My datasource is holding a value, but EVAL does not display the value in a label

Question

I have a gridview that has a datasource that is an IENUMERABLE. When I debug and view the results of the datasource, I can see that there is a field that is pulled called strTONumber and it is populated, however when my gridview has a field that uses the EVAL on the field, nothing shows up.

<asp:Label ID="lblTONumber" Text='TO: <%# Eval("strTONumber") %>' runat="server"></asp:Label>

every other item that is pulled through the datasource and displayed using the Eval works, except this one field. Any ideas?

rick schott · Accepted Answer · 2011-11-08T21:05:29.987

4

Here are a few ways:

<asp:Label ID="lblTONumber" Text='<%# Eval("strTONumber", "TO: {0}") %>' runat="server"></asp:Label>

or

<asp:Label ID="lblTONumber" Text='<%# "TO: " + Eval("strTONumber") %>' runat="server"></asp:Label>

or

<asp:Label ID="lblToPrefix" Text='TO:' runat="server"></asp:Label>
<asp:Label ID="lblTONumber" Text='<%# Eval("strTONumber") %>' runat="server"></asp:Label>

or

<asp:Label ID="lblTONumber" Text='<%# AddPreFix(Eval("strTONumber"))%>' runat="server"></asp:Label>

protected string AddPreFix(object txt)
{
    return "TO:" + txt.ToString(); 
}

edited Nov 08 '11 at 21:05

answered Nov 08 '11 at 20:47

rick schott

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Thanks so much! I overlooked that – EvanGWatkins Nov 08 '11 at 20:52
Changed my answer since @Doozer and I had the same solution. – rick schott Nov 08 '11 at 20:53

score 3 · Answer 2 · answered Nov 08 '11 at 20:48

3

Try changing it to

<asp:Label ID="lblTONumber" Text='<%# "TO: " + Eval("strTONumber") %>' runat="server"></asp:Label>

answered Nov 08 '11 at 20:48

Doozer Blake

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My datasource is holding a value, but EVAL does not display the value in a label

2 Answers2