Solved

Read Anonymous Type from DataItem?

Posted on 2009-04-09
3
1,353 Views
Last Modified: 2013-11-11
I'm attempting to load a page with a datalist nested into a repeater. What I want to do is create the datasource for the datalist on the itemdatabound event of the repeater. It's working however I need to filter my datasource down based on a value in my repeater's itemtemplate (SubCategory). I would like to read the value from the e.Item.DataItem. SubCategory into a string but for whatever reason, I can't seem to get it, although I can see it in the watch window.

// aspx
<asp:Repeater ID="rptItems" runat="server" OnItemDataBound="rptItems_ItemDataBound">
                    <ItemTemplate>
                        <h2><%# Eval("SubCategory") %> /></h2>
                        <asp:DataList ID="dlSubList" runat="server"
                            RepeatDirection="Vertical" RepeatColumns="4">
                            <HeaderTemplate>
                                <ul>
                            </HeaderTemplate>
                            <ItemTemplate>
                                <li><%# Eval("ListItem")%></li>
                            </ItemTemplate>
                            <FooterTemplate>
                                </ul>
                            </FooterTemplate>
                        </asp:DataList>
                    </ItemTemplate>
                </asp:Repeater>
 
private List<ItemData> m_Items; // populated from db
 
// code for repeater data
rptList.DataSource = (from i in m_Items select new {i.SubCategory}).Distinct();
rptList.DataBind();
                                
protected void rptItems_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
        string sSubCategory = e.Item.DataItem ???? How do I get the SubCategory value from the anonymous type? 
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            DataList dl = (DataList)e.Item.FindControl("dlSubList");
            var oList = (from p in m_Items as List<PDFIndexRecord>
                         where p.SubCategory.Equals(sSubCategory)
                         select p).ToList();
            dl.DataSource = oList;
            dl.DataBind();
        }
}

Open in new window

0
Comment
Question by:Turgeson
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 23

Expert Comment

by:Jens Fiederer
ID: 24118846
Have you tried just ToString()?  

That is a method of ANY object.
0
 
LVL 9

Expert Comment

by:Sreedhar Vengala
ID: 24128731
As Jensfiederer said:
If you need a string value that should be doable. The watch window tends to display values by calling .ToString on the object. If the value in the watch window is the string you want then you should be able to get it by simply calling ToString.

var item = e.Item.DataItem.ToString();

You'd need to do a null check on the various properties as well.
0
 

Accepted Solution

by:
Turgeson earned 0 total points
ID: 24130233
I tried that but it didn't work like I needed it to.  It did create a non-null object with properties and values but it didn't give me a way to access them in my code. If I put a break in the event handler and run item.SubCategory in the immediate window and it gives me nothing (no error, empty string, null), just nothing. After a lot of trial and error I was able to it to work with this using Reflection:

object oSubCategory = e.Item.DataItem.GetType().GetProperties()[2].GetValue(e.Item.DataItem, null); // 2 = SubCategory

and then use the .ToString() method on the object. Kind of a round about way to a property but it works in the context I need.
0

Featured Post

Creating Instructional Tutorials  

For Any Use & On Any Platform

Contextual Guidance at the moment of need helps your employees/users adopt software o& achieve even the most complex tasks instantly. Boost knowledge retention, software adoption & employee engagement with easy solution.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For those of you who don't follow the news, or just happen to live under rocks, Microsoft Research released a beta SDK (http://www.microsoft.com/en-us/download/details.aspx?id=27876) for the Xbox 360 Kinect. If you don't know what a Kinect is (http:…
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…

717 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question