Solved

Comparing data in a repeater

Posted on 2010-11-18
4
616 Views
Last Modified: 2012-05-10
I am iterating through a repeater to show college courses.  Each college course may or may not have a category / subcategory, and I am showing/hiding the category/subcategory row based on if there is data found in the field or not.

That seems to be working just fine, but now what I need to do is compare category/subcategory fields to the previous record's category/subcategory to detemine if I should show it or not.

Here's what is showing now:

Category 1
>> Subcategory 1
>> >> Course 1
Category 1
>> Subcategory 1
>> >> Course 2
Category 1
>> Subcategory 1
>> >> Course 3
Category 2
>> Subcategory 1
>> >> Course 1
Category 2
>> Subcategory 2
>> >> Course 1

What I want to show is this:

Category 1
>> Subcategory 1
>> >> Course 1
>> >> Course 2
>> >> Course 3
Category 2
>> Subcategory 1
>> >> Course 1
>> Subcategory 2
>> >> Course 1

In order to do this, I need to compare the category and subcategory fields to the record just before it to determine if it is the same or not, but I don't know how to do that in a repeater. Help?
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)

           {

                string category = DataBinder.Eval(e.Item.DataItem, "category").ToString();

                string subcat = DataBinder.Eval(e.Item.DataItem, "subcategory").ToString();



                if ((category == "") || (category == "0"))

                {

                    ((Literal)e.Item.FindControl("litCategory")).Visible = false;

                }

                else

                {

                    ((Literal)e.Item.FindControl("litCategory")).Visible = true;

                    ((Literal)e.Item.FindControl("litCategory")).Text = "<tr><td colspan='4' align='left'><h4>" +

                        category + "</h4></td></tr>";

                }

               

               if ((subcat == "") || (subcat == "0"))

                {

                   ((Literal)e.Item.FindControl("litSubcategory")).Visible = false;

                }

                else

                {

                    ((Literal)e.Item.FindControl("litSubcategory")).Visible = true;

                    ((Literal)e.Item.FindControl("litSubcategory")).Text = "<tr><td width='5%'>&nbsp;</td><td colspan='3' align='left'><h3><i>" +

                       subcat + "</i></h3></td></tr>";

                }

}

 

        }

Open in new window

<asp:SqlDataSource ID="dsCourses" runat="server" 

            ConnectionString="<%$ ConnectionStrings:ruUtility %>" 

            SelectCommand="sp_courseRecords" SelectCommandType="StoredProcedure">     

        </asp:SqlDataSource>

        

        <asp:Repeater ID="courseDetail" runat="server" DataSourceID="dsCourses" OnItemDataBound="R2_ItemDataBound">

        <HeaderTemplate><table width="95%" cellpadding="3" cellspacing="0" border="0" align="center"></HeaderTemplate>

        <ItemTemplate>

        <asp:Literal ID="litCategory" runat="server"></asp:Literal>

        <asp:Literal ID="litSubcategory" runat="server"></asp:Literal>

        <tr>

        <td width="5%">&nbsp;</td>

        <td align="left" valign="top" width="15%"><asp:Hyperlink ID="hlCourse" runat="server"><%# Eval("subjectID") %>&nbsp;<%# Eval("courseNumber") %>

            </asp:Hyperlink></td>

        <td align="left" valign="top" width="70%">

            <asp:Hyperlink ID="hlCourseName" runat="server"><%# Eval("courseName") %></asp:Hyperlink></td>

        <td align="left" valign="top" width="10%" nowrap="nowrap">.....<asp:Label ID="lblCredits" runat="server"

            Text='<%# Eval("credits") %>'></asp:Label></td>

        </ItemTemplate>

        <FooterTemplate></table></FooterTemplate>

        </asp:Repeater>

Open in new window

0
Comment
Question by:vcbertini
  • 2
  • 2
4 Comments
 
LVL 18

Expert Comment

by:Richard Lee
ID: 34165611
Simple but this might work on entry to your OnDataBound method save the current item in a class field and then you can compare the next item to this one.

DaTribe
0
 

Author Comment

by:vcbertini
ID: 34167070
Hm, I'm new to C# (and writing new classes) - can you give me an example?
0
 
LVL 18

Accepted Solution

by:
Richard Lee earned 500 total points
ID: 34167469
Something like this:

DaTribe
public class Default : System.Web.UI.Page
{
    // Declare variable here to store previous item
    private MyItem PreviousItem { get; set; }

    public void R2_ItemDataBound(...)
    {
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            if(PreviousItem != null)
            {
                // Then we have passed the first item
                // Do something
            }
            ...

            PreviousItem = e.Item.DataItem;
        }
    }
}

Open in new window

0
 

Author Closing Comment

by:vcbertini
ID: 34242480
I think I'm going to try Session Variables first. Thanks.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

User art_snob (http://www.experts-exchange.com/M_6114203.html) encountered strange behavior of Android Web browser on his Mobile Web site. It took a while to find the true cause. It happens so, that the Android Web browser (at least up to OS ver. 2.…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …

911 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

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now