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POAccessing Event Handlers from Two Different Master Pages
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  1. POAccessing Event Handlers from Two Different Master Pages
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    copied!<p>I have a ASP.NET content page where the master page is set dynamically. Both master pages contain a print button and an associated event handler for the click event of the button. Unfortunately I receive a run-time error when I attempt to dynamically access the event from the master page that was not initially assigned.</p> <p>Below are code snippets:</p> <pre><code> &lt;%@ Page Language="VB" MasterPageFile="~/Evaluators/masEvaluators.master" AutoEventWireup="false" CodeFile="EDF_Instructions.aspx.vb" Inherits="Evaluators_EDF_Instructions" Title="EDF - Instructions" %&gt; Page_Load(): Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim strPageTitle As String = "Evaluator Data Form - Instructions" If Page.MasterPageFile.Contains("masEvaluators.master") Then Dim mp As Evaluators_masEvaluators = CType(Me.Master, Evaluators_masEvaluators) AddHandler mp.SaveEDF, AddressOf imgbtnPrint_Click ElseIf Page.MasterPageFile.Contains("masStaff.master") Then Dim mp As Evaluators_masEvaluators = CType(Me.Master, Evaluators_masEvaluators) CType(Page.Master.FindControl("imgbtnPrint"), ImageButton).Visible = True AddHandler mp.SaveEDF, AddressOf imgbtnPrint_Click End If </code></pre> <p>which produces the following error when I load the page and reference the "masStaff.master" master page:</p> <p><code>System.InvalidCastException: Unable to cast object of type 'ASP.staff_masstaff_master' to type 'Evaluators_masEvaluators'. at Evaluators_EDF_Instructions.Page_Load....</code></p> <p>I can solve the problem by adding a print button to the content page, but that defeats the purpose of using a master page. </p> <p>Is there a solution to this problem? I have spent many hours researching this issue on the web, but have not found a solution as of yet.</p>
 

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