通過IQueryable<T>獲得DbContext

/*廢話不多說直接上代碼*/
using System;
using System.Data.Entity;
using System.Data.Entity.Core.Objects;
using System.Data.Entity.Infrastructure;
using System.Data.Entity.Infrastructure.Interception;
using System.Linq;
using System.Reflection;

namespace Lomeo.EntityFramework.Extensions
{
    public static class Efext
    {
        public static DbContext GetContext<TEntity>(this IQueryable<TEntity> query) where TEntity : class
        {
            if (!(query is ObjectQuery<TEntity> objectQuery))
            {
                if (!(query is DbQuery<TEntity> dbQuery))
                {
                    throw new Exception("未能從IQueryable表達式找到DbContext。您確定此表達式來自Ef DbContext嗎?");
                }
                var propers = dbQuery.GetType().GetProperty("InternalQuery", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
                if (propers == null)
                {
                    throw new Exception("未能從IQueryable表達式找到DbContext。您確定此表達式來自Ef DbContext嗎?");
                }
                var obj = propers.GetValue(dbQuery, null);
                propers = obj.GetType().GetProperty("ObjectQuery", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
                if (propers == null)
                {
                    throw new Exception("未能從IQueryable表達式找到DbContext。您確定此表達式來自Ef DbContext嗎?");
                }
                objectQuery = propers.GetValue(obj, null) as ObjectQuery<TEntity>;
                if (objectQuery == null)
                {
                    throw new Exception("未能從IQueryable表達式找到DbContext。您確定此表達式來自Ef DbContext嗎?");
                }
            }
            return objectQuery.Context.GetDbContext();
        }
        private static DbContext GetDbContext(this ObjectContext objc)
        {
            if (!(objc.GetType().GetProperty("InterceptionContext", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)?.GetValue(objc, null) is DbInterceptionContext interceptionContext))
                return null;
            return interceptionContext.DbContexts.FirstOrDefault<DbContext>();
        }
    }
}