012集——CAD图中线段坐标导出到txt（CAD—C#二次开发入门）

如图所示，CAD图中line和pline坐标和图层数据导出到txt文本。

程序运行后导出如下文件：

附部分源代码：

public static void DwgToTxt(this Database db)
{
   // var db = Z.db;
    var ed = Z.ed;
    //Point3d pt ;  
    BlockData data = new BlockData();
    List<BlockData> datas = new List<BlockData>();
    List<string> str = new List<string>();
    using (var tr = db.TransactionManager.StartTransaction())
    {
        var bt = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
        var btr = tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForRead) as BlockTableRecord;
        int i = 0;
        int linenum = 1;
        int plinenum = 1;
        foreach (var obj in btr)
        {
            //Double x;
            //double y;
            //Point3d pt = new Point3d(x, y, 0);
            Entity ent = obj.GetObject(OpenMode.ForRead) as Entity;
            if (ent != null)
            {
                if (ent is Curve)
                {
                    if (ent is Line)
                    {
                        str.Add("\n" + linenum + ": Line:\n");
                        Line line = (Line)ent;
                        data.layerName = "图层：" + line.Layer + "\n";
                        data.X = line.StartPoint.X.ToString("F3");
                        data.Y = line.StartPoint.Y.ToString("F3");
                        datas.Add(data);
                        str.Add(datas[i].layerName + datas[i].X + "," + datas[i].Y);
                        i = i + 1;
                        linenum = linenum + 1;
                    }
                    else if (ent is Polyline)
                    {
                        str.Add("\n" + plinenum + "PLine:\n");
                        Polyline pline = (Polyline)ent;
                        for (int k = 0; k < pline.NumberOfVertices; k++)
                        {
                            // Polyline pline = (Polyline)ent;
                            data.layerName = "图层：" + pline.Layer + "\n";
                            data.X = pline.GetPoint3dAt(k).X.ToString("F3") ;
                            data.Y = pline.GetPoint3dAt(k).Y.ToString("F3");
                            datas.Add(data);
                            str.Add(datas[i].layerName + datas[i].X + "," + datas[i].Y);
                            i = i + 1;
                        }
                        plinenum = plinenum + 1;
                    }
                }
            }

        }
    }

    SaveFileDialog savefd;
    DialogResult saveDlgRes;
    db.Sfd(out savefd, out saveDlgRes);
    if (saveDlgRes == Wform.DialogResult.OK)
    {
        string[] contents = new string[str.Count];
        for (int j = 0; j < datas.Count; j++)
        {
            contents[j] = str[j];//datas[j].layerName + ",\n" + datas[j].X + "\n" + datas[j].Y;
        }

        File.WriteAllLines(savefd.FileName, contents);
    }
}

部分方法为个人封装方法，如打开文件对话框，保存文件对话框。部分字段也进行了封装，如定义数据库database db等。

CAD二开插件定制：↓↓↓