InProc vs StateServer

T

tshad

I switched my site from InProc to StateServer a while ago which solve a
problem I was having dropping my session cookies when the worker process
recycles.

This has been working well until today.

I was looking at some sample code and found that it won't work under
StateServer, but will under InProc.

The message I get is:

Unable to serialize the session state. Please note that non-serializable
objects or MarshalByRef objects are not permitted when session state mode is
'StateServer' or 'SQLServer'.

What are the objects I can't use and why not?

The code I was looking at was :
********************************************************************************
<%@ Page Language="VB" Debug="False" Explicit="True" Buffer="True"%>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<html><head><title>Drilldown Datagrid Searching Within
Results</title></head>
<script runat="server" language="VB">
Sub Page_Load(Source As Object, E As EventArgs)
Response.BufferOutput = "True"
If Len(Request("search")) > 0 Or Len(Request("sub")) > 0 Then
If Len(Request("search")) > 0 Then Session.Clear()
MyDataGrid.CurrentPageIndex = 0 ' resets the Datagrid to page 1
BindGrid()
subsrch.visible = "true"
Else
subsrch.visible = "false"
End If
End Sub

Sub BindGrid()
Dim Source As DataView

If Len(Request("search")) = 0 Then Source = CType(Session("CachedGrid"),
DataView)
If IsNothing(Source) Then
Dim MyConnection As SqlConnection
Dim MyCommand As SqlDataAdapter
Dim RcdCount As integer
Dim DS As DataSet

Dim sqlQuery As String = "SELECT emp_id, fname, lname FROM employee where
(fname like '%" & Request("search") & "%' or lname like '%" &
Request("search") & "%') Order by emp_id asc"

Dim strConn As String = "server=(local);uid=sa;pwd=;database=pubs;"
MyConnection = New SqlConnection(strConn)
MyCommand = New SqlDataAdapter(sqlQuery, MyConnection)
DS = new DataSet()
MyCommand.Fill(DS, "MyDataGrid")
MyDataGrid.CurrentPageIndex = 0
Source = DS.Tables(0).DefaultView
' Insert Dataset into Session
Session("CachedGrid") = Source
End If
If Len(Request.Form("sub")) > 0 Then
Session ("Sub") &= " and (fname LIKE '%" & Request.Form("sub") & "%' or
lname LIKE '%" & Request.Form("sub") & "%') "
Source.RowFilter = Session ("Sub").SubString(5)
End If
If (Source.Count.ToString) >= 1 Then
MyDataGrid.visible = "true"
Else
msg.text = "<br><b>No records found</b>"
subsrch.visible = "false"
MyDataGrid.visible = "false"
End If
Try
'Get count from Dataview row count, same as Datagrid row
count
count.text = "<b>" & Source.Count.ToString & "
</b>results found<br>"
MyDataGrid.DataSource = Source
MyDataGrid.DataBind()
Catch e As Exception
MyDataGrid.CurrentPageIndex = 0 'reset the Datagrid back
to page 1 on any errors
End Try
End Sub

Sub MyDataGrid_Page(sender As Object, e As
DataGridPageChangedEventArgs)
MyDataGrid.CurrentPageIndex = e.NewPageIndex
BindGrid()
End Sub
</script>
<body bgcolor="#FFFFFF" topmargin="0" marginheight="0"
onLoad="document.forms[0].search.focus();">
<center>
<h3>Datagrid Drilldown Search Example</h3>
<form method="post">
<input type="text" name="search">
<input type="submit" Value="Go">
</form>
<form runat="server">
<span id="subsrch" runat="server">
Search Within results
<input type="text" name="sub">
<input type="submit" Value="Go">
</span>
<br><asp:label id="msg" runat="server" />
<br><asp:label id="count" runat="server" />
<ASP:DataGrid id="MyDataGrid" runat="server"
AllowPaging="True" PageSize="10" PagerStyle-Mode="NumericPages"
PagerStyle-HorizontalAlign="Right"
PagerStyle-NextPageText="Next" PagerStyle-PrevPageText="Prev"
OnPageIndexChanged="MyDataGrid_Page"
BorderColor="black" BorderWidth="1" GridLines="Both" CellPadding="3"
CellSpacing="0" Font-Name="Verdana"
Font-Size="8pt" HeaderStyle-BackColor="#FF8040"
AlternatingItemStyle-BackColor="#eeeeee" />
</form>
</center>
</body>
</html>
************************************************************************************

There are some asp.net objects as well as some "input" html. These normally
work.

What is the serialization that they are talking about that I can't use?

Thanks,

Tom
 
W

WJ

Unable to serialize the session state. Please note that non-serializable
objects or MarshalByRef objects are not permitted when session state mode
is 'StateServer' or 'SQLServer'.
Click to expand...

To store session state to stateServer and or Sql Server (ASPState), your
class must be marked as [Serializable]. Otherwise, only InProc can handle
stuffs like dataGrid. See example below:

namespace nSession
{
[Serializable()]
public class cSession
{
public string YourName;
public DateTime YourDOB;

public cSession()
{
}
}
}
*********************
There is a good article about SS, click here:
http://www.eggheadcafe.com/articles/20021016.asp

John
 
R

Robert Smith

The message I get is:

Unable to serialize the session state. Please note that non-serializable
objects or MarshalByRef objects are not permitted when session state mode is
'StateServer' or 'SQLServer'.




tshad said:
I switched my site from InProc to StateServer a while ago which solve a
problem I was having dropping my session cookies when the worker process
recycles.

This has been working well until today.

I was looking at some sample code and found that it won't work under
StateServer, but will under InProc.

The message I get is:

Unable to serialize the session state. Please note that non-serializable
objects or MarshalByRef objects are not permitted when session state mode is
'StateServer' or 'SQLServer'.

What are the objects I can't use and why not?

The code I was looking at was :
****************************************************************************
****
<%@ Page Language="VB" Debug="False" Explicit="True" Buffer="True"%>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<html><head><title>Drilldown Datagrid Searching Within
Results</title></head>
<script runat="server" language="VB">
Sub Page_Load(Source As Object, E As EventArgs)
Response.BufferOutput = "True"
If Len(Request("search")) > 0 Or Len(Request("sub")) > 0 Then
If Len(Request("search")) > 0 Then Session.Clear()
MyDataGrid.CurrentPageIndex = 0 ' resets the Datagrid to page 1
BindGrid()
subsrch.visible = "true"
Else
subsrch.visible = "false"
End If
End Sub

Sub BindGrid()
Dim Source As DataView

If Len(Request("search")) = 0 Then Source = CType(Session("CachedGrid"),
DataView)
If IsNothing(Source) Then
Dim MyConnection As SqlConnection
Dim MyCommand As SqlDataAdapter
Dim RcdCount As integer
Dim DS As DataSet

Dim sqlQuery As String = "SELECT emp_id, fname, lname FROM employee where
(fname like '%" & Request("search") & "%' or lname like '%" &
Request("search") & "%') Order by emp_id asc"

Dim strConn As String = "server=(local);uid=sa;pwd=;database=pubs;"
MyConnection = New SqlConnection(strConn)
MyCommand = New SqlDataAdapter(sqlQuery, MyConnection)
DS = new DataSet()
MyCommand.Fill(DS, "MyDataGrid")
MyDataGrid.CurrentPageIndex = 0
Source = DS.Tables(0).DefaultView
' Insert Dataset into Session
Session("CachedGrid") = Source
End If
If Len(Request.Form("sub")) > 0 Then
Session ("Sub") &= " and (fname LIKE '%" & Request.Form("sub") & "%' or
lname LIKE '%" & Request.Form("sub") & "%') "
Source.RowFilter = Session ("Sub").SubString(5)
End If
If (Source.Count.ToString) >= 1 Then
MyDataGrid.visible = "true"
Else
msg.text = "<br><b>No records found</b>"
subsrch.visible = "false"
MyDataGrid.visible = "false"
End If
Try
'Get count from Dataview row count, same as Datagrid row
count
count.text = "<b>" & Source.Count.ToString & "
</b>results found<br>"
MyDataGrid.DataSource = Source
MyDataGrid.DataBind()
Catch e As Exception
MyDataGrid.CurrentPageIndex = 0 'reset the Datagrid back
to page 1 on any errors
End Try
End Sub

Sub MyDataGrid_Page(sender As Object, e As
DataGridPageChangedEventArgs)
MyDataGrid.CurrentPageIndex = e.NewPageIndex
BindGrid()
End Sub
</script>
<body bgcolor="#FFFFFF" topmargin="0" marginheight="0"
onLoad="document.forms[0].search.focus();">
<center>
<h3>Datagrid Drilldown Search Example</h3>
<form method="post">
<input type="text" name="search">
<input type="submit" Value="Go">
</form>
<form runat="server">
<span id="subsrch" runat="server">
Search Within results
<input type="text" name="sub">
<input type="submit" Value="Go">
</span>
<br><asp:label id="msg" runat="server" />
<br><asp:label id="count" runat="server" />
<ASP:DataGrid id="MyDataGrid" runat="server"
AllowPaging="True" PageSize="10" PagerStyle-Mode="NumericPages"
PagerStyle-HorizontalAlign="Right"
PagerStyle-NextPageText="Next" PagerStyle-PrevPageText="Prev"
OnPageIndexChanged="MyDataGrid_Page"
BorderColor="black" BorderWidth="1" GridLines="Both" CellPadding="3"
CellSpacing="0" Font-Name="Verdana"
Font-Size="8pt" HeaderStyle-BackColor="#FF8040"
AlternatingItemStyle-BackColor="#eeeeee" />
</form>
</center>
</body>
</html>
****************************************************************************
********

There are some asp.net objects as well as some "input" html. These normally
work.

What is the serialization that they are talking about that I can't use?

Thanks,

Tom
Click to expand...
 
T

tshad

WJ said:
Unable to serialize the session state. Please note that non-serializable
objects or MarshalByRef objects are not permitted when session state mode
is 'StateServer' or 'SQLServer'.
Click to expand...

To store session state to stateServer and or Sql Server (ASPState), your
class must be marked as [Serializable]. Otherwise, only InProc can handle
stuffs like dataGrid. See example below:
Click to expand...

But this isn't a class.

It is just a straight ASP.NET page. I don't add anything that says it is
Serializable, so what is causing this page not to work?

Tom
namespace nSession
{
[Serializable()]
public class cSession
{
public string YourName;
public DateTime YourDOB;

public cSession()
{
}
}
}
*********************
There is a good article about SS, click here:
http://www.eggheadcafe.com/articles/20021016.asp

John
Click to expand...
 
T

tshad

Robert Smith said:
The message I get is:

Unable to serialize the session state. Please note that non-serializable
objects or MarshalByRef objects are not permitted when session state mode is
'StateServer' or 'SQLServer'.
Click to expand...

That was the message I got.

I just don't know why this page gives me the message, when all the other
pages (about 150) don't.

Tom
tshad said:
I switched my site from InProc to StateServer a while ago which solve a
problem I was having dropping my session cookies when the worker process
recycles.

This has been working well until today.

I was looking at some sample code and found that it won't work under
StateServer, but will under InProc.

The message I get is:

Unable to serialize the session state. Please note that non-serializable
objects or MarshalByRef objects are not permitted when session state
Click to expand...
mode
is
'StateServer' or 'SQLServer'.

What are the objects I can't use and why not?

The code I was looking at was :
Click to expand...
****************************************************************************
****
<%@ Page Language="VB" Debug="False" Explicit="True" Buffer="True"%>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<html><head><title>Drilldown Datagrid Searching Within
Results</title></head>
<script runat="server" language="VB">
Sub Page_Load(Source As Object, E As EventArgs)
Response.BufferOutput = "True"
If Len(Request("search")) > 0 Or Len(Request("sub")) > 0 Then
If Len(Request("search")) > 0 Then Session.Clear()
MyDataGrid.CurrentPageIndex = 0 ' resets the Datagrid to page 1
BindGrid()
subsrch.visible = "true"
Else
subsrch.visible = "false"
End If
End Sub

Sub BindGrid()
Dim Source As DataView

If Len(Request("search")) = 0 Then Source = CType(Session("CachedGrid"),
DataView)
If IsNothing(Source) Then
Dim MyConnection As SqlConnection
Dim MyCommand As SqlDataAdapter
Dim RcdCount As integer
Dim DS As DataSet

Dim sqlQuery As String = "SELECT emp_id, fname, lname FROM employee where
(fname like '%" & Request("search") & "%' or lname like '%" &
Request("search") & "%') Order by emp_id asc"

Dim strConn As String = "server=(local);uid=sa;pwd=;database=pubs;"
MyConnection = New SqlConnection(strConn)
MyCommand = New SqlDataAdapter(sqlQuery, MyConnection)
DS = new DataSet()
MyCommand.Fill(DS, "MyDataGrid")
MyDataGrid.CurrentPageIndex = 0
Source = DS.Tables(0).DefaultView
' Insert Dataset into Session
Session("CachedGrid") = Source
End If
If Len(Request.Form("sub")) > 0 Then
Session ("Sub") &= " and (fname LIKE '%" & Request.Form("sub") & "%' or
lname LIKE '%" & Request.Form("sub") & "%') "
Source.RowFilter = Session ("Sub").SubString(5)
End If
If (Source.Count.ToString) >= 1 Then
MyDataGrid.visible = "true"
Else
msg.text = "<br><b>No records found</b>"
subsrch.visible = "false"
MyDataGrid.visible = "false"
End If
Try
'Get count from Dataview row count, same as Datagrid row
count
count.text = "<b>" & Source.Count.ToString & "
</b>results found<br>"
MyDataGrid.DataSource = Source
MyDataGrid.DataBind()
Catch e As Exception
MyDataGrid.CurrentPageIndex = 0 'reset the Datagrid back
to page 1 on any errors
End Try
End Sub

Sub MyDataGrid_Page(sender As Object, e As
DataGridPageChangedEventArgs)
MyDataGrid.CurrentPageIndex = e.NewPageIndex
BindGrid()
End Sub
</script>
<body bgcolor="#FFFFFF" topmargin="0" marginheight="0"
onLoad="document.forms[0].search.focus();">
<center>
<h3>Datagrid Drilldown Search Example</h3>
<form method="post">
<input type="text" name="search">
<input type="submit" Value="Go">
</form>
<form runat="server">
<span id="subsrch" runat="server">
Search Within results
<input type="text" name="sub">
<input type="submit" Value="Go">
</span>
<br><asp:label id="msg" runat="server" />
<br><asp:label id="count" runat="server" />
<ASP:DataGrid id="MyDataGrid" runat="server"
AllowPaging="True" PageSize="10" PagerStyle-Mode="NumericPages"
PagerStyle-HorizontalAlign="Right"
PagerStyle-NextPageText="Next" PagerStyle-PrevPageText="Prev"
OnPageIndexChanged="MyDataGrid_Page"
BorderColor="black" BorderWidth="1" GridLines="Both" CellPadding="3"
CellSpacing="0" Font-Name="Verdana"
Font-Size="8pt" HeaderStyle-BackColor="#FF8040"
AlternatingItemStyle-BackColor="#eeeeee" />
</form>
</center>
</body>
</html>
Click to expand...
****************************************************************************
********

There are some asp.net objects as well as some "input" html. These normally
work.

What is the serialization that they are talking about that I can't use?

Thanks,

Tom
Click to expand...
____________________________________________________________________________
___
Posted Via Uncensored-News.Com - Accounts Starting At $6.95 - http://www.uncensored-news.com
<><><><><><><> The Worlds Uncensored News Source
Click to expand...
 
W

WJ

tshad said:
But this isn't a class.

It is just a straight ASP.NET page. I don't add anything that says it is
Serializable, so what is causing this page not to work?
Click to expand...

Trap these statements below to see if its bombed out:

Dim Source As DataView
If Len(Request("search")) = 0 Then Source =
CType(Session("CachedGrid"),DataView)

If the error happens here then DataView is not serializable ! Keep in mind
that "Inproc" will work with DataSet, Table, View ,Grid...

John
 
W

WJ

Correction: I was too fast. It should be:

' Insert Dataset into Session
Session("CachedGrid") = Source
End If

The above Session "write" statement may have caused the error because the
Source is DataView, which may not work with State and SQL Servers. But I
could be wrong. IOW, you must find out where the exception takes place.

Sorry.

John

WJ said:
Trap these statements below to see if its bombed out:

Dim Source As DataView
If Len(Request("search")) = 0 Then Source =
CType(Session("CachedGrid"),DataView)

If the error happens here then DataView is not serializable ! Keep in mind
that "Inproc" will work with DataSet, Table, View ,Grid...
Click to expand...

John
 

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