Accessing masterpage properties from child pages in ASP.net VB

I have masterpage.master.vb where I have properties, such as;

 Private _SQLerror As String
    Public Property SQLerror() As String
        Get
            Return _SQLerror
        End Get
        Set(ByVal value As String)
            _SQLerror = String.Empty

        End Set
    End Property

Then I have an aspx page in which I need to use this property in, such as;

 If **[masterpage property sqlerror]** = Nothing Then
            InternalSQLErrLabel.Text = ("No Errors Reported")
        End If

Can anyone give me an idea how to go about this? I've tried searching but most articles talk in the context of web controls...

Thanks.

Solution

Here you go:

How to: Reference ASP.NET Master Page Content

From the article, it looks like

If Master.SQLerror = Nothing Then
    InternalSQLErrLabel.Text = ("No Errors Reported")
End If

should work for you.

Just be sure to add the MasterType directive as described or you might get a type conversion error. (Or you could use a variable of your master page type instead of Master, as daRoBBie suggests in his answer.)

I have created a test Web site just to test this out, and it works. Here is the full source of the site:

^{Site1.Master:}

<%@ Master Language="VB" AutoEventWireup="false" CodeBehind="Site1.master.vb" Inherits="WebApplication1.Site1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        This is the Master Page content.
        <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
        </asp:ContentPlaceHolder>
    </div>
    </form>
</body>
</html>

Site1.Master.vb:

Public Partial Class Site1
    Inherits System.Web.UI.MasterPage

    Private _SQLerror As String

    Public Property SQLerror() As String
        Get
            Return _SQLerror
        End Get
        Set(ByVal value As String)
            _SQLerror = String.Empty
        End Set
    End Property
End Class

WebForm1.aspx:

<%@ Page Title="" Language="vb" AutoEventWireup="false" MasterPageFile="~/Site1.Master"
    CodeBehind="WebForm1.aspx.vb" Inherits="WebApplication1.WebForm1" %>

<%@ MasterType VirtualPath="~/Site1.Master" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    This is the Content Page content.
    <asp:Label ID="InternalSQLErrLabel" runat="server" Text="Label"></asp:Label>
</asp:Content>

WebForm1.aspx.vb:

Public Partial Class WebForm1
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Master.SQLerror = Nothing Then
            InternalSQLErrLabel.Text = ("No Errors Reported")
        End If
    End Sub

End Class