好，您需要加载上下文，因为它需要调用 OnModelBuilding（DbModelBuilder）至少要做一次生意；

Well, you need to load the context because it needs to call OnModelBuilding(DbModelBuilder) at least once to do it's business; otherwise there is no model to interrogate.

如果需要，可以使用 EdmxWriter ;

If you want, you can store off the information as XML using EdmxWriter;

    public static string ToEdmx(this System.Data.Entity.DbContext context)
    {
        var sb = new StringBuilder();

        using (var textWriter = new StringWriter(sb))
        using (var xmlWriter = System.Xml.XmlWriter.Create(textWriter, new System.Xml.XmlWriterSettings { Indent = true, IndentChars = "    " }))
        {
            System.Data.Entity.Infrastructure.EdmxWriter.WriteEdmx(context, xmlWriter);
            textWriter.Flush();
        }

        return sb.ToString();
    }

这将为您提供带有数据模型的XML文档。您可能可以通过一个进程将其保存到磁盘，然后在TT文件中查询该文件。

This will give you an XML document with the data model. You can probably save that to disk in one process, and interrogate that file in your TT file.