如何从DWG文件提取文本？需批量对比4000个标签与Excel

Hey there! Dealing with 4000 tags manually sounds like a total nightmare—let’s get you set up with automated ways to extract DWG text and compare it to your Excel file. Since you already have DWG TrueView, we’ll start with that, plus cover other tools and even a script if you’re up for it.

DWG TrueView actually has a powerful command for this, no extra software needed right away:

• Open your DWG file in DWG TrueView
• Type the command DATAEXTRACTION into the command line and hit Enter
• Follow the wizard step-by-step:
  1. Choose "Create a new data extraction" and name your extraction set
  2. Select the DWG files you need (you can add multiple at once for batch processing)
  3. Filter the object types to only include text elements—look for TEXT and MTEXT (these are the most common tag types)
  4. Pick the fields you want to export; at minimum, you’ll need the Text Content field
  5. Export the results as a CSV file—this will open directly in Excel

Once you have the CSV in Excel, you can use tools like VLOOKUP or conditional formatting to compare against your existing tag list. For example, use =IF(ISNA(VLOOKUP(A2, YourTagList!$A:$A, 1, FALSE)), "Mismatch", "Match") to flag missing or unmatched tags quickly.

If you need to handle a ton of DWGs quickly, these free tools are perfect for non-technical users:

• DWGSee Free: This lightweight viewer has a dedicated "Extract Text" feature that works in batches. You can select multiple DWGs, choose to extract all text, and save the output as a TXT or CSV file. It’s intuitive and gets the job done fast.
• ODA File Converter: From the Open Design Alliance, this free tool can convert DWGs to other formats, but it also lets you extract text. Just set the output format to "Text", select your batch of files, and it’ll spit out a text file per DWG (or combine them if you prefer) that you can import straight into Excel.

If you want total control and to automate the entire workflow (extract + compare), use the ezdxf library (free and open-source). Here’s a quick script to get you started:

1. First, use the ODA File Converter to batch-convert all your DWGs to DXF files (ezdxf works best with DXF)
2. Run this Python script to extract all text:

import ezdxf
import csv
import os

# Set your folder path with DXF files
input_folder = "path/to/your/dxf/files"
output_csv = "dwg_tags_extracted.csv"

with open(output_csv, "w", newline="", encoding="utf-8") as csv_file:
    writer = csv.writer(csv_file)
    writer.writerow(["File Name", "Tag Text"])

    # Loop through all DXF files in the folder
    for filename in os.listdir(input_folder):
        if filename.endswith(".dxf"):
            file_path = os.path.join(input_folder, filename)
            try:
                doc = ezdxf.readfile(file_path)
                model_space = doc.modelspace()
                # Grab all TEXT and MTEXT entities
                for text_entity in model_space.query("TEXT MTEXT"):
                    # Get the actual text content
                    if text_entity.dxftype() == "TEXT":
                        tag_text = text_entity.dxf.text
                    else: # MTEXT
                        tag_text = text_entity.plain_text()
                    writer.writerow([filename, tag_text])
            except Exception as e:
                print(f"Error processing {filename}: {e}")

3. Import the resulting CSV into Excel, then use Power Query or pivot tables to quickly compare against your existing tag list.

Whichever method you pick, you’ll cut down hours of manual work to just a few minutes. Good luck!

内容的提问来源于stack exchange，提问作者JOHN