues.LargeDash => new() { 8, 3 }, PresetLineDashValues.DashDot => new() { 3, 3, 1, 3 }, PresetLineDashValues.LargeDashDot => new() { 7.5, 3.5, 1, 3.5 }, PresetLineDashValues.LargeDashDotDot => new() { 8, 3, 1, 3, 1, 3 }, PresetLineDashValues.SystemDash => new() { 3, 1 }, PresetLineDashValues.SystemDot => new() { 1, 1 }, PresetLineDashValues.SystemDashDot => new() { 2, 2, 0, 2 }, PresetLineDashValues.SystemDashDotDot => new() { 2, 2, 0, 2 }, _ => new DoubleCollection() }; return dashStyle; }

最终绘制线条的方法：

 private Line ConverterToGeometry(double width, double height, DoubleCollection dashDoubleCollection) { var line = new Line { X1 = 0, Y1 = 0, X2 = width, Y2 = height, StrokeDashArray = dashDoubleCollection, Stroke = Stroke, StrokeThickness = StrokeThickness }; return line; }

最终的效果：