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Object is not defined in current context

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answered on 28 May 2008, 02:31 PM

Hello Hasan ARSLAN,

There is a report in our examples called List Bound Report, that demonstrates how to use object datasource and it is working properly with the latest version of our product.

If your report works fine in Preview, I suppose that this behavior is caused by the code in your application that creates and provides data to the report.

In order to help you we need a sample project that reproduces the described issue. So please open a support ticket and send us a simple project with a report and viewer that we can examine and provide you assistance.

Thank you for your cooperation.

All the best,
Milen
the Telerik team

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answered on 21 Nov 2008, 03:47 PM

Hi,

i don't know whether this issue has been resolved, but I thought I'd share my experience with this eluding problem. My project is a ASP.NET 2.0 website, and I'm using the most recent version of Telerik.Reporting: 2008.31105 (which is 2008 Q3).

The report is retrieveing data via NeedDataSource event. It works in design-view / preview mode, but in production shows error messages "The expression contains object 'textbox' that is not defined in the current context." for all textboxes.

I am using MySql Connector.Net (most current version; 5.2.3), and thus also using MySqlDataAdapter to fill the dataset.

The problem, for me, was not related to culture or collation in the database / web application. It was simply because I had implemented my own custom session handler - for MySQL - which has been running without incident or other errors for my web project in all other regards. As soon as i disabled it and returned to default session handler in web.config - everything works fine!

Does ayone have thoughts on why this problem occurs in Reporting because of a custom session handler?

regards,
Ernst

answered on 24 Nov 2008, 08:16 AM

Hi all,

I faced the same problem with my custom session state provider with the backing store Memcached or even with the StateServer provided by ASP.Net. I can reproduce the problem using Telerik.Reporting v2.9.8.1105(Q3 - 2008). The error given is:

An error has occured while processing TextBox 'textBox1':
The expressioncontains object 'ItemName' that is not defined in the current context.

I read some entries in Telerik report forums, saying that it has some problems with report parameters when using "out of process session modes" and they have fixed this in Q2 - SP2. In my situation, NeedDatasource event for Report is not being called when the app. session is not working InProc mode.

I can open a support ticket and upload a sample project to you, but it is very easy to reproduce for you and i don't want to waste my business hours trying to reproduce others problems. It is unacceptable for us to use the report tool until this issue is fixed.

--ilker

answered on 25 Mar 2009, 12:38 PM

Hi Antonio,

The Report.NeedDataSource event is raised only if there is no data source set for the Report. For more information on the Report events please see Using Report Events help topic.

Sometimes one may need to use different data sources at design time and run time. If you have set the data source at design time you have to reset it at runtime to have the NeedDataSource event fired. Since the designer places all the initialization code inside the InitializeComponent() method the best place to reset the Report.DataSource property is at the end of the report's constructor like this:

    
            public class MyReport1 : Telerik.Reporting.Report 
        
            { 
        
                public MyReport1() 
        
                { 
        
                    InitializeComponent(); 
        
                    // Reset the data source enable the NeedDataSource event: 
        
                    this.DataSource = null; 
        
                    // this.DataMember = string.Empty; 
        
                } 
        
            }

Regards,
Svetoslav
the Telerik team

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answered on 10 Jan 2012, 05:07 PM

Hi Guys,This is how Im binding my report and i get the same error.

Any Help?
Please

if (HttpContext.Current.Session["circuitos"] != null && HttpContext.Current.Session["RepPuesto"] == null)

{

List<IQueryable> products = new List<IQueryable>();

List<int> values = (List<int>)(HttpContext.Current.Session["circuitos"]);

ListaMenores.Clear();

Int32[] circs = {

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,

23, 24, 25,

26, 27, 28, 29, 30, 31, 32

};

var Circuitos = values.Intersect(circs);

foreach (var value in Circuitos)

{

IQueryable valorRetorno = (from r in contextoSIDRJF.Ratificacions

from d in contextoSIDRJF.Documentoes

from pr in contextoSIDRJF.ProxRatificar

from jf in contextoSIDRJF.vw_JuzgadoresFederales

where

r.fiIdExpJuzgador == jf.exp && pr.fiExpJuzgador == r.fiIdExpJuzgador &&

r.fiStatus == 3

&& d.fiIdRatificacion == r.fiIdRatificacion && d.fiIdTpoDocto == 5 &&

(d.fdFchSesionDicRat >= fecha && d.fdFchSesionDicRat <= fecha2) &&

jf.Circuito == value

orderby jf.Circuito

select new

{

r.fiIdExpJuzgador,

jf.nombre_completo,

jf.nom_pue,

jf.Circuito,

d.fdFchSesionDicRat

//d.fdFchSesionDicRat

});

products.Add(valorRetorno);

// ListaMenores.Add(valorRetorno);

if (Circuitos.Last() == value)

{

Report.DataSource =products ;

}