如何在DSL T4模板中引用图表？ [英] How do I reference a diagram in a DSL T4 template?

问题描述

在这里，Google并没有帮助我，我只是知道，这是一个完美的询问地点。

Google's not coming to my rescue, here, and I just know this is the perfect place to ask.

我在写DSL的自定义DirectiveProcessor，我希望能够从T4模板中访问图表。

I'm writing a custom DirectiveProcessor for a DSL and I want to be able to access a diagram from within my T4 template.

在DirectiveProcessor中，我已经加载了域模型和图（使用...等待）LoadModelAndDiagram（...）。

Within my DirectiveProcessor, I've loaded the domain model and my diagram using (wait for it...) LoadModelAndDiagram(...).

因此，现在该图已加载到商店的默认分区中，但是我可以在我的一生中，t找出以后如何解决对它的引用。

So, now the diagram's loaded into the default partition in the Store, but I can't for the life of me work out how to resolve a reference to it later.

任何人都可以提供指导吗？

Can anyone guide the way?

推荐答案

嗯，经过大量的后续工作，我决定不需要**从内部访问我的图**一个自定义DirectiveProcessor。

Well, after lots of further work, I decided I didn't need to access my diagram **from within** a custom DirectiveProcessor.

我仍然有一个自定义DirectiveProcessor，因为生成的标准在加载域模型时不会加载现有图。

I've still got a custom DirectiveProcessor because the standard generated one doesn't load the existing diagram when it loads the domain model.

获取自定义DirectiveProcessor来同时加载图和模型非常容易。您可以将生成的标准DirectiveProcessor基类子类化并覆盖：

Getting a custom DirectiveProcessor to load the diagram and model at the same time is trivially easy. You subclass the standard generated DirectiveProcessor base class and override:

protected override bool LoadDiagramData
{
    get
    {
        return true;
    }
}

现在，我们已经加载了图表，因此回到最初的问题，我们如何访问它？像这样：

Now, we have the diagram loaded, so to get back to the original question, how do we access it? Like this:

using (Transaction t = partition.Store.TransactionManager
           .BeginTransaction("MyTxn", true))
{
    MyDslDiagram diagram = partition.ElementDirectory
        .FindElements<MyDslDiagram>(true).SingleOrDefault();

    /*
     * Now, do stuff with your diagram.
     *
     */
}

现在，此代码有效如果您已加载图表，那很好。否则，图将返回为 null ，在这种情况下，我们要么必须显式加载该图，要么动态创建该图。

Now, this code works just fine if you have a diagram loaded. If you don't, diagram will come back as null, in which case, we either have to load the diagram explicitly or create one dynamically.

在这里，我不讨论它。睡觉后，也许在我的博客上！

I won't go into that, here. Maybe on my blog when I've had some sleep!

这篇关于如何在DSL T4模板中引用图表？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！