Finding the datakey of a nested listview control - asp.net

Question

I have a listview control that is bounded by an entity query. The main listview is bounded to the entity called Article. The second listview(nested one) is bounded to an icollection of Article_Comment. I am trying to get the ID of a article so that I can use it in updating the article comment table. Below is what I have so far.
<asp:ListView ID="listComment" runat="server" DataKeyNames="ArticleID" >
<LayoutTemplate>
<div class="row">
<h3>Comments</h3>
<blockquote>
<asp:PlaceHolder runat="server" ID="itemPlaceholder"></asp:PlaceHolder>
</blockquote>
</div>
</LayoutTemplate>
<ItemSeparatorTemplate>
<hr />
</ItemSeparatorTemplate>
<ItemTemplate>
<h4 class="text-error"><%#Eval("Title")%></h4>
<br />
<h4 class="text-error"><%#Eval("ArticleID")%></h4
<br />
<p><%#Eval("ArticleContent")%> </p>
<asp:ListView ID="list" runat="server" DataSource='<%# Eval("Article_CommentTable")%>'
InsertItemPosition="LastItem" OnItemCommand="list_ItemCommand" OnItemDataBound="list_ItemDataBound"
DataKeyNames="ArticleID" OnItemInserting="list_ItemInserting">
<LayoutTemplate>
<div class="row">
<h3>Comments</h3>
<asp:PlaceHolder runat="server" ID="itemPlaceholder"></asp:PlaceHolder>
</div>
</LayoutTemplate>
<ItemTemplate>
<p>
Username : <%#Eval("UserName")%>
<br />
Comments : <%#Eval("Comment")%>
<br />
<%--<asp:Label ID="lblID" runat="server" Text='<%# Bind("ArticleID")%>'></asp:Label>--%>
<asp:HiddenField ID="hid" runat="server" Value='<%# Bind("ArticleID")%>' />
</p>
</ItemTemplate>
<InsertItemTemplate>
<div class="row" runat="server">
<asp:TextBox ID="txtUserName" runat="server" CssClass="form-control" />
<br />
<asp:TextBox ID="txtComment" runat="server" CssClass="form-control" />
<FCKeditorV2:FCKeditor ID="editorArticle" runat="server"
BasePath="~/FCKeditor/" Height="200px" Width="400px"
Value="Start typing here" ToolbarStartExpanded="False">
</FCKeditorV2:FCKeditor>
<br />
<asp:Button ID="btnAddComment" runat="server" CssClass="btn btn-info"
CommandName="insert" Text="Join The Discussion" CommandArgument='<%#Eval("ArticleID")%>' />
</div>
</InsertItemTemplate>
</asp:ListView>
</ItemTemplate>
</asp:ListView>
I am trying to access the ArticleID for each row that a button is clicked. How should I do that?

Answer 1

you can get it in ItemCommand event as listComment.DataKeys[dataItem.DisplayIndex].Value