Handling refreshes from browser

[tshad]

I was looking for a way to handle refreshes (user pressed refresh button)
and found a piece of code to check if a Web page was refreshed but I can't
get it to work.

The code is:
*************** *************** *************** ***************
Namespace StevenBey.Web.U I

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState
End Class 'Page

End NameSpace
*************** *************** *************** ***************

If I do a:

trace.warn("is Refresh = " & Page.IsRefresh)

or

trace.warn("is Refresh = " & IsRefresh)

I get the error:

BC30456 'IsRefresh' is not a member of 'System.Web.UI. Page'

I took the compiled version (StevenBey.Web. UI.dll) and put it in my Bin
directory.

If you look at trace page you won't see __ISREFRESH?

Is there something else I need to do to get this to work?

Thanks,

Tom

[tommaso.gastaldi]

Hi Tom,

see the remarks here made by a User:

http://jarednevans.typepad.com/techn..._techno_b.html

this method seems to fail when back button is pressed. You can download
a demo.

Tommaso

tshad ha scritto:

I was looking for a way to handle refreshes (user pressed refresh button)
and found a piece of code to check if a Web page was refreshed but I can't
get it to work.

The code is:
*************** *************** *************** ***************
Namespace StevenBey.Web.U I

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState
End Class 'Page

End NameSpace
*************** *************** *************** ***************

If I do a:

trace.warn("is Refresh = " & Page.IsRefresh)

or

trace.warn("is Refresh = " & IsRefresh)

I get the error:

BC30456 'IsRefresh' is not a member of 'System.Web.UI. Page'

I took the compiled version (StevenBey.Web. UI.dll) and put it in my Bin
directory.

If you look at trace page you won't see __ISREFRESH?

Is there something else I need to do to get this to work?

Thanks,

Tom

[tshad]

I was able to get it to work after closer reading of the article.

*************** *************** *************** *************** *******
Namespace MyFunctions

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState

End Class 'Page

End NameSpace
*************** *************** *************** **

In my page, I have to add an inherits:

<%@ Page Language="VB" trace="true" ContentType="te xt/html"
ResponseEncodin g="iso-8859-1" Inherits="MyFun ctions.Page"%>
....
trace.warn("is Refresh = " & IsRefresh())

Then it works.

I am confused as to the code with the "allStates" and how it works.

In LoadViewState:
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))

It seems to be getting the savedState from the parameters list, then I think
it does the normal LoadViewState passing allStates(0) (which is really just
savedState - so why not just pass savedState??).

Also, what is allStates(1)?

In SaveViewState:
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates

I assume the MyBase.SaveView State() is just doing the normal SaveViewState
and passes back the changed ViewState into allStates(0), what is
allStates(1) and why are we passing back allStates - does this overwrite the
ViewState that was written out by MyBase.SaveView State()?

Thanks,

Tom

<to************ **@uniroma1.itw rote in message
news:11******** *************@m 73g2000cwd.goog legroups.com...

Hi Tom,

see the remarks here made by a User:

http://jarednevans.typepad.com/techn..._techno_b.html

this method seems to fail when back button is pressed. You can download
a demo.

Tommaso

tshad ha scritto:

>I was looking for a way to handle refreshes (user pressed refresh button)
and found a piece of code to check if a Web page was refreshed but I
can't
get it to work.

The code is:
************** *************** *************** *************** *
Namespace StevenBey.Web.U I

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState
End Class 'Page

End NameSpace
************** *************** *************** *************** *

If I do a:

trace.warn("is Refresh = " & Page.IsRefresh)

or

trace.warn("is Refresh = " & IsRefresh)

I get the error:

BC30456 'IsRefresh' is not a member of 'System.Web.UI. Page'

I took the compiled version (StevenBey.Web. UI.dll) and put it in my Bin
directory.

If you look at trace page you won't see __ISREFRESH?

Is there something else I need to do to get this to work?

Thanks,

Tom

[tommaso.gastaldi]

But what about the back button problem.
I think that user was right. It doesn't work in that case.

The (almost) funny thing is that a guy has copied this article and
published it on Code Project site.
He also copied the bugs clearly ... :)

Tommaso

tshad ha scritto:

I was able to get it to work after closer reading of the article.

*************** *************** *************** *************** *******
Namespace MyFunctions

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState

End Class 'Page

End NameSpace
*************** *************** *************** **

In my page, I have to add an inherits:

<%@ Page Language="VB" trace="true" ContentType="te xt/html"
ResponseEncodin g="iso-8859-1" Inherits="MyFun ctions.Page"%>
...
trace.warn("is Refresh = " & IsRefresh())

Then it works.

I am confused as to the code with the "allStates" and how it works.

In LoadViewState:
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))

It seems to be getting the savedState from the parameters list, then I think
it does the normal LoadViewState passing allStates(0) (which is really just
savedState - so why not just pass savedState??).

Also, what is allStates(1)?

In SaveViewState:
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates

I assume the MyBase.SaveView State() is just doing the normal SaveViewState
and passes back the changed ViewState into allStates(0), what is
allStates(1) and why are we passing back allStates - does this overwrite the
ViewState that was written out by MyBase.SaveView State()?

Thanks,

Tom

<to************ **@uniroma1.itw rote in message
news:11******** *************@m 73g2000cwd.goog legroups.com...

Hi Tom,

see the remarks here made by a User:

http://jarednevans.typepad.com/techn..._techno_b.html

this method seems to fail when back button is pressed. You can download
a demo.

Tommaso

tshad ha scritto:

I was looking for a way to handle refreshes (user pressed refresh button)
and found a piece of code to check if a Web page was refreshed but I
can't
get it to work.

The code is:
*************** *************** *************** ***************
Namespace StevenBey.Web.U I

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState
End Class 'Page

End NameSpace
*************** *************** *************** ***************

If I do a:

trace.warn("is Refresh = " & Page.IsRefresh)

or

trace.warn("is Refresh = " & IsRefresh)

I get the error:

BC30456 'IsRefresh' is not a member of 'System.Web.UI. Page'

I took the compiled version (StevenBey.Web. UI.dll) and put it in my Bin
directory.

If you look at trace page you won't see __ISREFRESH?

Is there something else I need to do to get this to work?

Thanks,

Tom

[tshad]

<to************ **@uniroma1.itw rote in message
news:11******** **************@ b28g2000cwb.goo glegroups.com.. .

But what about the back button problem.
I think that user was right. It doesn't work in that case.

I know that that is also a problem and I am going to address that problem in
a bit. But I needed to get the refresh problem taken care of right away.

>
The (almost) funny thing is that a guy has copied this article and
published it on Code Project site.
He also copied the bugs clearly ... :)

I agree.

But that allows someone else to at least get a starting point to work from.

Tom

>
Tommaso

tshad ha scritto:

>I was able to get it to work after closer reading of the article.

************** *************** *************** *************** ********
Namespace MyFunctions

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState

End Class 'Page

End NameSpace
************** *************** *************** ***

In my page, I have to add an inherits:

<%@ Page Language="VB" trace="true" ContentType="te xt/html"
ResponseEncodi ng="iso-8859-1" Inherits="MyFun ctions.Page"%>
...
trace.warn(" is Refresh = " & IsRefresh())

Then it works.

I am confused as to the code with the "allStates" and how it works.

In LoadViewState:
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))

It seems to be getting the savedState from the parameters list, then I
think
it does the normal LoadViewState passing allStates(0) (which is really
just
savedState - so why not just pass savedState??).

Also, what is allStates(1)?

In SaveViewState:
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates

I assume the MyBase.SaveView State() is just doing the normal
SaveViewStat e
and passes back the changed ViewState into allStates(0), what is
allStates(1) and why are we passing back allStates - does this overwrite
the
ViewState that was written out by MyBase.SaveView State()?

Thanks,

Tom

<to*********** ***@uniroma1.it wrote in message
news:11******* **************@ m73g2000cwd.goo glegroups.com.. .

Hi Tom,

see the remarks here made by a User:

http://jarednevans.typepad.com/techn..._techno_b.html

this method seems to fail when back button is pressed. You can download
a demo.

Tommaso

tshad ha scritto:

I was looking for a way to handle refreshes (user pressed refresh
button)
and found a piece of code to check if a Web page was refreshed but I
can't
get it to work.

The code is:
************** *************** *************** *************** *
Namespace StevenBey.Web.U I

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState
End Class 'Page

End NameSpace
************** *************** *************** *************** *

If I do a:

trace.warn("is Refresh = " & Page.IsRefresh)

or

trace.warn("is Refresh = " & IsRefresh)

I get the error:

BC30456 'IsRefresh' is not a member of 'System.Web.UI. Page'

I took the compiled version (StevenBey.Web. UI.dll) and put it in my
Bin
directory.

If you look at trace page you won't see __ISREFRESH?

Is there something else I need to do to get this to work?

Thanks,

Tom

[tshad]

"tshad" <ts**********@f tsolutions.comw rote in message
news:%2******** **********@TK2M SFTNGP05.phx.gb l...

<to************ **@uniroma1.itw rote in message
news:11******** **************@ b28g2000cwb.goo glegroups.com.. .

>But what about the back button problem.
I think that user was right. It doesn't work in that case.

Actually, I did some work with the program and found that it also doesn't
work on the inital page. It only works for PostBacks.

Looking into it I found that since LoadViewState is not called on an initial
page load (makes sense as there would be no ViewState saved here), there is
nothing to test.

I need to find some other way to make it work or find a way to find out if
the initial page.

Tom

I know that that is also a problem and I am going to address that problem
in a bit. But I needed to get the refresh problem taken care of right
away.

>>
The (almost) funny thing is that a guy has copied this article and
published it on Code Project site.
He also copied the bugs clearly ... :)

I agree.

But that allows someone else to at least get a starting point to work
from.

Tom

>>
Tommaso

tshad ha scritto:

>>I was able to get it to work after closer reading of the article.

************* *************** *************** *************** *********
Namespace MyFunctions

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState

End Class 'Page

End NameSpace
************* *************** *************** ****

In my page, I have to add an inherits:

<%@ Page Language="VB" trace="true" ContentType="te xt/html"
ResponseEncod ing="iso-8859-1" Inherits="MyFun ctions.Page"%>
...
trace.warn("i s Refresh = " & IsRefresh())

Then it works.

I am confused as to the code with the "allStates" and how it works.

In LoadViewState:
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))

It seems to be getting the savedState from the parameters list, then I
think
it does the normal LoadViewState passing allStates(0) (which is really
just
savedState - so why not just pass savedState??).

Also, what is allStates(1)?

In SaveViewState:
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates

I assume the MyBase.SaveView State() is just doing the normal
SaveViewSta te
and passes back the changed ViewState into allStates(0), what is
allStates(1 ) and why are we passing back allStates - does this overwrite
the
ViewState that was written out by MyBase.SaveView State()?

Thanks,

Tom

<to********** ****@uniroma1.i twrote in message
news:11****** *************** @m73g2000cwd.go oglegroups.com. ..
Hi Tom,

see the remarks here made by a User:

http://jarednevans.typepad.com/techn..._techno_b.html

this method seems to fail when back button is pressed. You can
download
a demo.

Tommaso

tshad ha scritto:

I was looking for a way to handle refreshes (user pressed refresh
button)
and found a piece of code to check if a Web page was refreshed but I
can't
get it to work.

The code is:
************* *************** *************** *************** **
Namespace StevenBey.Web.U I

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState
End Class 'Page

End NameSpace
************* *************** *************** *************** **

If I do a:

trace.warn("is Refresh = " & Page.IsRefresh)

or

trace.warn("is Refresh = " & IsRefresh)

I get the error:

BC30456 'IsRefresh' is not a member of 'System.Web.UI. Page'

I took the compiled version (StevenBey.Web. UI.dll) and put it in my
Bin
directory.

If you look at trace page you won't see __ISREFRESH?

Is there something else I need to do to get this to work?

Thanks,

Tom

[tommaso.gastaldi]

Hi Tom,

I am afraid that is not exactly an "elementary " topic. Here is a more
authoritative source:

http://msdn.microsoft.com/msdnmag/is...8/CuttingEdge/

Let us know about the best solution... :)

Tommaso

tshad ha scritto:

"tshad" <ts**********@f tsolutions.comw rote in message
news:%2******** **********@TK2M SFTNGP05.phx.gb l...

<to************ **@uniroma1.itw rote in message
news:11******** **************@ b28g2000cwb.goo glegroups.com.. .

But what about the back button problem.
I think that user was right. It doesn't work in that case.

Actually, I did some work with the program and found that it also doesn't
work on the inital page. It only works for PostBacks.

Looking into it I found that since LoadViewState is not called on an initial
page load (makes sense as there would be no ViewState saved here), there is
nothing to test.

I need to find some other way to make it work or find a way to find out if
the initial page.

Tom

I know that that is also a problem and I am going to address that problem
in a bit. But I needed to get the refresh problem taken care of right
away.

>
The (almost) funny thing is that a guy has copied this article and
published it on Code Project site.
He also copied the bugs clearly ... :)

I agree.

But that allows someone else to at least get a starting point to work
from.

Tom

>
Tommaso

tshad ha scritto:

I was able to get it to work after closer reading of the article.

************** *************** *************** *************** ********
Namespace MyFunctions

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState

End Class 'Page

End NameSpace
************** *************** *************** ***

In my page, I have to add an inherits:

<%@ Page Language="VB" trace="true" ContentType="te xt/html"
ResponseEncodi ng="iso-8859-1" Inherits="MyFun ctions.Page"%>
...
trace.warn(" is Refresh = " & IsRefresh())

Then it works.

I am confused as to the code with the "allStates" and how it works.

In LoadViewState:
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))

It seems to be getting the savedState from the parameters list, then I
think
it does the normal LoadViewState passing allStates(0) (which is really
just
savedState - so why not just pass savedState??).

Also, what is allStates(1)?

In SaveViewState:
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates

I assume the MyBase.SaveView State() is just doing the normal
SaveViewStat e
and passes back the changed ViewState into allStates(0), what is
allStates(1) and why are we passing back allStates - does this overwrite
the
ViewState that was written out by MyBase.SaveView State()?

Thanks,

Tom

<to*********** ***@uniroma1.it wrote in message
news:11******* **************@ m73g2000cwd.goo glegroups.com.. .
Hi Tom,

see the remarks here made by a User:

http://jarednevans.typepad.com/techn..._techno_b.html

this method seems to fail when back button is pressed. You can
download
a demo.

Tommaso

tshad ha scritto:

I was looking for a way to handle refreshes (user pressed refresh
button)
and found a piece of code to check if a Web page was refreshed but I
can't
get it to work.

The code is:
************** *************** *************** *************** *
Namespace StevenBey.Web.U I

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState
End Class 'Page

End NameSpace
************** *************** *************** *************** *

If I do a:

trace.warn("is Refresh = " & Page.IsRefresh)

or

trace.warn("is Refresh = " & IsRefresh)

I get the error:

BC30456 'IsRefresh' is not a member of 'System.Web.UI. Page'

I took the compiled version (StevenBey.Web. UI.dll) and put it in my
Bin
directory.

If you look at trace page you won't see __ISREFRESH?

Is there something else I need to do to get this to work?

Thanks,

Tom

[tshad]

<to************ **@uniroma1.itw rote in message
news:11******** **************@ i3g2000cwc.goog legroups.com...

Hi Tom,

I am afraid that is not exactly an "elementary " topic. Here is a more
authoritative source:

http://msdn.microsoft.com/msdnmag/is...8/CuttingEdge/

I looked there, but the article is about Script Callbacks.

That was interesting also, as I was looking at doing this (like Ajax) but in
..net.

I knew you could do this in .net 1.1, but if what this is saying is correct
then I can't do it.

"ASP.NET 2.0 provides a built-in mechanism for client callbacks based on the
services of a COM object that ships with Internet Explorer 5.0 and later. By
using the same object, you can implement a script callback mechanism in
ASP.NET 1.x as well"

I don't want to do it if you have to depend on the user using IE.

Thanks,

Tom

>
Let us know about the best solution... :)

Tommaso

tshad ha scritto:

>"tshad" <ts**********@f tsolutions.comw rote in message
news:%2******* ***********@TK2 MSFTNGP05.phx.g bl...

<to************ **@uniroma1.itw rote in message
news:11******** **************@ b28g2000cwb.goo glegroups.com.. .
But what about the back button problem.
I think that user was right. It doesn't work in that case.

Actually, I did some work with the program and found that it also doesn't
work on the inital page. It only works for PostBacks.

Looking into it I found that since LoadViewState is not called on an
initial
page load (makes sense as there would be no ViewState saved here), there
is
nothing to test.

I need to find some other way to make it work or find a way to find out
if
the initial page.

Tom

I know that that is also a problem and I am going to address that
problem
in a bit. But I needed to get the refresh problem taken care of right
away.
The (almost) funny thing is that a guy has copied this article and
published it on Code Project site.
He also copied the bugs clearly ... :)

I agree.

But that allows someone else to at least get a starting point to work
from.

Tom
Tommaso

tshad ha scritto:

I was able to get it to work after closer reading of the article.

************* *************** *************** *************** *********
Namespace MyFunctions

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState

End Class 'Page

End NameSpace
************* *************** *************** ****

In my page, I have to add an inherits:

<%@ Page Language="VB" trace="true" ContentType="te xt/html"
ResponseEncod ing="iso-8859-1" Inherits="MyFun ctions.Page"%>
...
trace.warn("i s Refresh = " & IsRefresh())

Then it works.

I am confused as to the code with the "allStates" and how it works.

In LoadViewState:
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))

It seems to be getting the savedState from the parameters list, then
I
think
it does the normal LoadViewState passing allStates(0) (which is
really
just
savedState - so why not just pass savedState??).

Also, what is allStates(1)?

In SaveViewState:
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates

I assume the MyBase.SaveView State() is just doing the normal
SaveViewSta te
and passes back the changed ViewState into allStates(0), what is
allStates(1 ) and why are we passing back allStates - does this
overwrite
the
ViewState that was written out by MyBase.SaveView State()?

Thanks,

Tom

<to********** ****@uniroma1.i twrote in message
news:11****** *************** @m73g2000cwd.go oglegroups.com. ..
Hi Tom,

see the remarks here made by a User:

http://jarednevans.typepad.com/techn..._techno_b.html

this method seems to fail when back button is pressed. You can
download
a demo.

Tommaso

tshad ha scritto:

I was looking for a way to handle refreshes (user pressed refresh
button)
and found a piece of code to check if a Web page was refreshed but
I
can't
get it to work.

The code is:
************* *************** *************** *************** **
Namespace StevenBey.Web.U I

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState
End Class 'Page

End NameSpace
************* *************** *************** *************** **

If I do a:

trace.warn("is Refresh = " & Page.IsRefresh)

or

trace.warn("is Refresh = " & IsRefresh)

I get the error:

BC30456 'IsRefresh' is not a member of
'System.Web.U I.Page'

I took the compiled version (StevenBey.Web. UI.dll) and put it in
my
Bin
directory.

If you look at trace page you won't see __ISREFRESH?

Is there something else I need to do to get this to work?

Thanks,

Tom

[tommaso.gastaldi]

Hi Tom,

I posted the wrong link. Here it is:

http://msdn.microsoft.com/library/de...rockaspnet.asp

"Trap the Browser Refresh
In an article originally published on aspnetPRO Magazine several months
ago, I outlined the steps needed to detect when the user presses the F5
browser button to refresh the current page. The page refresh is the
browser's response to a specific user action-hitting the F5 key or
clicking the toolbar button. The page refresh action is a sort of
internal browser operation, for which the browser doesn't provide any
external notification

see also:
http://www.joel.net/code/refresh_capture.aspx

Let me know if you find a definitive solution...

Tommaso

tshad ha scritto:

<to************ **@uniroma1.itw rote in message
news:11******** **************@ i3g2000cwc.goog legroups.com...

Hi Tom,

I am afraid that is not exactly an "elementary " topic. Here is a more
authoritative source:

http://msdn.microsoft.com/msdnmag/is...8/CuttingEdge/

I looked there, but the article is about Script Callbacks.

That was interesting also, as I was looking at doing this (like Ajax) but in
.net.

I knew you could do this in .net 1.1, but if what this is saying is correct
then I can't do it.

"ASP.NET 2.0 provides a built-in mechanism for client callbacks based on the
services of a COM object that ships with Internet Explorer 5.0 and later. By
using the same object, you can implement a script callback mechanism in
ASP.NET 1.x as well"

I don't want to do it if you have to depend on the user using IE.

Thanks,

Tom

Let us know about the best solution... :)

Tommaso

tshad ha scritto:

"tshad" <ts**********@f tsolutions.comw rote in message
news:%2******** **********@TK2M SFTNGP05.phx.gb l...
<to************ **@uniroma1.itw rote in message
news:11******** **************@ b28g2000cwb.goo glegroups.com.. .
But what about the back button problem.
I think that user was right. It doesn't work in that case.


Actually, I did some work with the program and found that it also doesn't
work on the inital page. It only works for PostBacks.

Looking into it I found that since LoadViewState is not called on an
initial
page load (makes sense as there would be no ViewState saved here), there
is
nothing to test.

I need to find some other way to make it work or find a way to find out
if
the initial page.

Tom

I know that that is also a problem and I am going to address that
problem
in a bit. But I needed to get the refresh problem taken care of right
away.


The (almost) funny thing is that a guy has copied this article and
published it on Code Project site.
He also copied the bugs clearly ... :)

I agree.

But that allows someone else to at least get a starting point to work
from.

Tom


Tommaso

tshad ha scritto:

I was able to get it to work after closer reading of the article.

************** *************** *************** *************** ********
Namespace MyFunctions

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState

End Class 'Page

End NameSpace
************** *************** *************** ***

In my page, I have to add an inherits:

<%@ Page Language="VB" trace="true" ContentType="te xt/html"
ResponseEncodi ng="iso-8859-1" Inherits="MyFun ctions.Page"%>
...
trace.warn(" is Refresh = " & IsRefresh())

Then it works.

I am confused as to the code with the "allStates" and how it works.

In LoadViewState:
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))

It seems to be getting the savedState from the parameters list, then
I
think
it does the normal LoadViewState passing allStates(0) (which is
really
just
savedState - so why not just pass savedState??).

Also, what is allStates(1)?

In SaveViewState:
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates

I assume the MyBase.SaveView State() is just doing the normal
SaveViewStat e
and passes back the changed ViewState into allStates(0), what is
allStates(1) and why are we passing back allStates - does this
overwrite
the
ViewState that was written out by MyBase.SaveView State()?

Thanks,

Tom

<to*********** ***@uniroma1.it wrote in message
news:11******* **************@ m73g2000cwd.goo glegroups.com.. .
Hi Tom,

see the remarks here made by a User:

http://jarednevans.typepad.com/techn..._techno_b.html

this method seems to fail when back button is pressed. You can
download
a demo.

Tommaso

tshad ha scritto:

I was looking for a way to handle refreshes (user pressed refresh
button)
and found a piece of code to check if a Web page was refreshed but
I
can't
get it to work.

The code is:
************** *************** *************** *************** *
Namespace StevenBey.Web.U I

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState
End Class 'Page

End NameSpace
************** *************** *************** *************** *

If I do a:

trace.warn("is Refresh = " & Page.IsRefresh)

or

trace.warn("is Refresh = " & IsRefresh)

I get the error:

BC30456 'IsRefresh' is not a member of
'System.Web.UI .Page'

I took the compiled version (StevenBey.Web. UI.dll) and put it in
my
Bin
directory.

If you look at trace page you won't see __ISREFRESH?

Is there something else I need to do to get this to work?

Thanks,

Tom

[tshad]

<to************ **@uniroma1.itw rote in message
news:11******** **************@ h48g2000cwc.goo glegroups.com.. .

Hi Tom,

I posted the wrong link. Here it is:

http://msdn.microsoft.com/library/de...rockaspnet.asp

I'll take a look at that to see what it says.

"Trap the Browser Refresh
In an article originally published on aspnetPRO Magazine several months
ago, I outlined the steps needed to detect when the user presses the F5
browser button to refresh the current page. The page refresh is the
browser's response to a specific user action-hitting the F5 key or
clicking the toolbar button. The page refresh action is a sort of
internal browser operation, for which the browser doesn't provide any
external notification

see also:
http://www.joel.net/code/refresh_capture.aspx

Already looking at this one.

I am looking at using ideas from his code to solve the problem from my
program dealing with the LoadViewState on the initial load problem.

I did find another problem that I didn't notice before with my code. I
didn't notice that my SaveViewState is being executed twice and I don't know
why. I put a trace statement in the function and found that it is being
called before the normal SaveViewState and during the SaveViewState.

aspx.page Begin Init
aspx.page End Init 0.000079 0.000079
aspx.page Begin PreRender 0.000116 0.000037
aspx.page End PreRender 0.000165 0.000049
Inside refresh.cs at SaveViewState 0.000880 0.000715
aspx.page Begin SaveViewState 0.001932 0.001053
Inside refresh.cs at SaveViewState 0.002330 0.000398
aspx.page End SaveViewState 0.002384 0.000054
aspx.page Begin Render 0.002411 0.000027
aspx.page End Render 0.137321 0.134909
Why would this happen?

Thanks,

Tom

>
Let me know if you find a definitive solution...

Tommaso

tshad ha scritto:

><to*********** ***@uniroma1.it wrote in message
news:11******* *************** @i3g2000cwc.goo glegroups.com.. .

Hi Tom,

I am afraid that is not exactly an "elementary " topic. Here is a more
authoritative source:

http://msdn.microsoft.com/msdnmag/is...8/CuttingEdge/

I looked there, but the article is about Script Callbacks.

That was interesting also, as I was looking at doing this (like Ajax) but
in
.net.

I knew you could do this in .net 1.1, but if what this is saying is
correct
then I can't do it.

"ASP.NET 2.0 provides a built-in mechanism for client callbacks based on
the
services of a COM object that ships with Internet Explorer 5.0 and later.
By
using the same object, you can implement a script callback mechanism in
ASP.NET 1.x as well"

I don't want to do it if you have to depend on the user using IE.

Thanks,

Tom

>
Let us know about the best solution... :)

Tommaso

tshad ha scritto:

"tshad" <ts**********@f tsolutions.comw rote in message
news:%2******* ***********@TK2 MSFTNGP05.phx.g bl...
<to************ **@uniroma1.itw rote in message
news:11******** **************@ b28g2000cwb.goo glegroups.com.. .
But what about the back button problem.
I think that user was right. It doesn't work in that case.
Actually, I did some work with the program and found that it also
doesn't
work on the inital page. It only works for PostBacks.

Looking into it I found that since LoadViewState is not called on an
initial
page load (makes sense as there would be no ViewState saved here),
there
is
nothing to test.

I need to find some other way to make it work or find a way to find
out
if
the initial page.

Tom

I know that that is also a problem and I am going to address that
problem
in a bit. But I needed to get the refresh problem taken care of
right
away.
The (almost) funny thing is that a guy has copied this article and
published it on Code Project site.
He also copied the bugs clearly ... :)

I agree.

But that allows someone else to at least get a starting point to
work
from.

Tom
Tommaso

tshad ha scritto:

I was able to get it to work after closer reading of the article.

************* *************** *************** *************** *********
Namespace MyFunctions

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState

End Class 'Page

End NameSpace
************* *************** *************** ****

In my page, I have to add an inherits:

<%@ Page Language="VB" trace="true" ContentType="te xt/html"
ResponseEncod ing="iso-8859-1" Inherits="MyFun ctions.Page"%>
...
trace.warn("i s Refresh = " & IsRefresh())

Then it works.

I am confused as to the code with the "allStates" and how it
works.

In LoadViewState:
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))

It seems to be getting the savedState from the parameters list,
then
I
think
it does the normal LoadViewState passing allStates(0) (which is
really
just
savedState - so why not just pass savedState??).

Also, what is allStates(1)?

In SaveViewState:
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates

I assume the MyBase.SaveView State() is just doing the normal
SaveViewSta te
and passes back the changed ViewState into allStates(0), what is
allStates(1 ) and why are we passing back allStates - does this
overwrite
the
ViewState that was written out by MyBase.SaveView State()?

Thanks,

Tom

<to********** ****@uniroma1.i twrote in message
news:11****** *************** @m73g2000cwd.go oglegroups.com. ..
Hi Tom,

see the remarks here made by a User:

http://jarednevans.typepad.com/techn..._techno_b.html

this method seems to fail when back button is pressed. You can
download
a demo.

Tommaso

tshad ha scritto:

I was looking for a way to handle refreshes (user pressed
refresh
button)
and found a piece of code to check if a Web page was refreshed
but
I
can't
get it to work.

The code is:
************* *************** *************** *************** **
Namespace StevenBey.Web.U I

Public Class Page
Inherits System.Web.UI.P age
Private _refreshState As Boolean
Private _isRefresh As Boolean
Public ReadOnly Property IsRefresh() As Boolean
Get
Return _isRefresh
End Get
End Property
Protected Overrides Sub LoadViewState(s avedState As Object)
Dim allStates As Object() = CType(savedStat e, Object())
MyBase.LoadView State(allStates (0))
_refreshState = CBool(allStates (1))
_isRefresh = _refreshState = CBool(Session(" __ISREFRESH"))
End Sub 'LoadViewState
Protected Overrides Function SaveViewState() As Object
Session("__ISRE FRESH") = _refreshState
Dim allStates(2) As Object
allStates(0) = MyBase.SaveView State()
allStates(1) = Not _refreshState
Return allStates
End Function 'SaveViewState
End Class 'Page

End NameSpace
************* *************** *************** *************** **

If I do a:

trace.warn("is Refresh = " & Page.IsRefresh)

or

trace.warn("is Refresh = " & IsRefresh)

I get the error:

BC30456 'IsRefresh' is not a member of
'System.Web.U I.Page'

I took the compiled version (StevenBey.Web. UI.dll) and put it
in
my
Bin
directory.

If you look at trace page you won't see __ISREFRESH?

Is there something else I need to do to get this to work?

Thanks,

Tom