Here is my error. I have tried something similar in a
larger application I am working on and got similar
results. Thanks for any help in advance.
Server Error in '/WebApplication3' Application.
----------------------------------------------------------
----------------------
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the
execution of the current web request. Please review the
stack trace for more information about the error and
where it originated in the code.
Exception Details: System.NullReferenceException: Object
reference not set to an instance of an object.
Source Error:
Line 39:
Line 40:
Line 41: Label1.Text = WebUserControl1.FirstName
Line 42: Label2.Text = WebUserControl1.LastName
Line 43:
Source File: c:\inetpub\wwwroot\WebApplication3
\WebForm1.aspx.vb Line: 41
Stack Trace:
[NullReferenceException: Object reference not set to an
instance of an object.]
WebApplication3.WebForm1.Button1_Click(Object sender,
EventArgs e) in c:\inetpub\wwwroot\WebApplication3
\WebForm1.aspx.vb:41
System.Web.UI.WebControls.Button.OnClick(EventArgs e)
System.Web.UI.WebControls.Button.System.Web.UI.IPo stBackEv
entHandler.RaisePostBackEvent(String eventArgument)
System.Web.UI.Page.RaisePostBackEvent
(IPostBackEventHandler sourceControl, String
eventArgument)
System.Web.UI.Page.RaisePostBackEvent
(NameValueCollection postData)
System.Web.UI.Page.ProcessRequestMain()
----------------------------------------------------------
----------------------
Version Information: Microsoft .NET Framework
Version:1.1.4322.573; ASP.NET Version:1.1.4322.573
Here is the code for the aspx.
<%@ Page Language="vb" AutoEventWireup="false"
Codebehind="WebForm1.aspx.vb"
Inherits="WebApplication3.WebForm1"%>
<%@ Register TagPrefix="uc1" TagName="WebUserControl1"
Src="WebUserControl1.ascx" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0
Transitional//EN">
<HTML>
<HEAD>
<title>WebForm1</title>
<meta name="GENERATOR" content="Microsoft
Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE"
content="Visual Basic .NET 7.1">
<meta name="vs_defaultClientScript"
content="JavaScript">
<meta name="vs_targetSchema"
content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
<form id="Form1" method="post"
runat="server">
<P>
<uc1:WebUserControl1
id="WebUserControl11"
runat="server"></uc1:WebUserControl1></P>
<P>
<asp:Button id="Button1"
runat="server" Text="Button"></asp:Button></P>
<P>First Name:
<asp:Label id="Label1"
runat="server">Label</asp:Label></P>
<P>Last Name:
<asp:Label id="Label2"
runat="server">Label</asp:Label></P>
</form>
</body>
</HTML>
Public Class WebForm1
Inherits System.Web.UI.Page
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private
Sub InitializeComponent()
End Sub
Protected WithEvents Button1 As
System.Web.UI.WebControls.Button
Protected WithEvents Label1 As
System.Web.UI.WebControls.Label
Protected WithEvents Label2 As
System.Web.UI.WebControls.Label
'NOTE: The following placeholder declaration is
required by the Web Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As
System.Object
Private Sub Page_Init(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web
Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Public WithEvents WebUserControl1 As
WebApplication3.WebUserControl1
Private Sub Page_Load(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub Button1_Click(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
Button1.Click
'Dim cont As New WebUserControl1
Label1.Text = WebUserControl1.FirstName
Label2.Text = WebUserControl1.LastName
End Sub
End Class
Here is the code for the ascx.
<%@ Control Language="vb" AutoEventWireup="false"
Codebehind="WebUserControl1.ascx.vb"
Inherits="WebApplication3.WebUserControl1"
TargetSchema="http://schemas.microsoft.com/intellisense/ie
5" %>
<P>First Name:
<asp:TextBox id="TextBox1"
runat="server"></asp:TextBox></P>
<P>Last Name:
<asp:TextBox id="TextBox2"
runat="server"></asp:TextBox></P>
Public MustInherit Class WebUserControl1
Inherits System.Web.UI.UserControl
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private
Sub InitializeComponent()
End Sub
Protected WithEvents TextBox1 As
System.Web.UI.WebControls.TextBox
Protected WithEvents TextBox2 As
System.Web.UI.WebControls.TextBox
'NOTE: The following placeholder declaration is
required by the Web Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As
System.Object
Private Sub Page_Init(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web
Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Public ReadOnly Property FirstName() As String
Get
Return Me.TextBox1.Text
End Get
End Property
Public ReadOnly Property LastName() As String
Get
Return Me.TextBox2.Text
End Get
End Property
Private Sub Page_Load(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
End Sub
End Class
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