如何为给定实体类型生成绝对OData URL? [英] How do I generate an absolute OData URL for a given entity type?

问题描述

我有一个正常的OData实现，它以典型的方式设置了路由:

I have a working OData implementation with routes setup in the typical way:

var builder = new ODataConventionModelBuilder();
builder.EntitySet<Person>("People");

configuration.Routes.MapODataRoute(routeName:"OData", routePrefix:"odata", model:builder.GetEdmModel());

我正在寻找一种方法，可以从任何OData动作之外以编程方式为注册实体集生成绝对URL .例如，我要请求Person类型的OData端点并返回"http://host/odata/People".

I'm looking for a way to programatically generate an absolute URL for a registered entity set from outside of any OData action. For example, I want to request the OData endpoint for the Person type and get back "http://host/odata/People".

由于OData路由是基于约定的，因此似乎无法使用标准的URL帮助器.

The standard URL helpers don't seem to apply since the OData routing is convention-based.

推荐答案

您可能想利用由ODataConventionModelBuilder.GetEdmModel()生成的IEdmModel实例.

You may want to leverage the IEdmModel instance generated by the ODataConventionModelBuilder.GetEdmModel().

IEdmModel model = builder.GetEdmModel(); // the builder is what you defined in the question.
var entitySetName = "";
foreach (var temp in model.FindEntityContainer("Container").EntitySets())
{
    if (temp.ElementType.Name == "Person")
    {
        entitySetName = temp.Name;
        break;
    }
}
return "http://host/odata/"+entitySetName;

注意:如果您为一个实体类型定义了多个实体集，那么上面的代码只会返回第一个.

Note: if you define more than one entity set for an entity type, the upper code only returns the first one.

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