ASP.NET Repeater need to alter display - asp.net

Question

I have the following Repeater:
<asp:Repeater ID="rpttsk" runat="server">
<HeaderTemplate>
<tr>
<td>
<b>ID</b>
</td>
<td>
<b>Date</b>
</td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td>
<%#Eval("ID")%>
</td>
<td>
<%#Eval("PerfDate", "{0:MMM d, yyyy}")%>
</td>
</tr>
</ItemTemplate>
</asp:Repeater>
I am putting the code in the code behind file
Protected Sub rpttsk_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles rpttsk.ItemDataBound
but not even hitting this sub procedure

Answer 1

I'd do it this way:
Frontend:
<asp:Repeater ID="rpttsk" runat="server" OnItemDataBound="rpttsk_ItemDataBound">
<HeaderTemplate>
<tr>
<td>
<b>ID</b>
</td>
<td>
<b>Date</b>
</td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td>
<%#Eval("ID")%>
</td>
<td>
<asp:Label ID="lbl" runat="server"/>
</td>
</tr>
</ItemTemplate>
</asp:Repeater>
Backend:
protected void rpttsk_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
{
YourDataType item = e.Item.DataItem as YourDataType;
Label lbl = e.Item.FindControl("lbl") as Label;
lbl.Text = item;
if (DateTime.Compare(item.YourDateHere, DateTime.Now()) > 0)
{
lbl.ForeColor = Color.Red;
}
else
{
lbl.ForeColor = Color.Blue;
}
}
}
If you want entire rows to be coloured, you'll have to put everything in labels.

Answer 2

You can set this logic in code Behind in ItemDataBound
void rpttsk_ItemDataBound(Object Sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
}
}

Answer 3

Choosing the colour to display is a view concern. In general I would put view concern logic into the views rather than the code behinds. It allows for more view flexibility. It can make maintenance easier since cosmetic updates to your applications don't require as many binary updates.
You could technically say that the logic of comparing the date to today is a business logic concern, possibly. So that could be a code behind thing, such as a getter like "IsDateGreaterThanToday".
Then your repeater view could be revised like so:
<td <%# IsViewGreaterThanToday(Eval("PerfDate")) ? "class='greater-than-today'" : ""%>>
<%#Eval("PerfDate", "{0:MMM d, yyyy}")%>
</td>