<%# DataBinder.Eval(Container.DataItem, "FirstName") %> in a fieldof a web server control ?

abargaddon · Jan 28, 2008

Hello everybody,
I need to use bound variables in a field of a web server control which
is inside a template. Many sources in the Web say it works, but for me
it does not, so I have made a test page :

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

public class Bidon
{
public string OwnerId { get { return "111"; } }
public string FirstName { get { return "Alberto"; } }
}

protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
System.Collections.Generic.List<Bidon> listBidon =
new System.Collections.Generic.List<Bidon>();
listBidon.Add(new Bidon());
listBidon.Add(new Bidon());
RepeaterCollection.DataSource = listBidon;
RepeaterCollection.DataBind();
}
}

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Ptitle</title>
</head>
<body>
<form id="form1" runat="server">
<h2>
Test Repeater and templates</h2>
<asp:Repeater ID="RepeaterCollection" runat="server">
<ItemTemplate>
ItemTemplate : <%# DataBinder.Eval(Container.DataItem,
"OwnerId") %>
- <%# DataBinder.Eval(Container.DataItem, "FirstName") %>
<asp:HyperLink ID="HyperLink2" runat="server"
Text='eval (<%# DataBinder.Eval(Container.DataItem,
"OwnerId") %>)' />
<asp:Label ID="Label2" runat="server"
Text='eval (<%# DataBinder.Eval(Container.DataItem,
"FirstName") %>)' />
<br />
</ItemTemplate>
</asp:Repeater>
</form>
</body>
</html>

The result I obtain is below : Eval() does not work inside the asp:label
or the asp:hyperlink Text fields :

Test Repeater and templates
ItemTemplate : 111 - Alberto eval () eval ()
ItemTemplate : 111 - Alberto eval () eval ()

Can anyone help me please ?

Sincerely,
Abargaddon

Milosz Skalecki [MCAD] · Jan 29, 2008

Howdy,

In AP.NET 2.0 you can use Eval instead of DataBinder.Eval. In addition
remember data bound expressions for server controls must be defined in entire
attribute:
<asp:Label runat="server" Text='<%# "prefix " + Eval("whatever") %>'/>
NOT
<asp:Label runat="server" Text='prefix<%# Eval("whatever") %>'/>

Anyway:
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Ptitle</title>
</head>
<body>
<form id="form1" runat="server">
<h2>
Test Repeater and templates</h2>
<asp:Repeater ID="RepeaterCollection" runat="server">
<ItemTemplate>
ItemTemplate : <%# DataBinder.Eval(Container.DataItem,
"OwnerId") %>
- <%# DataBinder.Eval(Container.DataItem, "FirstName") %>
<asp:HyperLink ID="HyperLink2" runat="server" Text='<%#
DataBinder.Eval(Container.DataItem, "OwnerId") %>' />
<asp:Label ID="Label2" runat="server" Text='<%#
String.Format(DataBinder.Eval(Container.DataItem, "FirstName"), "Surrounding
{0} text" %>' />
<asp:Label ID="Label3" runat="server" Text='<%# Eval("FirstName") %>'
<br />
</ItemTemplate>
</asp:Repeater>
</form>
</body>
</html>

Hope it helps

abargaddon · Feb 2, 2008

Hi Milosz,

Thank you a lot, this was indeed my problem.
However, I did not find it mentioned in the MSDN site, although it is an
important detail !

Thank you again, and have a nice sunday.
Abargaddon

Milosz Skalecki [MCAD] a Ã©crit :

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<%# DataBinder.Eval(Container.DataItem, "FirstName") %> in a fieldof a web server control ?

abargaddon

Milosz Skalecki [MCAD]

abargaddon

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