Conitional statements in listview with eval

[stinkybee]

I am trying to either show or hide a link based on the value of an Eval within my list view

I would like to do something like this

<% if Eval("value") <> "" then %>
display link
<% end if %>

but I cannot use these tags in a listview

I have also tried to do it based on the visible property of the anchor tag

<a href="mylink.aspx" visible="<%# iif(Eval("value") = "", "false", "true")%>">link</a>

but I get this error:
Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.


Any ideas for this?


Web Development Manager

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[jbenson001]

Please show the entire markup for the listview where you have this code

 

[stinkybee]

Here's the code

<asp:ListView ID="ListView2" runat="server" DataSourceID="AccessDataSource2">
	<ItemTemplate>			
		<asp:AccessDataSource id="AccessDataSource3" runat="server" DataFile="db/reviews.mdb" SelectCommand="SELECT * FROM programmes;">
		</asp:AccessDataSource>	
		<div class="review_buttons">
			<div class="review_button">
				<a href="<%# Eval("programmes_link") %>" target="_blank">&rArr; Signup</a>
			</div>
			<div class="review_button review_button_show" id="review_button<%# Eval("programmes_id")%>">
													
				<a href="javascript:CollapseExpand('<% Eval("programmes_id")%>');" visible="<%# IIf(Eval("programmes_review")<>"", "true", "false")%>">&rArr; Show Review</a>
														
			</div>
		</div>
								
	</ItemTemplate>
							
	<LayoutTemplate>							<span runat="server" id="itemPlaceholder" />                  
	</LayoutTemplate>		
</asp:ListView>

So I need to only display the second link if there is a value in "programmes_review".

Web Development Manager

http://www.freemoneyoff.co.uk

http://www.freemoneysurveys.co.uk

http://www.free-money-resource.com

 

[jbenson001]

See this example, I believe it is a syntax issue. You need to be looking at the container.dataitem.

http://stackoverflow.com/questions/...s-eval-xpath-and-bind-can-only-be-used-in-the

 

[stinkybee]

Thanks for the pointer. I was able to work it out from the link. There were a couple of issues but managed to do it by calling a function that set the style property of the containing div.

<div class="review_button review_button_show" id="review_button<%# Eval("programmes_id")%>" style="Display:<%# ShowButton(Eval("programmes_review"))%>">
<a href="javascript:CollapseExpand('<%# Eval("programmes_id")%>');">Show Review</a>
</div>

Function ShowButton(ByVal value As String) As string
   If value = "" Then
       Return "none"
    Else
       Return "true"
    End If	
End Function

Web Development Manager

http://www.freemoneyoff.co.uk

http://www.freemoneysurveys.co.uk

http://www.free-money-resource.com

 

[jbenson001]

Glad you got it working