DbSet.Cast() Error: Cannot create a DbSet from a non-generic DbSet for objects of type 'Entity'

Question

Version Info:

I am using C# 4.5, Entity Framework 6.0, and MEF.

Code and Unit Test

I created a Test Project to expl

Answer 1

As I wasn't able to cast a generic DbSet to a typed DbSet I used instead a typed IQueryable which can do the same things I needed from the DbSet.

Here is a extension that can get you that:

    public static IQueryable GetIQueryableByTableName(this DbContext context, string tableName)
    {
        var type = Assembly.GetExecutingAssembly().GetTypes().FirstOrDefault(t => t.Name == tableName);
        if (type == null)
        {
            throw new Exception("GetIQueryableByTableName received an invalid table name.");
        }
        return context.GetType().GetMethod("Set", new Type[0]).MakeGenericMethod(type).Invoke(context, new object[0]) as IQueryable;
    }