[Mono-bugs] [Bug 77278][Nor] New - Setting masterpage in OnPreInit causes null reference exceptions when referencing controls on the page

Mon Jan 16 18:35:34 EST 2006

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Changed by joe_audette at yahoo.com.

http://bugzilla.ximian.com/show_bug.cgi?id=77278

--- shadow/77278	2006-01-16 18:35:34.000000000 -0500
+++ shadow/77278.tmp.15296	2006-01-16 18:35:34.000000000 -0500
@@ -0,0 +1,165 @@
+Bug#: 77278
+Product: Mono: Class Libraries
+Version: 1.1
+OS: All
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: Sys.Web
+AssignedTo: gonzalo at ximian.com                            
+ReportedBy: joe_audette at yahoo.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Setting masterpage in OnPreInit causes null reference exceptions when referencing controls on the page
+
+Please fill in this template when reporting a bug, unless you know what you
+are doing.
+Description of Problem:
+If you set the MasterPage for a page in the OnPreInit, the page loses its
+references to controls on the page.
+
+
+Steps to reproduce the problem:
+1. Create a page that uses a master page and set the master page in the
+OnPreInit
+2. Add any control, a label for example to the page and try to set its
+.Text property in Page_Load event
+
+
+Actual Results:
+You will get a null reference exception at the line of code where you set
+the.Text property of the control
+
+
+Expected Results:
+You will still be able to reference the controls on the page
+
+
+How often does this happen? 
+Every time
+
+
+Additional Information:
+Example code that produces the problem on mono using the 2.0 runtime but
+works on windows
+
+Default.aspx:
+<%@ Page Language="C#" MasterPageFile="simple.master" %>
+
+<script runat="server">
+
+
+override protected void OnPreInit(EventArgs e)
+{
+
+    //this is a bug 
+    //it works as expected on windows but
+    //causes a null reference in the page load event on mono
+    
+    base.OnPreInit(e);
+    this.MasterPageFile = "simple2.master";
+
+}
+
+override protected void OnInit(EventArgs e)
+{
+
+    base.OnInit(e);
+    
+
+
+}
+
+
+private void Page_PreInit (object sender, EventArgs e)
+{
+	this.MasterPageFile = "simple2.master";
+
+
+}
+
+
+private void Page_Load (object sender, EventArgs e)
+{
+	lblHelloWeb.Text = "Hello Web!";
+	
+	//TestKey
+
+}
+
+private void btnTestConfig_Click (object sender, EventArgs e)
+{
+	//this displays the value on windows but not on mono  r55575
+	this.lblTestConfig.Text =
+System.Configuration.ConfigurationSettings.AppSettings.Get("TestKey");
+	
+	
+
+}
+
+
+</script>
+
+<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1"
+Runat="server">
+
+Contents go here
+<hr />
+<asp:Label id="lblHelloWeb" runat="server" />
+<hr />
+<asp:Button id="btnTestConfig" runat="server" OnClick="btnTestConfig_Click"
+Text="Test Config"  />
+<asp:Label id="lblTestConfig" runat="server" />
+
+</asp:Content>
+
+simple.Master:
+<%@ Master Language="C#"%>
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
+"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml" >
+<head runat="server">
+    <title>Simple Master Page</title>
+</head>
+<body>
+    <form id="form1" runat="server">
+    <div>
+		What's inside the following box is a placeholder:
+		<div style='border:solid 2px red; padding:10px'>
+        <asp:contentplaceholder id="ContentPlaceHolder1"
+runat="server"></asp:contentplaceholder>
+		</div>
+		That's all!
+    </form>
+</body>
+</html>
+
+simple2.Master:
+<%@ Master Language="C#"%>
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
+"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml" >
+<head runat="server">
+    <title>Simple Master Page</title>
+</head>
+<body>
+    <form id="form1" runat="server">
+    <h3>Simple2</h3>
+    <div>
+		What's inside the following box is a placeholder:
+		<div style='border:solid 2px red; padding:10px'>
+        <asp:contentplaceholder id="ContentPlaceHolder1"
+runat="server"></asp:contentplaceholder>
+		</div>
+		That's all!
+    </form>
+</body>
+</html>
