Hi,
In asp classic we could do sth like this to display a block of html code according to a condition statement :
if strName=test then
<table class=Err align=center>
    <tr>
    <td class=font1><%=InvalidUID%></td>
    </tr>
</table>
<%else%>
eee
<%end if%>

Now How can I do sth in an aspx page.??
it may seem simple when using server side controls
but I need to put static html like a table in my code

You will find that a server side control, like a label for instance, renders as a <span></span> tag.

There are (at least) 2 solutions to your answer.

1) Create a panel on your aspx page and name it whatever. In your code behind you can do something like this:

         If strName = "test" then
              Dim tbl as table
              Dim tc as tablecell
              Dim tr as tablerow

              tr = new tablerow
              tc = new tablecell
              tc.text = "Whatever"
              tr.cells.add(tc)
              table.rows.add(tr)
              panel1.controls.add(table)
         Else
             [do something]
         End if

If your condition is met a table will be created at runtime, added to the panel and then displayed (and rendered in HTML) as a table.

The old way of doing things (namely code inline with HTML) still works. But what you ahve to do is on your backend you have to define your variable strName and invalidUID with a global scope and give it Public access so:

Public strName as string
Public InvalidUID as string

Private Sub Page_Load.......
End Sub

Then on your front end you do everything just as you have displayed in your post.

"The one language all programmers understand is profanity."

Thanks.good solution