[Mono-list] Bug in ASP.NET? Please take a look.

Maurizio Colucci seguso.forever@tin.it
Thu, 26 Jun 2003 12:30:34 +0200 

Hello, 

this seems like a bug in asp.net postback mechanism.

I'm using mono 0.24 from debianplanet packages, and xsp from cvs.

To reproduce the bug:

1. in xsp, start the following aspx page.

2. Select an exam, e.g. "calculus".

3. Click "view subscriptions". The list of subscription correctly appears. 

4. Now click "view subscriptions" again, _without_ changing the
selection (i.e. leave "calculus" selected). An error message appears,
complaining that there was no exam selected. But it was!


Am I doing somehting wrong, or is it a mono bug?





<%@ language="C#" %>

<script runat="server" >

void Page_Load(Object Source, EventArgs E) { 
	if (!IsPostBack){
		#region fill the listbox exams
		exams.Items.Clear();
		exams.Items.Add(new ListItem( "math"));
		exams.Items.Add(new ListItem( "calculus"));
		exams.Items.Add(new ListItem( "english"));	
		message_subscriptions.Visible=false;
		subscriptions.Visible=false;
		#endregion
	}
	else{
		if (exams.SelectedIndex >=0){	
			
			message_subscriptions.Visible=true;
			subscriptions.Visible=true;
			message.Text="";
			message_subscriptions.Text = "Subscriptions to \"" + exams.SelectedItem.Text + "\" are:";
			subscriptions.Items.Clear();
			subscriptions.Items.Add(new ListItem( "John"));
			subscriptions.Items.Add(new ListItem( "Jack"));
		}
		else{
			message.Text = "<h2>Error: no item selected. SelectedIndex = " + 
				exams.SelectedIndex + " </h2>";
		}
	}
}
</script>

<html>

<body>
<asp:label id=message runat=server ForeColor=red/>
<h1>Mono test page</h1>
Select an exam, then click "view subscriptions".
<form runat=server>
<p><asp:listbox id="exams" runat=server  />

<p> <input type=submit value="View subscriptions">
<p><asp:label id="message_subscriptions" runat=server />
<p><asp:listbox id="subscriptions" runat=server  />

</form>

</body>

</html>