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change color

Added By: onestepup

Rated:

(3 of 5) by 5.

Rate Snippet: 12345

Description:

Change color

Language: Visual Basic .NET

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Code Snippet:

<%@ Page Language="VB" debug=true%>
<%@ Import Namespace="System.Drawing.Color" %>

<html><body>
   <form runat="server">
      <asp:Listbox runat="server" id="lbColors"
         width="150"
         AutoPostBack=true
         rows="1"
         SelectionMode="Single"
         OnSelectedIndexChanged="Index_Changed" >
         <asp:Listitem value="1">Red</asp:Listitem>
         <asp:Listitem value=" 2" selected="True">Blue</asp:Listitem>
         <asp:Listitem value=" 3">Green</asp:Listitem>
         <asp:Listitem value=" 4">Yellow</asp:Listitem>
      </asp:Listbox><p>

<font color="<%# lbColors.selectedItem.Text %>" >
      <asp:Label id="lblMessage" runat="server"
         Text='<%# lbColors.selectedItem.Text %>' />
</font>
   </form>
<br>
This is an amazing little bit of code.  I want to set the color of the 
label to the selection in the listbox.  This exhibits two problems.
First, I want to set the ForeColor property to the initial color.  But
I can't get the selected property in the Page_Load subroutine.  At
Page_Load time, it is not available.  <br>
So, I set it explicitly with Me.lblMessage.ForeColor = Blue.  Be sure
to Import Namespace="System.Drawing.Color", otherwise Blue (or any 
other color) is not available.  Also, strings such as "Blue" are 
not recognized by System.Drawing.Color, you actually need to use
the word in your code, but you can't accept a user string.  Therefore,
I used a <font color= > tag to place the string color word and change 
the color.  I think that this task would actually be eaiser with asp 3.0.

</body></html>