Disable hyperlink in .NET

Question

Right, please don't point me there: Disable a HyperLink from code behind

My problem is as follows. I have a hyperlink on my aspx page:

<asp:HyperLink Visible='<%= _myUser.hasPermission("Intranet Management")%>' Text="Intranet Management" runat="server" NavigateUrl="/Apps/Admin/Default.aspx" />

_myUser.hasPermission("Intranet Management") returns boolean with value of TRUE or FALSE depends if a current user has that permission or not. _myUser is declared in aspx.cs file as protected member so I am able to access it from aspx file.

On my page I am getting following error:

Parser Error Message: Cannot create an object of type 'System.Boolean' from its string representation '<%= _myUser.hasPermission("Intranet Management") %>' for the 'Visible' property.

Is there any other way of doing that in aspx file? Please don't ask me to do it in the code behind, I have my reasons to do it here...

Thanks for any help.

Could you please tell the reasons? If you want to do something the wrong way, please provide at least why — Oskar Kjellin, Jul 29 '11 at 13:52
At some point I will be using sql data source to populate list of links using repeater, and instead of "Intranet Management" etc I will be passing an app name pulled from DB... — Daniel Gruszczyk, Jul 29 '11 at 13:54
That is still not a reason. It is meant to be done from code behind as well — Oskar Kjellin, Jul 29 '11 at 13:56

score 4 · Accepted Answer · answered Jul 29 '11 at 13:55

4

The problem you're facing is that asp:Hyperlink is a server control, and these wont evaluate code inside <%= %> for their properties. They will databind though IIRC, so you could try

<asp:HyperLink Visible='<%# _myUser.hasPermission("Intranet Management")%>'...

And make sure to call Page.DataBind().

answered Jul 29 '11 at 13:55

Jamiec

133,658
13
134
193

Thanks, that worked, I ended up using different approach after all but I am marking your reply as answer anyway. Thanks! – Daniel Gruszczyk Aug 01 '11 at 08:05

score 3 · Answer 2 · answered Jul 29 '11 at 13:55

In order to do it this way, you cannot have runat="server". The idea is that server-side controls will be modified using code behind.

If you don't want to use code behind, use a regular <a> tag without runat="server". There doesn't seem to really be any reason why you need a server control here anyway.

score 1 · Answer 3 · edited May 23 '17 at 12:04

1

use the following instead:

<%# _myUser.hasPermission("Intranet Management") %>

Got it from here

edited May 23 '17 at 12:04

Community

1
1

answered Jul 29 '11 at 13:55

Arief

6,055
7
37
41

Simon Dugré · Answer 4 · 2011-07-29T15:21:48.560

1

This should work ...

<asp:HyperLink ID="HyperLink1" Visible='<%# Convert.ToBoolean(_myUser.hasPermission("Intranet Management")) %>' Text="Intranet Management" runat="server" NavigateUrl="/Apps/Admin/Default.aspx" />

Perhaps this is better after all

<a style='<%= Convert.ToBoolean(_myUser.hasPermission("Intranet Management")) ? "" : "display:none;" %>' href="Apps/Admin/Default.aspx"> Intranet Management </a>

edited Jul 29 '11 at 15:21

answered Jul 29 '11 at 15:02

Simon Dugré

17,980
11
57
73

Disable hyperlink in .NET

4 Answers4