连接两个表实体框架

我正在尝试使用LINQ在实体框架中连接两个表

模型如下:

    public partial class PredbiljezbeEF
    {
        public int idPredbiljezba { get; set; }
        public Nullable<System.DateTime> datumPredbiljezba { get; set; }
        public string imePolaznik { get; set; }
        public string prezimePolaznik { get; set; }
        public string gradPolaznik { get; set; }
        public string adresaPolaznik { get; set; }
        public Nullable<int> postanskiBrojPolaznik { get; set; }
        public Nullable<bool> statusPredbiljezba { get; set; }
        public int idSeminar { get; set; }
        public virtual SeminariEF SeminariEF { get; set; }
    }
        public partial class SeminariEF
    {
        public SeminariEF()
        {
            this.PredbiljezbeEFs = new HashSet<PredbiljezbeEF>();
        }
        public int idSeminar { get; set; }
        public string nazivSeminar { get; set; }
        public string opisSeminar { get; set; }
        public string datumSeminar { get; set; }
        public Nullable<bool> statusSeminar { get; set; }
        public Nullable<int> brojPredbiljezbi { get; set; }

下面是LINQ表达式:

        if(!IsPostBack)
        {
            SeminariEntities db = new SeminariEntities();
            var predB = (from x in db.PredbiljezbeEFs
                         join y in db.SeminariEFs on x.idSeminar equals y.idSeminar
                         select new
                         {
                             id = x.idPredbiljezba,
                             ime = x.imePolaznik,
                             prez = x.prezimePolaznik,
                             datum = x.datumPredbiljezba,
                             grad = x.gradPolaznik,
                             adresa = x.adresaPolaznik,
                             post = x.postanskiBrojPolaznik,
                             status = x.statusPredbiljezba,
                             naziv = y.nazivSeminar,
                             datumS = y.datumSeminar
                         }).ToList();



            //var predB = (from x in db.PredbiljezbeEFs select x).ToList();
            gvPredbiljezbe.DataSource = predB.ToList();
            gvPredbiljezbe.DataBind();

        }

我得到这个错误:

DataBinding: '<>f__AnonymousType0 10[[System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Nullable 1[[System.]DateTime, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]， mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]，[System. DateTime]，String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]，[System. net]。String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]，[System. net]。可空1[[System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Nullable 1[[系统。Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]， mscorlib, Version=4.0.0.0, Culture=n…'不包含名称为'idPredbiljezba'的属性。

谁来帮帮我。