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How to make linq Object Serializable... 'System.Data.EnumerableRowCollection is not marked as Seriz

Posted By:      Posted Date: September 24, 2010    Points: 0   Category :.NET Framework
 

Dear All,

Is it possible to make the linq object as serializable. I need to pass the serialized Data as parameter to the Remoting Method.

My LinQ Query is as follows

 Dim LinqQuery = From R In dsEdit.Tables(0) _

                    Where R.Field(Of Integer)("ID") < 400 _

                    Select R

ZipObject(LinqQuery)

The Definition of ZipObject is as follows.

 

 

  Public Function ZipObject(ByVal obj As Object) As Byte()

        Dim ms


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More Related Resource Links

'System.Data.DataRow' not marked as serializable

  

Hi,

 

I am getting the following error when attempting to persist my work flow.

 

Type 'System.Data.DataRow' in Assembly 'System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable.

 

Any ideas?

The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced. You must

  

Hi,

This is frustrating, and I don't know how to solve it.

I have a strange problem. I am adding a LinqDatasource object, and set the context:

        protected void LinqDataSource_ContextCreating(object sender, LinqDataSourceContextEventArgs e)
        {
            e.ObjectInstance = new KaruselaDataContext(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
        }


Then I get this error:
The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

 

On web.config I already have this:
<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>

NOTE: The datacontext is in a different project (DLL proect) where I added a refernce to System.Data.Linq.

is there another way adding a refernce to a web project? or only though teh web.config?

Thanks.


Urgent How to Create it ,Object Data Source ,Linq and sql or other any way

  

my query is

SELECT a.HD, a.HEAD, a.SH, a.SUBHEAD, a.TRK, a.TRACK, a.TGT, a.TARGET, a.PDC, a.DT_RELEASE, a.STATUS, a.CO
FROM V_HIERARCHY1 a

 

my data is

HR    HR    Rec    Records    Leave    Leave Records    HRL.0001    Policy and Process for leave record.    27.06.2010    30.06.2010    WIP    Edlink
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HR    HR    DB    Database    SAL    Salary    DDS.0001    Calculation of Monthly salary    08.08.2010    09.08.2010    WIP    Edlink
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Unable to Create Object Variable for Linq Data Class

  

For some unknown reason I suddenly am unable to create an object variable for a Linq Data Class. If I create a new project and try the process again with the same database everything works as advertized.

The code I am using is Dim db As New RoggDataContext  which gives me an error on the object variable "db": Overload resolution failed because no accessibility 'NEW'  accepts this number of arguments.

I have looked inside every file in the Web Project like the web config to check the connection string, gobal, and designer.vb looking for any errors whit no JOY.  I also tried to create a new form and code behind with a button and received the same error.

This is mind blowing because as I already stated, I can create a new Web Site and the problem goes away.

Any help is appreciated!

 

Shawn




System.Data.SqlClient.SqlException: Invalid object name

  

I am getting this error message

System.Data.SqlClient.SqlException: Invalid object name 'Members'.

The database name is ACEStaff

I copied it accross from my old server to my new one

The table name in the database is Acestaffrm.members. Is the Acestaff prefix giving me this problem. I notice other table have dbo. prefix

Any suggestions on the problem here

 


 


Make several changes across postbacks to an object in EF data module and view changes before persist

  

Is there a way to make several changes across postbacks to an object in an Entity Framework (.net 4) data module, view the data with changes (such as in a gridview), and then user clicks save to persist to the database?


Unable to cast object of type 'System.Data.SqlClient.SqlCommand' to type 'System.IConvertible'.

  

using

System;

using

System.Collections;

using

System.Configuration;

using

System.Data;

using

System.Linq;

using

System.Web;

using

System.Web.Security;

using

System.Web.UI;

No mapping exists from object type System.Xml.Linq.XDocument to a known managed provider native type

  

Hello,

I am using XML in getting client data in 3-tier architecture, using XDocument in passing XML among layers.

But when I use it in inserting this XML in XDocument, it throws the following error:

No mapping exists from object type System.Xml.Linq.XDocument to a known managed provider native type. 

I am using the following code, it throws the exception at the bold line:

 public void DALInsertXML(XDocument x)
        {
            SqlConnection connection = new SqlConnection(connection1);
            connection.Open();
            _command = ne

Type 'System.Runtime.Remoting.ServerIdentity' is not marked as serializable.

  
Hi, I miss a trouble in my current workflow project, and it will cause my workflow instance terminate.  The exception as following. It says ServerIdentity  is not marked as serializable, but ServerIdentity is absolutely serializable.. anyone can help me? thanks a lot.


Code Snippet

Type 'System.Runtime.Remoting.ServerIdentity' in Assembly 'mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable. System.Runtime.Serialization.SerializationException: Type 'System.Runtime.Remoting.ServerIdentity' in Assembly 'mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable. at System.Runtime.Serialization.FormatterServices.InternalGetSerializableMembers(RuntimeType type) at System.Runtime.Serialization.FormatterServices.GetSerializableMembers(Type type, StreamingContext context) at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitMemberInfo() at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter) at System.Runtime.Serialization.Formatters.Binary.WriteObj

Unable to cast object of type 'System.Data.DataSet' to type 'DataSet'.

  
Specifications : VS 2008 & SQL 2005 Express
Unable to cast object of type 'System.Data.DataSet' to type 'DataSet'.
I'm getting this error in cliend app, while passing values to the wcf service(iis),
WCF Sevice code
  public DataSet ListofAccounts(string custidno)
  {
    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConStrWestSideBank"].ConnectionString);
    SqlDataAdapter da = new SqlDataAdapter("select * from AccountDetails where vCustIdentityNo ='" + custidno + "'", con);
    DataSet ds = new DataSet();
    da.Fill(ds, "AccountDetails");
    return ds;
  }
I'm unable to get this, i tried in many ways but no use, please help me. Follwing is the code,of button click event 
   ServiceReference1.ServiceClient svcobj = new

Linq - add data to database then email user the details

  

Hi all

I'm not sure how to structure the code for this but what I want to do is be able to add data to a database, and once this has completed successfully, then email the user to say the details have been added successfully to the database.

I need to:

1. Check that the relevant data has been added into the database then

2. Email the details of the relevant data when completed. 

 

Thanks in advance for your help,

Laura

 

 


Need Syntax To Make Results of LINQ Union Return Non-Generic Type

  

Hi.

I have the below SQL which works just fine:

SELECT     Message, CreateDate, AccountId, AlertTypeId
FROM       dbo.Alerts
UNION
SELECT     TOP (100) PERCENT Status, CreateDate, AccountId,
                          (SELECT     10 AS Expr1) AS AlertTypeId
FROM         dbo.StatusUpdates
WHERE AccountId = PassedInParameter
ORDER BY CreateDate DESC

I have been going about trying to convert the above into a LINQ method and am having problems with return types.
As the above SQL illustrates, I am querying two distinct LINQ tables - Alerts and StatusUpdates -
and then attempting to perform a Union on them. In order to do the union in LINQ, I have to have agreeing types. So, I
am using "var" to make the results of "alerts" and "updates" generic before the union.  

public IList GetStatusUpdatesAsAlertsByAccountId<T>(Int32 accountId)
        {
            using (WorkbookDataContext dc = _conn.GetCont

System.Xml.Linq.XElement and XPathDocument

  

I have an XPathDocument that I want to save to a table using LINQ, but I get this error

cannot implicitly convert type 'System.Xml.XPath.XPathDocument' to 'System.Xml.Linq.XElement'


I create the XPathDocument from some (valid) xml contained in a resource file


XPathDocument xDoc = new XPathDocument(new StringReader(Resource1.TestXML));


when I try to assign it with LINQ, it flags up an error


NewDataItem.XML = xDoc  ----  error here

NewDataitem is a LINQ to SQL object created from the underlying table, 'NewDataItem.XML' is a column type of 'XML'


how do i (easily) convert xDoc so I can pass it into the LINQ object ?




Posting data to ASMX and return Object for jQuery

  

I am using fluent NHibernate with WebForms and I am trying to build a page where I allow a user to post a status update on their profile page and I a using a .asmx WebService to post the data to the database and then returnig a StatusUpdate instance to the page to be used by jQuery. I have a couple problems.

1) First off when I return a string from the WebService(i was testing) the textbox where the user enters their status doesnt empty the contents. And since the page doesnt refresh even if I manally clear out the textbox and put in something else, it still posts the previous status to the database again. How do I fix this?

2) Secondly, when I return the StatusUpdate Object from the Webservice I cant the results to display anything. Like I sad, Im using jQuery to make an AJX call to the WebService.

Here is my code:

User Profile Page:

<p>
Status: <asp:Label ID="status" runat="server"></asp:Label><span style="font-size:.7em;"><asp:Label ID="statustime" runat="server"></asp:Label></span><br />
<textarea id="statusBox" rows="3" cols="40"></textarea><br />
<input type="button" value="Update Status" onclick="SetStatus(); return false;

Data Points: LINQ Projection Queries and Alternatives in WCF Services

  

LINQ's ability to project randomly shaped data into anonymous types can be a blessing and a source of frustration, says Julie Lerman. It's great when you just need to grab a special view of your data, but it can be problematic in certain circumstances. She explains what the limitations are and how to get around them.

Julie Lerman

MSDN Magazine May 2010


Data Points: Precompiling LINQ Queries

  

Did you know that by precompiling LINQ queries you might actually be degrading your app's performance if you're not careful? Julie Lerman explains how to ensure you're not re-precompiling queries each time and losing the expected performance benefits across post-backs, short-lived service operations and other code where critical instances are going out of scope.

Julie Lerman

MSDN Magazine March 2010


SOA Data Access: Flexible Data Access With LINQ To SQL And The Entity Framework

  

Building a data access layer using LINQ to SQL and the ADO.NET Entity Framework allows you to decouple your application from the persistence technology you're using.

Anthony Sneed

MSDN Magazine December 2008


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