Hello Rick,
I agree with Laurent, in ASP.NET you have many choices to finish the work,
however, we recommend that you make use of the ASP.NET server controls and
use control model and postback events to manipulate control states.
For your scenario, you can use the DropDownList control to display list
items and use the dropdownlist control's "SelectedIndexChanged" event to
change other control's states/properties:
#DropDownList Class
http://msdn2.microsoft.com/en-us/lib...rols.dropdownl
ist.aspx
for example, here is a test page which contains two dropdownlist, when the
first dropdownlist's selected item has changed, the second dropdownlist
will be hidden or showed according to the first list's selected value:(I've
also attached the complete page's aspx and cs file in this message, you can
get it if you're using Outlook express to visit the newsgroup):
==============aspx page===================
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button" /><br />
<br />
ASP.NET server control means:<br />
<hr />
<asp:DropDownList ID="lstServer1" runat="server"
AutoPostBack="True"
OnSelectedIndexChanged="lstServer1_SelectedIndexCh anged">
<asp:ListItem>show</asp:ListItem>
<asp:ListItem>hide</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList ID="lstServer2" runat="server">
<asp:ListItem>aaa</asp:ListItem>
<asp:ListItem>bbb</asp:ListItem>
<asp:ListItem>ccc</asp:ListItem>
</asp:DropDownList>
<br />
</div>
</form>
</body>
</html>
======code behind (c#) ====================
public partial class databind_ListControlPage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void lstServer1_SelectedIndexChanged(object sender, EventArgs
e)
{
if (lstServer1.SelectedIndex == 0)
{
lstServer2.Visible = true;
}
else
{
lstServer2.Visible = false;
}
}
}
==========================
Please feel free to let me know if there is anything unclear or if there is
anyother information you wonder.
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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