​中望CAD Python 自动化实战：参数化批量出图与标题栏自动填充方案

pip install pywin32 pandas openpyxl

import win32com.client

# 启动中望CAD或连接到已运行的实例
zwcad = win32com.client.Dispatch("ZWCAD.Application")
# 获取当前活动文档
doc = zwcad.ActiveDocument
# 获取模型空间（ModelSpace），所有图形对象在此创建
ms = doc.ModelSpace

import pandas as pd

# 读取Excel图纸清单
df = pd.read_excel("D:/Project/图纸清单.xlsx", sheet_name="Sheet1")

# 图框块名称（需在模板文件中预先定义为带属性的块参照）
BLOCK_NAME = "A3_TITLE_BLOCK"

for idx, row in df.iterrows():
    # 图框插入点（每张图Y方向偏移420mm = A3图框高度+间距）
    insert_point = win32com.client.VARIANT(pythoncom.VT_ARRAY | pythoncom.VT_R8,
                                           [0.0, -idx * 420.0, 0.0])
    # 插入图框块参照
    block_ref = ms.InsertBlock(insert_point, BLOCK_NAME, 1, 1, 1, 0)

    # 遍历块的属性并填充
    attrs = block_ref.GetAttributes()
    for attr in attrs:
        tag = attr.TagString.upper()
        if tag == "DWG_NO":
            attr.TextString = str(row["图号"])
        elif tag == "DWG_NAME":
            attr.TextString = str(row["图名"])
        elif tag == "DESIGNER":
            attr.TextString = str(row["设计"])
        elif tag == "DATE":
            attr.TextString = str(row["日期"])

print(f"完成：{len(df)} 张图框已生成")

# 缩放到全部图形范围
zwcad.ZoomExtents()

for attr in block_ref.GetAttributes():
    print(f"Tag: {attr.TagString}, Value: {attr.TextString}")

{
    "grid_name": "轴网-01",
    "x_spacing": [4200, 3600, 3600, 4200],
    "y_spacing": [6000, 2400, 6000],
    "x_labels": ["1", "2", "3", "4", "5"],
    "y_labels": ["A", "B", "C", "D"],
    "extension": 2500,
    "circle_radius": 400
}

import json

with open("D:/Project/grid_config.json", "r", encoding="utf-8") as f:
    cfg = json.load(f)

def add_line(start, end):
    """在中望CAD模型空间中添加直线"""
    return ms.AddLine(
        win32com.client.VARIANT(pythoncom.VT_ARRAY | pythoncom.VT_R8, list(start)),
        win32com.client.VARIANT(pythoncom.VT_ARRAY | pythoncom.VT_R8, list(end))
    )

def add_circle(center, radius):
    """添加圆（用于轴线编号）"""
    return ms.AddCircle(
        win32com.client.VARIANT(pythoncom.VT_ARRAY | pythoncom.VT_R8, list(center)),
        radius
    )

# 计算累积坐标
x_coords = [0]
for sp in cfg["x_spacing"]:
    x_coords.append(x_coords[-1] + sp)

y_coords = [0]
for sp in cfg["y_spacing"]:
    y_coords.append(y_coords[-1] + sp)

ext = cfg["extension"]
cir_r = cfg["circle_radius"]

# 绘制垂直轴线（沿X方向偏移）
for i, x in enumerate(x_coords):
    y_min = y_coords[0] - ext
    y_max = y_coords[-1] + ext
    add_line((x, y_min, 0), (x, y_max, 0))
    # 底部编号圆
    add_circle((x, y_min - cir_r * 2, 0), cir_r)

# 绘制水平轴线（沿Y方向偏移）
for i, y in enumerate(y_coords):
    x_min = x_coords[0] - ext
    x_max = x_coords[-1] + ext
    add_line((x_min, y, 0), (x_max, y, 0))
    # 左侧编号圆
    add_circle((x_min - cir_r * 2, y, 0), cir_r)

print("轴网绘制完成")

import os

output_dir = "D:/Project/PDF_Output"
os.makedirs(output_dir, exist_ok=True)

# 遍历模型空间中所有块参照
for entity in ms:
    if entity.EntityName == "AcDbBlockReference":
        name = entity.Name.upper()
        if "TITLE_BLOCK" not in name and "A3" not in name and "A4" not in name:
            continue  # 跳过非图框块

        # 获取图框包围盒
        bbox = entity.GetBoundingBox()
        min_pt = bbox[0]  # 左下角
        max_pt = bbox[1]  # 右上角

        # 获取图纸编号（从图框属性中提取）
        dwg_no = "unknown"
        for attr in entity.GetAttributes():
            if attr.TagString.upper() == "DWG_NO":
                dwg_no = attr.TextString
                break

        # 设置打印窗口并导出PDF
        layout = doc.ActiveLayout
        plot_cfg = doc.PlotConfigurations.Add(f"TEMP_{dwg_no}")

        # 图幅尺寸判断（A3=420×297, A4=297×210）
        width = max_pt[0] - min_pt[0]
        height = max_pt[1] - min_pt[1]
        paper_name = "A3" if width > 350 else "A4"
        plot_cfg.CanonicalMediaName = paper_name

        # 窗口打印范围
        plot_cfg.PlotWindowArea(
            win32com.client.VARIANT(pythoncom.VT_ARRAY | pythoncom.VT_R8,
                                    [min_pt[0], min_pt[1]]),
            win32com.client.VARIANT(pythoncom.VT_ARRAY | pythoncom.VT_R8,
                                    [max_pt[0], max_pt[1]])
        )

        pdf_path = os.path.join(output_dir, f"{dwg_no}.pdf")
        doc.PlotToFile(pdf_path, plot_cfg.ConfigName)
        print(f"[{dwg_no}] → {pdf_path}")

print(f"PDF导出完成，文件数：{len(os.listdir(output_dir))}")