添加项目文件。

Szmedi.RvKits/Samples/CreateSketch.csx

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+    // 创建几何线，无需在事务中
+    XYZ Point1 = XYZ.Zero;
+    XYZ Point2 = new XYZ(10, 0, 0);
+    XYZ Point3 = new XYZ(10, 10, 0);
+    XYZ Point4 = new XYZ(0, 10, 0);
+
+    Line geomLine1 = Line.CreateBound(Point1, Point2);
+    Line geomLine2 = Line.CreateBound(Point4, Point3);
+    Line geomLine3 = Line.CreateBound(Point1, Point4);
+
+    // 几何平面无需开启事务
+    XYZ origin = XYZ.Zero;
+    XYZ normal = new XYZ(0, 0, 1);
+    Plane geomPlane = Plane.CreateByNormalAndOrigin(normal, origin);
+
+    // 为了在草图平面绘制模型线，需要开启事务
+
+    // 所有的事务都应该包含在 'using' 块中
+    // 或者在 try-catch-finally 块中进行保护
+    // 以保证事务不会超出其作用域。
+    using (Transaction transaction = new Transaction(doc))
+    {
+        if (transaction.Start("创建模型线") == TransactionStatus.Started)
+        {
+            // 在当前文档中创建草图平面
+            SketchPlane sketch = SketchPlane.Create(doc,geomPlane);
+
+            // 使用几何线和草图平面创建模型线
+            ModelLine line1 = doc.Create.NewModelCurve(geomLine1, sketch) as ModelLine;
+            ModelLine line2 = doc.Create.NewModelCurve(geomLine2, sketch) as ModelLine;
+            ModelLine line3 = doc.Create.NewModelCurve(geomLine3, sketch) as ModelLine;
+
+            // Ask the end user whether the changes are to be committed or not
+            TaskDialog taskDialog = new TaskDialog("Revit");
+            taskDialog.MainContent = "点击 [确定] 提交，或 [取消] 回滚事务。";
+            TaskDialogCommonButtons buttons = TaskDialogCommonButtons.Ok | TaskDialogCommonButtons.Cancel;
+            taskDialog.CommonButtons = buttons;
+
+            if (TaskDialogResult.Ok == taskDialog.Show())
+            {
+            // 由于多种原因，如果事务期间所做的更改未导致有效模型，则事务可能无法提交。
+            // 如果提交事务失败或被最终用户取消，结果状态将是 RolledBack 而不是 Committed。
+            // 创建一些几何线。不需要在文档事务中创建。
+            XYZ Point1 = XYZ.Zero;
+            XYZ Point2 = new XYZ(10, 0, 0);
+            XYZ Point3 = new XYZ(10, 10, 0);
+            XYZ Point4 = new XYZ(0, 10, 0);
+
+            Line geomLine1 = Line.CreateBound(Point1, Point2);
+            Line geomLine2 = Line.CreateBound(Point4, Point3);
+            Line geomLine3 = Line.CreateBound(Point1, Point4);
+
+            // 这个几何平面也是事务性的，不需要事务
+            XYZ origin = XYZ.Zero;
+            XYZ normal = new XYZ(0, 0, 1);
+            Plane geomPlane = Plane.CreateByNormalAndOrigin(normal, origin);
+
+            // 为了在草图平面绘制模型线，需要开启事务
+
+            // 所有的事务都应该包含在 'using' 块中
+            // 或者在 try-catch-finally 块中进行保护
+            // 以保证事务不会超出其作用域。
+            using (Transaction transaction = new Transaction(doc))
+            {
+                if (transaction.Start("创建模型线") == TransactionStatus.Started)
+                {
+                    // 在当前文档中创建草图平面
+                    SketchPlane sketch = SketchPlane.Create(doc, geomPlane);
+
+                    // 使用几何线和草图平面创建 ModelLine 元素
+                    ModelLine line1 = doc.Create.NewModelCurve(geomLine1, sketch) as ModelLine;
+                    ModelLine line2 = doc.Create.NewModelCurve(geomLine2, sketch) as ModelLine;
+                    ModelLine line3 = doc.Create.NewModelCurve(geomLine3, sketch) as ModelLine;
+
+                    // 询问最终用户是否要提交更改
+                    TaskDialog taskDialog = new TaskDialog("Revit");
+                    taskDialog.MainContent = "点击 [确定] 提交，或 [取消] 回滚事务。";
+                    TaskDialogCommonButtons buttons = TaskDialogCommonButtons.Ok | TaskDialogCommonButtons.Cancel;
+                    taskDialog.CommonButtons = buttons;
+
+                    if (TaskDialogResult.Ok == taskDialog.Show())
+                    {
+                        // 由于多种原因，如果事务期间所做的更改未导致有效模型，则事务可能无法提交。
+                        // 如果提交事务失败或被最终用户取消，结果状态将是 RolledBack 而不是 Committed。
+                        if (TransactionStatus.Committed != transaction.Commit())
+                        {
+                            TaskDialog.Show("失败", "事务无法提交");
+                        }
+                    }
+                    else
+                    {
+                        transaction.RollBack();
+                    }
+                }
+            }
+
+            return "完成";
+                if (TransactionStatus.Committed != transaction.Commit())
+                {
+                    TaskDialog.Show("失败", "事务无法提交");
+                }
+            }
+            else
+            {
+                transaction.RollBack();
+            }
+        }
+    }
+    
+    return "完成";