If $ isn't allowed within a ImageButton.ID, why doesn't ASP.Net helps me with this?

[Edward Smit]

Dear all

I've found a problem with raising server-events from a LinkButton (although I suspect that other Controls have the same problem). It appears that if you set the ID property with a string containing "$" that the Server-Side events aren't fired. This is probably caused by the fact that the Javascript __doPostBack expects the $-sign to be used for some Control-identification magic. Now if this is the case I would expect ASP.Net to either raise an exception when I try to set the ID with such an invalid character, or do some kind of escaping to make sure it works transparantly for me. Below the code behind for a WebForm with which I've tested this. The aspx only contains a Panel named MyPanel. Does anyone know if this is something I could have known

using System
using System.Collecti ons
using System.Componen tModel
using System.Data
using System.Drawing
using System.Web
using System.Web.Sess ionState
using System.Web.UI
using System.Web.UI.W ebControls
using System.Web.UI.H tmlControls

namespace LinkButtonTes

public class WebForm1 : System.Web.UI.P ag

protected Panel MyPanel

private void Page_Load(objec t sender, System.EventArg s e

LinkButton lb = new LinkButton()
lb.ID = "_Edward$Test$X "
lb.Click += new EventHandler(lb _Click)
lb.Text = "CLICK which doesn't work"
MyPanel.Control s.Add(lb)

LiteralControl lc = new LiteralControl( "<br/>")

MyPanel.Control s.Add(lc)

LinkButton lb2 = new LinkButton()
lb2.ID = "_EdwardTes tX"
lb2.Click += new EventHandler(lb _Click)
lb2.Text = "CLICK which works"
MyPanel.Control s.Add(lb2)
#region Web Form Designer generated cod
!!!REMOVED for clarity!!
#endregio

private void lb_Click(object sender, EventArgs e

LiteralControl lc = new LiteralControl( "<br/>Hello")
MyPanel.Control s.Add(lc)

[Edward Smit]

Hi Bin

I'm aware of the fact that the contents of the ID of an HTML-tag is bound by rules, however, I'm using an ASP.Net Server-Control here. Although it ultimately will become an HTML-control, it's a more abstract concept, and I have the opinion that it's up to the creator of the ServerControl to make sure that the ID-property is correct, either by documenting what the allowed characters are and generating an Exception if I don't confirm to that, or make sure that by the time it gets converted to an HTM-Id it is in a correct form.