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1、下载CadLib相关dll文件，主要用到的：WW.dll、WW.Cad.dll、WW.GL.dll

2、程序中引用dll库。

3、创建WPF程序，使用Canvas来加载dwg文件，支持拖动和放大缩小。

4、部分代码：

public void Init(string filename)
{try{string extension = System.IO.Path.GetExtension(filename);if (string.Compare(extension, ".dwg", true) == 0){model = DwgReader.Read(filename);}else{model = DxfReader.Read(filename);}#region calculate the model's bounds to determine a proper dots per inch// The dots per inch value is important because it determines the eventual pen thickness.graphicsConfig = (GraphicsConfig)GraphicsConfig.WhiteBackgroundCorrectForBackColor.Clone();BoundsCalculator boundsCalculator = new BoundsCalculator();if (model.ActiveLayout == null || model.Header.ShowModelSpace){boundsCalculator.GetBounds(model);}else{boundsCalculator.GetBounds(model, model.ActiveLayout);}bounds = boundsCalculator.Bounds;WW.Math.Vector3D delta = bounds.Delta;Size estimatedCanvasSize = new Size(500d, 500d);double estimatedScale = Math.Min(estimatedCanvasSize.Width / delta.X, estimatedCanvasSize.Height / delta.Y);graphicsConfig.DotsPerInch = 100d / estimatedScale;#endregiongraphicsCache = new WireframeGraphics2Cache(false, false);graphicsCache.Config = graphicsConfig;if (model.ActiveLayout == null || model.Header.ShowModelSpace){graphicsCache.CreateDrawables(model, Matrix4D.Identity);}else{graphicsCache.CreateDrawables(model, model.ActiveLayout);}wpfGraphics = new WpfWireframeGraphics3DUsingDrawingVisual();wpfGraphics.Config = graphicsConfig;this.Dispatcher.Invoke(() => {canvas.Children.Add(wpfGraphics.Canvas);canvas.SizeChanged += canvas_SizeChanged;});UpdateWpfGraphics();}catch (Exception ex){this.Dispatcher.Invoke(() => {msg.Text = $"文件加载出现异常，详细：{ex.Message}";});}
}

如果想设置文字颜色，在Read后增加代码：

foreach (DxfEntity entity in model.Entities){// 检查实体是否为DxfText或DxfMTextif (entity is DxfText textEntity){// 设置DxfText的颜色textEntity.Color = EntityColors.Red; // 替换为你想要的颜色}else if (entity is DxfMText mTextEntity){// 设置DxfMText的颜色mTextEntity.Color = EntityColors.Red; // 替换为你想要的颜色}}

5、Demo地址

WPF程序通过CadLib4加载CAD.dwg格式文件资源-CSDN文库