ASP.NET Querystrings

Question

Hey guys... 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

Try this instead :

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

Answer 2

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 3

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 4

Same question - Do you mean it crashes with an error message or gives you a link but not the one you want ?

Answer 5

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 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.