访问父中继器DataItem属性

Question

我有一个控制器有一个Repeater，rptReferrals，它贯穿实体对象列表，引用。 Referrals对象具有对称为Answers的另一个表的引用，该表是为用户提交的Answers的列表。 rptReferrals会将一个子转发器rptQuestionnaire绑定到我登录的人的问题列表，该人员没有连接到它绑定的引用对象。

下面是ASPX代码：

<asp:Repeater runat="server" ID="rptReferrals" OnItemDataBound="rptReferrals_OnItemDataBound"> 
    <ItemTemplate> 
     //some HTML for the referral object 
     <asp:Repeater runat="server" ID="rptQuestionnaire" OnItemDataBound="rptQuestionnaire_OnItemDataBound"> 
       //some HTML for displaying questions and answers 
     </asp:Repeater> 
    </ItemTemplate> 
</asp:Repeater> 

后端代码：

protected void rptReferrals_OnItemDataBound(object sender, RepeaterItemEventArgs e) 
{ 
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) 
    { 
     //THIS IS THE ITEM THAT HAS THE LIST OF ANSWERS I NEED 
     var data = e.Item.DataItem as PatientReferral; 
     var rptQuestionnaire = e.Item.FindControl("rptQuestionnaire") as Repeater; 
     rptQuestionnaire.DataSource = QuestionList; 
     rptQuestionnaire.DataBind(); 

     //QuestionList is a list of questions populated on page load. 
     // I can't bind to the property of data.Answers because not 
     //all questions are answered. data.Answers is only a list of 
     //the questions answered 
    } 
} 

protected void rptQuestionnaire_OnItemDataBound(object sender, RepeaterItemEventArgs e) 
{ 
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) 
    { 
     Need to access the data.Answers object from above. HOW???? 
    } 
} 

我遇到的问题是不需要的问题清单，我需要显示所有问题无论用户是否回答。但是，如果他们确实回答了，我需要显示答案，这是rptReferrals附加的属性。

有关如何访问我的父直放站的数据项属性的任何想法？我会在这一点上回答。

Answer 1

您可以使用RepeaterItem控件的.Parent属性工作，直到外部RepeaterItem（因此它的DataItem）。

好像这样的工作：

protected void rptQuestionnaire_OnItemDataBound(object sender, RepeaterItemEventArgs e) 
{ 
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) 
    { 
     Repeater currentRepeater = (Repeater)sender; 
     // Note that you might only need one ".Parent" here. Or you might need 
     // more, depends on your actual markup. 
     var data = ((RepeaterItem)e.Item.Parent.Parent).DataItem as PatientReferral; 
     // Now you have access to data.Answers from the parent Repeater 
    } 
}