Question

I’ve had a look around on StackOverlow but haven’t been able to find a definitive answer on this.

Below I have a code snippet of what I currently have, and I will explain what I am trying to achieve.

Table<Gallery> galleries = pdc.GetTable<Gallery>();
Table<GalleryImage> images = pdc.GetTable<GalleryImage>();
Table<Comment> comments = pdc.GetTable<Comment>();

var query = from gallery in galleries
            join image in images on gallery.id equals image.galleryid into joinedimages
            join comment in comments on gallery.id equals comment.galleryid into joinedcomments
            select gallery;

gallst.DataSource = query;
gallst.DataBind();

From the above I then have the following repeater:

<asp:Repeater ID="gallst" runat="server" EnableViewState="false">
    <HeaderTemplate>
        <div id="gallery">
    </HeaderTemplate>
    <ItemTemplate>
        <div class="item">
            <h2><%# DataBinder.Eval(Container.DataItem, "name") %> @ <%# DataBinder.Eval(Container.DataItem, "wheretaken") %></h2>
            <ul class="images">
            <asp:Repeater ID="galimgs" runat="server" EnableViewState="false" DataSource='<%# Eval("GalleryImages") %>'>
                <ItemTemplate>
                    <li><a href="<%# DataBinder.Eval(Container.DataItem, "image") %>.jpg" title="<%# DataBinder.Eval(((System.Web.UI.WebControls.RepeaterItem)Container.Parent.Parent).DataItem, "name") %>" rel="prettyPhoto[<%# DataBinder.Eval(Container.DataItem, "galleryid")%>]" class="thickbox"><img src="<%# DataBinder.Eval(Container.DataItem, "image") %>_thumb.jpg" /></a></li>
                </ItemTemplate>
            </asp:Repeater>
            </ul>
            <div class="comments">
            <asp:Repeater ID="galcomments" runat="server" EnableViewState="false" DataSource='<%# Eval("Comments") %>'>
                <HeaderTemplate>
                    <ul>
                </HeaderTemplate>
                <ItemTemplate>
                    <li><%# GetUserName(new Guid(Eval("userid").ToString())) %> said: <%#DataBinder.Eval(Container.DataItem, "comment1") %> (<%# DataBinder.Eval(Container.DataItem, "date", "{0:dddd  MM, yyyy hh:mm tt}") %>)</li>
                </ItemTemplate>
                <FooterTemplate>
                    </ul>
                </FooterTemplate>
            </asp:Repeater>
            <uc:makecomment ID="mcomment" runat="server" PhotoID='<%# DataBinder.Eval(Container.DataItem, "id") %>'></uc:makecomment>
        </div>
        </div>
    </ItemTemplate>
    <FooterTemplate>
        </div>
    </FooterTemplate>
</asp:Repeater>

What I want to do (ideally) is to only take the first 3 comments for each gallery.

I’ve tried the following LINQ Query with no luck:

var query = from gallery in galleries
            join image in images on gallery.id equals image.galleryid into joinedimages
            join comment in comments.Take(3) on gallery.id equals comment.galleryid into joinedcomments
            select gallery;

Does anyone have any suggestions on how I can achieve this?

Answer 1

I managed to get it to work with:

        Table<Gallery> galleries = pdc.GetTable<Gallery>();
        Table<GalleryImage> images = pdc.GetTable<GalleryImage>();
        Table<Comment> comments = pdc.GetTable<Comment>();

        var query = from gallery in galleries
                    join image in images on gallery.id equals image.galleryid into joinedimages
                    join comment in comments on gallery.id equals comment.galleryid into joinedcomments
                    select new
                    {
                        name = gallery.name,
                        wheretaken = gallery.wheretaken,
                        id = gallery.id,
                        GalleryImages = joinedimages,
                        Comments = joinedcomments.Take(3)
                    };

        gallst.DataSource = query;
        gallst.DataBind();

With the take taken place on the select. Thanks for your help everyone. Any suggestions on how to write this “better” would be appreciated.