label not declared?
How come? All other pages in this app are allowing me to set a labels text property by using lblName.Text = someVarname in the .vb file.
What am I missing here (only diff is this page in it's own folder but still off the apps root and within the VS2005 solution)
.aspx page
<form id="form1" runat="server">
<div>
<asp:Label ID="lblSession" runat="server" Text=""></asp:Label>
</div>
</form>
code behind
Partial Class Wapps_Default
Inherits System.Web.UI.Page
Dim instance As HttpSessionState
Dim value As String
lblSession.text = instance.value
End Class
error: declaration expected (lblSession)
What am I missing here (only diff is this page in it's own folder but still off the apps root and within the VS2005 solution)
.aspx page
<form id="form1" runat="server">
<div>
<asp:Label ID="lblSession" runat="server" Text=""></asp:Label>
</div>
</form>
code behind
Partial Class Wapps_Default
Inherits System.Web.UI.Page
Dim instance As HttpSessionState
Dim value As String
lblSession.text = instance.value
End Class
error: declaration expected (lblSession)
ASKER
Strange not needed to do that in the other pages... however
Partial Class Wapps_Default
Inherits System.Web.UI.Page
Protected WithEvents lblSession As Label
Dim instance As HttpSessionState
Dim value As String
lblSession.text = instance.value
End Class
gives the error: lblsession is already declared as protected dim withevents lblSession as system.web.ui.webcontrols.
Partial Class Wapps_Default
Inherits System.Web.UI.Page
Protected WithEvents lblSession As Label
Dim instance As HttpSessionState
Dim value As String
lblSession.text = instance.value
End Class
gives the error: lblsession is already declared as protected dim withevents lblSession as system.web.ui.webcontrols.
in vs 2005, you dont have to declare at both the places(aspx and the code behind..)...so i am guessing its not the error..
ASKER
the only declaration(s) are in the code behind.
This was just a test page the entire code for both pages is here:
default.aspx.vb
Partial Class Wapps_Default
Inherits System.Web.UI.Page
Protected WithEvents lblSession As Label
Dim instance As HttpSessionState
Dim value As String
lblSession.text = instance.value
End Class
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb"
default.aspx
<!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>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="lblSession" runat="server" Text=""></asp:Label>
</div>
</form>
</body>
</html>
This was just a test page the entire code for both pages is here:
default.aspx.vb
Partial Class Wapps_Default
Inherits System.Web.UI.Page
Protected WithEvents lblSession As Label
Dim instance As HttpSessionState
Dim value As String
lblSession.text = instance.value
End Class
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb"
default.aspx
<!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>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="lblSession" runat="server" Text=""></asp:Label>
</div>
</form>
</body>
</html>
ASKER CERTIFIED SOLUTION
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ASKER
ok I changed the code to this
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim instance As HttpSessionState
Dim SIDvalue As String = instance.SessionID
lblSession.Text = SIDvalue
End Sub
now it says that instance is used before being assigned a value and a null value could cause exception.
How can I get past this? When I try to run it I get the error "Object reference not set to an instance of an object."
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim instance As HttpSessionState
Dim SIDvalue As String = instance.SessionID
lblSession.Text = SIDvalue
End Sub
now it says that instance is used before being assigned a value and a null value could cause exception.
How can I get past this? When I try to run it I get the error "Object reference not set to an instance of an object."
i am not familiar with httpsession..
but generally you encounter this error when you fail to instantiate...you are missing a 'new' keyword somewhere..that would be my guess..
but generally you encounter this error when you fail to instantiate...you are missing a 'new' keyword somewhere..that would be my guess..
The line:
Dim SIDvalue As String = instance.SessionID
Should probably say:
Dim SIDvalue As String = Session.SessionID
As I assume you want to get the ID of the current Session. You currently declare an object of type HttpSessionState, but don't assign anything to it, but I guess you meant to use the existing Session object.
Dim SIDvalue As String = instance.SessionID
Should probably say:
Dim SIDvalue As String = Session.SessionID
As I assume you want to get the ID of the current Session. You currently declare an object of type HttpSessionState, but don't assign anything to it, but I guess you meant to use the existing Session object.
ASKER
I just want to get the current sessionID, this was a test page I plan to use the ID in an app I'm making.
I looked up VS2005 help on how to get it in asp.net 2.0 and got this example...
Dim instance As HttpSessionState
Dim value As String
value = instance.SessionID
If anyone knows a better/working way I'm all ears.
I looked up VS2005 help on how to get it in asp.net 2.0 and got this example...
Dim instance As HttpSessionState
Dim value As String
value = instance.SessionID
If anyone knows a better/working way I'm all ears.
As I mentioned in my last post:
Dim SIDvalue As String = Session.SessionID
Dim SIDvalue As String = Session.SessionID
ASKER
sorry missed that - works perfectly!
Erm, not that i'm really bothered but, how come all the points went to Pra4444 ?
ASKER
Sorry I felt a bit mean when I did it but.... my intial question was regarding the label not being declared.
His post said that it had to be declared within a page event which was what fixed my problem - the sessionID bit was a spin off and never part of the original question.
I do very appreciate you providing the correct answer for the second question.
I can set up a dummy question and award you the points for it if you like - does that break EE rules?
His post said that it had to be declared within a page event which was what fixed my problem - the sessionID bit was a spin off and never part of the original question.
I do very appreciate you providing the correct answer for the second question.
I can set up a dummy question and award you the points for it if you like - does that break EE rules?
Don't worry about it, like I said i'm not all that bothered; it's just that, ordinarily, if you add a spin-off question that gets answered then people usually split the points.
Protected WithEvents lblSession As Label