使用IDocumentFilter和Swashbuckle.AspNetCore.SwaggerGen包中的SwaggerDocument.Filter方法来手动过滤映射路由。代码示例如下：

using Swashbuckle.AspNetCore.SwaggerGen;
using System.Linq;

public class Filters : IDocumentFilter
{
    public void Apply(SwaggerDocument swaggerDoc, DocumentFilterContext context)
    {
        var ignoreRoutes = context.ApiDescriptions
                                    .Where(x => x.ControllerAttributes()
                                                 .OfType()
                                                 .Any(y => y.IgnoreApi))
                                    .Select(x => "/" + x.RelativePath.TrimEnd('/'))
                                    .ToList();
  
        foreach (var ignoreRoute in ignoreRoutes)
        {
            var route = swaggerDoc.Paths.Keys
                                       .SingleOrDefault(x => x.Contains(ignoreRoute));
  
            if (route != null)
            {
                swaggerDoc.Paths.Remove(route);
            }
        }
    }
}

要在Startup.cs的ConfigureServices方法中添加以下行来注册Filter：

services.AddSwaggerGen(c =>
{
    c.SwaggerDoc("v1", new OpenApiInfo { Title = "My API", Version = "v1" });
    c.DocumentFilter();
});