您可以使用Autodesk Forge的Model Derivative API将DWG文件上的多个布局转换为PDF。以下是一个示例代码，使用C#编写：

using System;
using System.IO;
using Autodesk.Forge;
using Autodesk.Forge.Model;

public class ForgeAPI
{
    private const string CLIENT_ID = "YOUR_CLIENT_ID";
    private const string CLIENT_SECRET = "YOUR_CLIENT_SECRET";
    private const string BUCKET_KEY = "YOUR_BUCKET_KEY";
    private const string FILE_NAME = "YOUR_DWG_FILE_NAME.dwg";
    private const string OUTPUT_FILE_NAME = "OUTPUT_PDF_FILE_NAME.pdf";

    public async Task ConvertDWGToPDF()
    {
        TwoLeggedApi oauth = new TwoLeggedApi();
        ApiResponse tokenResponse = await oauth.AuthenticateAsync(CLIENT_ID, CLIENT_SECRET, "client_credentials", new[] { Scope.DataRead, Scope.DataWrite, Scope.ViewablesRead });

        if (tokenResponse.StatusCode != HttpStatusCode.OK)
        {
            Console.WriteLine("Authentication failed with error: " + tokenResponse.Error.Message);
            return;
        }

        dynamic token = tokenResponse.Content;
        string accessToken = token.access_token;

        // Step 1: Create a new bucket (if it doesn't exist)
        BucketsApi bucketsApi = new BucketsApi();
        bucketsApi.Configuration.AccessToken = accessToken;

        PostBucketsPayload bucketPayload = new PostBucketsPayload(BUCKET_KEY, null, PostBucketsPayload.PolicyKeyEnum.Transient);
        try
        {
            dynamic createBucketResponse = await bucketsApi.CreateBucketAsync(bucketPayload, "US");
        }
        catch (ApiException ex)
        {
            if (ex.ErrorCode != 409) // Bucket already exists
            {
                Console.WriteLine("Failed to create bucket with error: " + ex.Message);
                return;
            }
        }

        // Step 2: Upload the DWG file to the bucket
        ObjectsApi objectsApi = new ObjectsApi();
        objectsApi.Configuration.AccessToken = accessToken;

        string filePath = "PATH_TO_DWG_FILE";
        using (StreamReader fileStream = new StreamReader(filePath))
        {
            dynamic uploadObjectResponse = await objectsApi.UploadObjectAsync(BUCKET_KEY, FILE_NAME, (int)fileStream.BaseStream.Length, fileStream.BaseStream, "application/octet-stream");
        }

        // Step 3: Translate the DWG file to PDF
        JobPayload jobPayload = new JobPayload(
            new JobPayloadInput(BUCKET_KEY, FILE_NAME),
            new JobPayloadOutput(
                new JobPayloadOutputPayload(JobPayloadOutputPayload.ViewsEnum._2d),
                new JobPayloadOutputFormat(JobPayloadOutputFormat.TypeEnum.Pdf),
                new JobPayloadOutputDestination(JobPayloadOutputDestination.DestinationEnum.Oss),
                new JobPayloadOutputOptions(JobPayloadOutputOptions.AutodeskSpecific))
            );

        DerivativesApi derivativesApi = new DerivativesApi();
        derivativesApi.Configuration.AccessToken = accessToken;

        try
        {
            dynamic translateResponse = await derivativesApi.TranslateAsync(jobPayload);
        }
        catch (ApiException ex)
        {
            Console.WriteLine("Failed to translate DWG to PDF with error: " + ex.Message);
            return;
        }

        // Step 4: Check the translation status and download the PDF file
        dynamic manifest = null;
        while (manifest == null || manifest.progress != "complete")
        {
            await Task.Delay(2000); // Wait for 2 seconds before checking the status again

            manifest = await derivativesApi.GetManifestAsync(URN.EncodeBase64(BUCKET_KEY + FILE_NAME));
        }

        string pdfUrn = null;
        foreach (KeyValuePair derivative in manifest.derivatives)
        {
            if (derivative.Value.outputType == "pdf")
            {
                pdfUrn = derivative.Value.urn;
                break;
            }
        }

        if (pdfUrn == null)
        {
            Console.WriteLine("Failed to find PDF derivative in the manifest.");
            return;
        }

        dynamic pdfObject = await derivativesApi.GetObjectAsync(URN.EncodeBase64(pdfUrn));

        using (Stream pdfStream = new FileStream(OUTPUT_FILE_NAME, FileMode.Create))
        {
            await pdfObject.Content.CopyToAsync(pdfStream);
        }

        Console.WriteLine("PDF conversion completed.");
    }
}

请确保将以下变量替换为您的实际值：

• YOUR_CLIENT_ID：您的Autodesk Forge应用程序的客户端ID。
• YOUR_CLIENT_SECRET：您的Autodesk Forge应用程序的客户端密钥。
• YOUR_BUCKET_KEY：您要使用的存储桶的唯一键。
• YOUR_DWG_FILE_NAME.dwg：您要转换为PDF的