Linq查询从Sql数据库返回重复记录

Question

我正在尝试将三个linq查询连接到单个查询中，并将记录显示到角度js应用程序中。但问题是当我输入帐号并单击提交按钮时，它还会显示重复记录。

这是Linq查询：

public string TranscationDetails(string Account_Number)
{
    var accountNumber = int.Parse(Account_Number);//It could be better to use TryParse
    using (HalifaxDatabaseEntities context = new HalifaxDatabaseEntities())
    {
        var CombinedQuery = (from x in context.Current_Account_Deposit
                             join y in context.Current_Account_Withdraw on x.Account_Number equals y.Account_Number
                             join z in context.Current_Account_Details on y.Account_Number equals z.Account_Number
                             where x.Account_Number == accountNumber
                             select new
                             {
                                 x.Account_Number,
                                 x.Amount,
                                 Amount1 = y.Amount,
                                 z.Account_Balance,
                             }).ToList();

        var js = new System.Web.Script.Serialization.JavaScriptSerializer();
        return js.Serialize(CombinedQuery); // return JSON string
    }
}

有人在此链接上建议我.. http://www.advancesharp.com/blog/1108/linq-inner-join-left-outer-join-on-two-lists-in-c-with-example 这是数据库记录截图：

这是我点击带帐号的按钮时屏幕截图，Linq查询也显示重复记录。

Answer 1

可能你可以使用这个类

的概念

ReturnClass 
{ 
     Current_Account_Details detail {get;set;} 
     List<Current_Account_Withdraw> listofwithdraw {get;set;}
     List<Current_Account_Deposit> listofdeposit {get;set;} }
}

示例:(代码可能无效：D） 我将使用lambda

    context.Current_Account_Details.Select(x => new
   {
       x.Account_Number,
       detail = x,
       listofwithdraw = x.Current_Account_Withdraw.ToList(),
       listofdeposit = x.Current_Account_Deposit.ToList()
   }).ToList();