A master page that creates a GUID on the first request (VB)

<%@ Page Language="VB" MasterPageFile="~/Default.master" %>

<script runat="server" language="vb">
    Protected Sub Page_LoadComplete(ByVal sender As Object, _
       ByVal e As System.EventArgs)

        Label1.Text = CType(Master.FindControl("Label1"), Label).Text
    End Sub
  
    Protected Sub Button1_Click(ByVal sender As Object, _
       ByVal e As System.EventArgs)

        Label2.Text = "<b>Hello " & TextBox1.Text & "!</b>"
    End Sub
</script>

<asp:Content ID="Content1" ContentPlaceHolderId="ContentPlaceHolder1" Runat="server">
    <b>Your GUID number from the master page is:<br />
    <asp:Label ID="Label1" Runat="server" /></b>
    <b>Enter your name:</b><br />
    <asp:Textbox ID="TextBox1" Runat="server" />
    <asp:Button ID="Button1" Runat="server" Text="Submit" 
     OnClick="Button1_Click" /><br />
    <asp:Label ID="Label2" Runat="server" />
</asp:content>

<asp:Content ID="Content2" ContentPlaceHolderId="ContentPlaceHolder2" Runat="server">
        <asp:Image ID="Image1" Runat="server" ImageUrl="http://www.java2s.com/style/logo.png" />
</asp:Content>


File: Default.master

<%@ Master Language="VB" %>

<script runat="server">
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)     
        If Not Page.IsPostBack Then
            Label1.Text = System.Guid.NewGuid().ToString()
        End If
    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>My Company Master Page</title>
</head>
<body>
    <form id="form1" runat="server">
        <table>
            <tr>
                <td colspan="2">
                    <b>User's GUID:
                    <asp:Label ID="Label1" Runat="server" /></b>
                </td>
            </tr>
            <tr>
                <td>
                    <asp:ContentPlaceHolder ID="ContentPlaceHolder1" Runat="server"/>
                </td>
                <td>
                    <asp:ContentPlaceHolder ID="ContentPlaceHolder2" Runat="server"/>
                </td>
            </tr>
            <tr>
                <td colspan="2">
                    Copyright 2006 - My Company
                </td>
            </tr>
        </table>
    </form>
</body>
</html>

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A master page that creates a GUID on the first request (VB) : Master page « User Control and Master Page « ASP.Net

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