Call function in code behind

<%@ Page 
    language=VB 
    debug=true 
    src="ProcsInCodeBehind.vb" 
    Inherits="clsProcsInCodeBehind" 
%>
<script runat=server>
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
    lblMessage1.Text = "Pi to three digits: " & RoundPI(3)
    lblMessage2.Text = "Circumference of a 4cm Radius Circle: " _
        & CircleCircumference(4)
    lblMessage3.Text = SystemInfo()
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Creating and Linking to a Code-Behind Files</TITLE>
</HEAD>
<form runat="server">
<BR><BR>
<asp:label
    id="lblMessage1"
    runat="Server"
/>
<BR><BR>
<asp:label
    id="lblMessage2"
    runat="Server"
/>
<BR><BR>
<asp:label
    id="lblMessage3"
    runat="Server"
/>
</form>
</BODY>
</HTML>

<%--
Imports System
Public Class clsProcsInCodeBehind
    Inherits System.Web.UI.Page
    Public Function RoundPI(DecimalPlaces as Integer)
        RoundPI = Math.Round(Math.PI, DecimalPlaces)   
    End Function
    Public Function CircleCircumference(TheRadius as Double) _
        as Double
        CircleCircumference = 2 * TheRadius * Math.PI
    End Function
    Public Function SystemInfo()
        SystemInfo = "Machine Name: " & Server.MachineName _
            & "<BR>Current Script Timeout: " _
            & Server.ScriptTimeOut & " seconds<BR>Path to Page: " _
            & Server.MapPath("") & "<BR>System Date/Time: " _
            & Date.Now()
    End Function
End Class

--%>

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Call function in code behind : Code Behind « Development « ASP.Net

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