Get entity facets and other metadata on runtime

Question

I have .NET 4.0 WinForms Application, and I use Entity Framework 5 with Model First Approach. In VS EF Designer, I have created a dozen or so entities with a lot of scalar prope

Answer 1

This should help you get started, but you'd need to get to debugger and test specifically to get what you need...

A sample code...

using (var db = new MyContext())
{
var objectContext = ((IObjectContextAdapter)db).ObjectContext;

var baseset = objectContext
    .MetadataWorkspace
    .GetEntityContainer(objectContext.DefaultContainerName, DataSpace.CSpace)
    .BaseEntitySets
    .First(meta => meta.ElementType.Name == "YourEntityClassName");

var elementType = objectContext
    .MetadataWorkspace
    .GetEntityContainer(objectContext.DefaultContainerName, DataSpace.CSpace)
    .BaseEntitySets
    .First(meta => meta.ElementType.Name == "YourEntityClassName")
    .ElementType;

EdmMember member = elementType.Members[2];

Facet item;
// if (member.TypeUsage.Facets.TryGetValue(EdmProviderManifest.StoreGeneratedPatternFacetName, false, out item))
if (member.TypeUsage.Facets.TryGetValue("StoreGeneratedPattern", false, out item))
{
    var value = ((StoreGeneratedPattern)item.Value) == StoreGeneratedPattern.Computed;
}

But that's just part of the story.

What I realized is that's working in some cases (thus you need to experiment a bit) depending on what you need. But you also have other spaces in there - e.g. the SSpace. So e.g. for table names this works better...

var ssSpaceSet = objectContext.MetadataWorkspace.GetItems(DataSpace.SSpace).First()
    .BaseEntitySets
    .First(meta => meta.ElementType.Name == "YourTableName");

...and then private Table property.

In your case you should most info in there - but e.g. the above store generated is not populated there - but in some other 'space' I guess (more in one of the links on that).

And take a look at the following links:

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Get Model schema to programmatically create database using a provider that doesn't support CreateDatabase
How I can read EF DbContext metadata programmatically?
How check by unit test that properties mark as computed in ORM model?