ASP.NET Querystrings - asp.net

Question

I got this code in order to build an url for the link using a querystring from the current page. The problem is.... It doens't work. Any suggestions?
<asp:hyperlink ID="link1" runat="server" NavigateUrl='<%#("Equipamentos.aspx?ID_Cliente=")+Request.QueryString ("ID_Cliente").trim.tostring()%>'>Equipamentos</asp:HyperLink>

Answer 1

Gah, my eyes! Try doing this in code behind instead:
link1.NavigateUrl = "Equipamentos.aspx?ID_Cliente=" & Request.QueryString("ID_Cliente").Trim().ToString()
You have to use "&" instead of "+" because this is VB.NET, not C#.

Answer 2

Your ASP.NET code should look like this:
<asp:HyperLink ID="link1" runat="server" NavigateUrl=''>Equipamentos</asp:HyperLink>
And then add this in code behind:
this.link1.NavigateUrl = string.Format("Equipamentos.aspx?ID_Cliente={0}", Request.QueryString["ID_Cliente"].Trim());

Answer 3

Try this instead :
<asp:hyperlink ID="link1" runat="server"
NavigateUrl='<%= ("Equipamentos.aspx?ID_Cliente=")
+ Request.QueryString("ID_Cliente").Trim().ToString() %>'>
Equipamentos</asp:HyperLink>

Answer 4

The
<%# %>
tags are for directives, such as registering controls. You need a
<%= %>
tag, which is called a code evaluation block.
Something like
<%= (5+5).ToString() %>
is what you need - try your code in there.

Answer 5

You are not going to be able to set the NavigateUrl of the link in this way. Try something like this:
<asp:hyperlink
ID="link1"
runat="server">Equipamentos</asp:HyperLink>
And then in your codebehing or a script tag do this:
link1.NavigateUrl = "Equipamentos.aspx?ID_Cliente="
+ Request.QueryString("ID_Cliente").Trim().ToString();

Answer 6

As I know you can't use "<%= %>" with server controls. So you can:
1. Leave it as a server control and follow Andrew Hare's (or similar) answer.
2. Use client control: "<a />" and "<%= %>" should work.