Serialize Linq To SQL Entities For Use In Out - Of - Proc Session State?

Mar 11, 2010

I need to put some of the entities created via a.dbml Linq-To-Sql file into Session State. Because I am using out-of-proc State Server, they need to be serializable. How can I achieve this? I have tried setting the Serialization mode in the .dbml file to 'Unidirectional'.

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Dec 12, 2010

I am new to .net 4.0 and am using EF Model and SessionState Mode=SqlServer and I am getting this error below:

Unable to serialize the session state. In 'StateServer' and 'SQLServer' mode, ASP.NET will serialize the session state objects, and as a result non-serializable objects or MarshalByRef objects are not permitted. The same restriction applies if similar serialization is done by the custom session state store in 'Custom' mode.

I checked the stack trace and its complaining about

[assembly: global::System.Data.Objects.DataClasses.EdmSchemaAttribute()]
[assembly: global::System.Data.Objects.DataClasses.EdmRelationshipAttribute("PoplarGroveModel", "tblMenuRole", "tblMenu", global::System.Data.Metadata.Edm.RelationshipMultiplicity.Many, typeof(PoplarGroveDataModel.Menu), "tblRole",

[Code].....

I marked it as serializable but then it complains about System.Data.Objects.ObjectContext is not marked as serializable and hence throws the same error.

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Just wanted to know in which type of web applications we can use or its good to use the out proc (SQL Server, State Server) session mode?

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Getting error when trying to save structured arraylist into session Variable (see btnTS_Click below)

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Try It: [URL] ....

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[Code]...

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Unable To Serialize Session State - Server Errors

Oct 14, 2010

We have been receiving reports of the following server error periodically from users.
[OutOfMemoryException: Exception of type System.OutOfMemoryException was thrown.]
[HttpException (0x80004005): 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".

Once in a state where this error appears, it appears to be hit or miss whether the errors are reproducible locally. If they are, then we can usually reproduce them for a couple minutes, but not on every page hit. This usually tapers off on its own and usually has resolved itself by the time we get back in contact with the users. The Web Service has around 90-100 active connections during business hours. The only other site on this server is the staging version of this site, which gets hit very infrequently. The Session State is stored on the same SQLServer instance as the application database which is housed on a fairly large cluster of virtual machines.

Neither the Web Server or the SQLServer seemed to be taxed (either processor or memory-wise) while this is going on. The distribution of which pages are erroring seems to be comparable to the normal distribution for each page. There doesn't appear to be any pattern in terms of times of occurrence. We do have less errors on average on weekends (which correlates to normal site load), but even this appears to not be consistent. There also doesn't appear to be a correlation between the errors logged and any kind of logged performance monitor events. This includes an array of perfmon counters including:

.NET CLR Jit(w3wp)
otal # of IL Bytes Jitted
.NET CLR Jit(w3wp)IL Bytes Jitted / sec
.NET CLR Jit(w3wp)\% Time in Jit
.NET CLR Jit(w3wp)# of Methods Jitted
.NET CLR Jit(w3wp)# of IL Bytes Jitted
ASP.NET Apps v1.1.4322(__Total__)Requests Failed
ASP.NET Apps v1.1.4322(__Total__)Errors Unhandled During Execution/Sec
ASP.NET Apps v1.1.4322(__Total__)Errors Unhandled During Execution
ASP.NET Apps v1.1.4322(__Total__)Cache Total Turnover Rate
ASP.NET Apps v1.1.4322(__Total__)Errors During Preprocessing
ASP.NET Apps v1.1.4322(__Total__)Errors During Execution
ASP.NET Apps v1.1.4322(__Total__)Requests Executing
ASP.NET Apps v1.1.4322(__Total__)Requests Total
ASP.NET Apps v1.1.4322(__Total__)Errors Total
ASP.NET Apps v1.1.4322(__Total__)Sessions Abandoned
ASP.NET Apps v1.1.4322(__Total__)Errors Total/Sec
ASP.NET Apps v1.1.4322(__Total__)Anonymous Requests/Sec
ASP.NET Apps v1.1.4322(__Total__)Requests/Sec
ASP.NET Apps v1.1.4322(__Total__)Session SQL Server connections total
ASP.NET Apps v1.1.4322(__Total__)Cache Total Hit Ratio
ASP.NET v1.1.4322Requests Current
ASP.NET v1.1.4322Request Execution Time
MemoryPages/sec
Bytes Total/sec
PhysicalDisk(_Total)Avg. Disk Queue Length
Processor(_Total)\% Processor Time
Web Service CacheFile Cache Hits %
Web Service CacheFile Cache Misses
Web Service CacheFile Cache Hits
Web Service(_Total)Current Connections
Web Service(_Total)Post Requests/sec)

The only pattern I can see in the logs doesn't correlate to the occurrence of these errors, but is the only pattern I can see. Looking at the perfmon logs we are seeing a pattern where the "Total # of IL Bytes Jitted", "IL Bytes Jitted / sec", "% Time in Jit", "# of Methods Jitted", and "# of IL Bytes Jitted" counters for the staging site (which shouldn't be getting any traffic) doesn't pull data for a 20-50 minute period after which there is an immediate spike in "IL Bytes Jitted / sec" and a jump in "% Time in Jit" for 2-20 minute of up to 99% for the main site.

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Mar 18, 2011

I'm trying to save a custom class in a session, but it just never gets saved, along with other sessions. Note that my SessionMode = STATESERVER, and i cannot change it to INPROC as per our business requirement. This is my class

/*******START*******/
[Serializable]
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{
private int _userId;
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{
get { return _userId; }
set { _userId = value; }
}
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{
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private List<Sites> _assignedSites;
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{
get { return _assignedSites; }
set { _assignedSites = value; }
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{
//Constructor code
}
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protected User(SerializationInfo info, StreamingContext context)
{
this._userId = (int)info.GetValue("_userId", typeof(int));
this._assignedSites = (List<Sites>)info.GetValue("_assignedSites", typeof(List<Sites>));
this._tdbUserDetails = (TDB.tdbUser)info.GetValue("_tdbUserDetails", typeof(TDB.tdbUser));
}
[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.SerializationFormatter)]
void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
{
info.AddValue("_userId", this._userId);
info.AddValue("_assignedSites", this._assignedSites);
info.AddValue("_tdbUserDetails", this._tdbUserDetails);
}
}
/*******END*******/

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Type 'System.Data.Linq.ChangeTracker+StandardChangeTracker' in Assembly 'System.Data.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable

have read all threads but still cant solve the error. I can do insert update and delete but dont know where exactly the error occurs and how??

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Using the following code:

Private Sub MakeMeSomeXmlBeforeRyanGetsAngry()
Dim db As New MyDBDataContext
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Dim sb As StringBuilder = New StringBuilder
Dim writer As XmlWriter = XmlWriter.Create(sb)
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Type 'System.Data.Linq.DataQuery`1[MyDB.Customer]' cannot be serialized. Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute. See the Microsoft .NET Framework documentation for other supported types.

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I am Developing A Application . I want to develop this Application with Linq and used Stored proc in linq Plz give me Some suggestion How we used And If You Have Some Related Topic

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[Code]....

I got the above Linq to entities method from here: [URL]

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The code is currently:

var message = from m in soe.Messages.Include("ChildMessages")
where m.ID == id
&& m.IsActive
select m;
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What I really want is to only return 1 Message (that is equal to a particular ID and isActive) with all of its Active ChildMessages and I want to do it in one call to the database.

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C# - Temp Table In LINQ To Entities?

Nov 4, 2010

I have a table of user ids that is huge.

I have an array of user ids that I want.

I have two tables that have a foreign user id key.

What is the best way to get this information performance wise?

Ideally in SQL the final result would be somewhat like this (null values if there is no user ID in one table but not the other):

userid table1value table2value
1 null 12
5 123 null

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