泛型方法动态生成表达式树 Expression

public string GetGridJSON(TraderInfo model)
{
EF_DAL.Custom_Expression CE = new EF_DAL.Custom_Expression();
var traderInfoList = db.TraderInfo.Where(CE.Custom_Equal<TraderInfo>("LoginAccount,ShopName", model.LoginAccount, model.ShopName)).ToList();
return JsonConvert.SerializeObject(traderInfoList, Formatting.Indented, new JsonSerializerSettings() { DateFormatHandling = 0 });
}