asked on

Controls = NOTHING on Page_Load, cannot set control properties

I have a web form in a project that has suddenly become a problem.
I removed a checkbox that was working on the form, and added two radio buttons instead.
In the form's Page_Load routine, I read a DataRow item's value - and check the appropriate radio button.
The problem is - I get "...NullReferenceException - Object not set to an instance of an object." on the line setting the Checked property.
If I break on that line, my radio button is indeed Nothing. I next put a new label on the page, and set it's text in the form's Page_Load routine - SAME PROBLEM - NullReferenceException - Object not set to an instance of an object."
In both cases, the region "Web Form Designer Generated Code" DOES contain the lines Protected WithEvents... declaring the new controls.

Any ideas what could this problem be caused by???? How can I resolve it???? Thanks in advance!

jnhorst

Are these controls within the <form runat="server"...></form> tag in the HTML view of the aspx page?

John

mmarinov

Hi kerickson0328,

can you post your code ?

Regards!
B..M

kerickson0328

ASKER

Yes they are.

kerickson0328

ASKER

Here's the HTML ------->

<%@ Page EnableSessionState="True" Language="vb" AutoEventWireup="false" Codebehind="employereditname.aspx.vb" Inherits="_4NCAlert.employereditname" errorPage="errpage.aspx" %>
<%@ Register TagPrefix="uc1" TagName="header" Src="../header.ascx" %>
<%@ Register TagPrefix="uc1" TagName="clientmenu" Src="../clientmenu.ascx" %>
<%@ Register TagPrefix="uc1" TagName="footer" Src="../footer.ascx" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
 <title>employereditname</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">
 <LINK media="screen" href="../bus037.css" rel="stylesheet">
 </HEAD>
 <body background="../images/bg.gif">
 <form id="Form1" method="post" runat="server">
 <CENTER>
 <table cellSpacing="1" cellPadding="0" width="770" bgColor="black" border="0">
 <tr>
 <td width="201" bgColor="#f1f9ff" valign="top">
 <table cellSpacing="0" cellPadding="0" width="201" border="0">
 <tr>
 <td width="201"><IMG alt="" src="../images/logo.jpg"></td>
 </tr>
 <tr>
 <td width="201">
 Employer Navigation Menu
 <UL>
 <LI>
 <A href="EmployerManageNames.aspx">Manage Names</A>
 <LI>
 <A href="EmployerMatches.aspx">View Match Activity</A>
 <LI>
 <A href="EmployerEditProfile.aspx">Edit Employer Profile</A>
 <LI>
 <A href="EmployerMain.aspx">Employer Home</A></LI></UL>
 Contact Information

 </td>
 </tr>
 </table>
 
 
 </td>
 <td vAlign="top" width="569" bgColor="#f1f9ff">
 <h1>4NCAlert Employer -
 <asp:Label id="lblEmployer" runat="server"></asp:Label></h1>
 <h2>
 Edit Employee Information</h2>
 Edit the employee's information below, then click submit to save your changes.
 
 <TABLE id="Table2" style="WIDTH: 455px; HEIGHT: 392px" cellSpacing="1" cellPadding="1"
 width="455" bgColor="#f1f9ff" border="0">
 <TR>
 <TD style="WIDTH: 125px; HEIGHT: 24px">Client ID:</TD>
 <TD style="HEIGHT: 24px">
 <asp:Label id="lblClientID" runat="server"></asp:Label></TD>
 </TR>
 <TR>
 <TD style="WIDTH: 125px; HEIGHT: 1px">Employer
 ID:</TD>
 <TD style="HEIGHT: 1px">
 <asp:Label id="lblEmployerID" runat="server" Font-Names="Arial" ForeColor="Navy" Font-Size="XX-Small"></asp:Label></TD>
 </TR>
 <TR>
 <TD style="WIDTH: 125px; HEIGHT: 18px">Employee
 ID:</TD>
 <TD style="HEIGHT: 18px">
 <asp:TextBox id="txtEmployeeID" runat="server" Width="154px"></asp:TextBox>
 <asp:requiredfieldvalidator id="RequiredFieldValidator2" runat="server" Font-Names="Arial" Font-Size="XX-Small"
 ErrorMessage="EmployeeID is Required." ControlToValidate="txtEmployeeID"></asp:requiredfieldvalidator></TD>
 </TR>
 <TR>
 <TD style="WIDTH: 125px; HEIGHT: 24px">First
 Name:</TD>
 <TD style="HEIGHT: 24px">
 <asp:TextBox id="txtFirstName" runat="server" Width="154px"></asp:TextBox>
 <asp:requiredfieldvalidator id="RequiredFieldValidator3" runat="server" Font-Names="Arial" Font-Size="XX-Small"
 ErrorMessage="First Name is Required." ControlToValidate="txtFirstName"></asp:requiredfieldvalidator></TD>
 </TR>
 <TR>
 <TD style="WIDTH: 125px; HEIGHT: 16px">Mid.
 Name/IN:</TD>
 <TD style="HEIGHT: 16px">
 <asp:TextBox id="txtMidName" runat="server"></asp:TextBox></TD>
 </TR>
 <TR>
 <TD style="WIDTH: 125px; HEIGHT: 14px">Last
 Name:</TD>
 <TD style="HEIGHT: 14px">
 <asp:TextBox id="txtLastName" runat="server" Width="153px"></asp:TextBox>
 <asp:requiredfieldvalidator id="Requiredfieldvalidator6" runat="server" Font-Names="Arial" Font-Size="XX-Small"
 ErrorMessage="Last Name is Required." ControlToValidate="txtLastName"></asp:requiredfieldvalidator></TD>
 </TR>
 <TR>
 <TD style="WIDTH: 125px; HEIGHT: 14px">Suffix:</TD>
 <TD style="HEIGHT: 14px">
 <asp:TextBox id="txtSuffix" runat="server" Width="153px"></asp:TextBox></TD>
 </TR>
 <TR>
 <TD style="WIDTH: 125px; HEIGHT: 20px">Date
 Of Birth:</TD>
 <TD style="HEIGHT: 20px">
 <asp:TextBox id="txtDOB" runat="server"></asp:TextBox>
 <asp:requiredfieldvalidator id="RequiredFieldValidator5" runat="server" Font-Names="Arial" Font-Size="XX-Small"
 ErrorMessage="Date Of Birth is Required." ControlToValidate="txtDOB" Height="8px"></asp:requiredfieldvalidator>
 <asp:regularexpressionvalidator id="RegularExpressionValidator1" runat="server" Font-Names="Arial" Font-Size="XX-Small"
 ErrorMessage="Use Format MM/DD/YYYY" ControlToValidate="txtDOB" ValidationExpression="^(|(0[1-9])|(1[0-2]))\/((0[1-9])|(1\d)|(2\d)|(3[0-1]))\/((\d{4}))$"></asp:regularexpressionvalidator></TD>
 </TR>
 <TR>
 <TD style="WIDTH: 125px; HEIGHT: 25px"></TD>
 <TD style="HEIGHT: 25px"> 
 <asp:Label id="lblActive" runat="server"></asp:Label>   
  
 <asp:CheckBox id="chkActive" runat="server"></asp:CheckBox></TD>
 </TR>
 <TR>
 <TD style="WIDTH: 125px; HEIGHT: 20px">
 
 <asp:Button id="btnSubmit" runat="server" ForeColor="White" BorderStyle="Ridge" BackColor="Gray"
 Text="Submit"></asp:Button>
 
 </TD>
 <TD style="HEIGHT: 20px">
 <asp:Label id="lblStatus" runat="server" Font-Names="Arial" Font-Bold="True" ForeColor="Red"></asp:Label></TD>
 </TR>
 <TR>
 <TD style="WIDTH: 105px" vAlign="top" colSpan="2">
  
 </TD>
 </TR>
 </TABLE>
 
  
 </td>
 </tr>
 <tr>
 <td width="720" bgColor="#f1f9ff" colSpan="2"><IMG alt="" src="../images/footer.gif"></td>
 </tr>
 <tr height="14">
 <td width="720" bgColor="#f1f9ff" colSpan="2" height="14">

 </td>
 </tr>
 </table>
 </CENTER>
  
 </form>
 </body>
</HTML>

kerickson0328

ASKER

Here's the code for Page_Load ----->

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

If Not IsPostBack Then

'Fill text boxes w/name info
oName = New AlertName
Dim row As DataRow = oName.GetAlertName(Session("CurrentControlID"))
lblClientID.Text = Session("ClientID")
lblEmployerID.Text = row("employerID")
lblEmployer.Text = oEmployer.GetEmployerName(Session("CurrentEmployerID"))
txtEmployeeID.Text = row("employeeID")
txtFirstName.Text = row("fname")
If Not IsDBNull(row("minitial")) Then
txtMidName.Text = row("minitial")
Else
txtMidName.Text = ""
End If
txtLastName.Text = row("lname")
If Not IsDBNull(row("suffix")) Then
txtSuffix.Text = row("suffix")
Else
txtSuffix.Text = ""
End If
If Not IsDBNull(row("dob")) Then
txtDOB.Text = row("dob")
Else
txtDOB.Text = ""
End If

If row("active") = 1 Then
lblActive.Text = "Employee Current Status - Active"
iAct = 1
ElseIf row("active") = 0 Then
lblActive.Text = "Employee Current Status - Inactive"
iAct = 0
End If

Else

End If

End Sub

kerickson0328

ASKER

lblActive is the control currently causing this error. The others (created prior to today) do not cause error.

Thanks for looking at this.

mmarinov

kerickson0328,

try to comment the lines that lblActive is used and try to rebuild
after that uncomment the lines and try to rebuild the solution

Regards!
B..M

ASKER CERTIFIED SOLUTION

Rejojohny

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kerickson0328

ASKER

ok, this I've never seen... mmarinov - I commented out the 2 lines in code that set lblActive Text property. When I run the project, the web form loads (no more error), BUT the form still has the OLD checkbox that I deleted earlier today. In VS.NET however, the designer shows the form as it SHOULD be - old checkbox gone, but with new label - lblActive & new checkbox.

Rejojohny - I added the control through the designer, but when I double-click the new checkbox, nothing happens. When I double-click the new label it goes to my now commented line in the code lblActive.text = ....

thanks to you both!

mmarinov

kerickson0328,

it sounds like a VS.NET gone crazy
if it is not a problem - restart the pc - and all have to be ok

Regards!
B..M

kerickson0328

ASKER

Wow - the things you miss sometimes!! I found the reason I've been having this problem, thanks to your suggestions.
I had recently moved this form to a new diretory in the site, and simply removed the previous copy from the site root directory.
I found that I was being redirected to the OLD copy in the root, b/c I missed adding the folder to the path in an html link. Once I deleted the old file and made sure I had updated all the links in the site to point to the forms in the new directory - of course - it works just fine!

kerickson0328

ASKER

correction above - I removed the old copy from the project in .NET, it still existed, so my bad links were still 'working'.

mmarinov

kerickson0328,

I see. Good luck

Regards!
B..M