.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Object Scope

Posted By:      Posted Date: October 18, 2010    Points: 0   Category :ASP.Net

If I declare my object at the beggining of my page class, and instantiate it in a dropdownlist selected_index change event.  Shouldn't this object be available thru out the entire page and also persist thru a postback ?  I lose the object in my selected date change event in my calendar.  Any ideas?


Imports recordRequestDB
Imports MiscFunctions
Imports thisuser
Imports System.Collections.Generic
Imports System.Data
Imports System.Data.SqlClient
Imports Employee

Partial Class Admin_request_a
    Inherits System.Web.UI.Page

    Dim oEmployee As Employee
    Dim myDates As New List(Of Date)
    Dim blnAllOrNothing As Boolean = False
    Dim intThisEmployee As Integer

    Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init

    End Sub

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        If IsPostBack Then

            'I have tried with and without this line
            oEmployee = CType(Session("thisEmployee"), Employee)


            'Check if an employee is selected.  We cannot continue, if an employee is not selected
            If DropDownList1.SelectedIndex = 0 Then


View Complete Post

More Related Resource Links

how to store the values in a object variable (package level scope) in a script component

I have declared a variable of object type with package level scope.  I want to assign values to this variable inside a script component.  My object should hold 5 columns in a row.  How to implement this ?

Data transformation: Sharing object/variable scope between form and dialog (VS2010/VB)


I am writing a class to provide data transformation between two databases with different schema, and have a windows form which tries to do the data translation work, and a modal showDialog which pops up to halt and tweak the process when errors are detected.

The dialog needs to share, tweak, and pass control information to the main form to tweak the transform parameters until everything works OK.  My question is how to best achieve the data sharing since the dialog has separate data scope.  I have been using declarations like the folllowing to successfuly share data and avoid creating public variables:

     Friend importStatusMessage as string

But with all the variables the dialog needs to tweak, it's becoming messy.  Is there any way to declare the entire dialog as 'Friend' so that main form data is in scope to the dialog?  Or, maybe create an object with properties to pass the data, and share only the object?



Thinking about new C# method prototypes: object as dictionary

I recently had to write a small Flickr API. I know many .Net API for Flickr already exist but I needed one for a Silverlight application. Whatever, it's only about building some querystrings so I did it by myself. It's been an opportunity to think again about a classical question: how to pass parameters to a method ?

Imagine you have a generic method to call some Flickr functions.

C# Object Oriented Programming

So far in C# Essentials we have looked at the basics of programming in C# such as variable types and flow control. Although it would be possible to write a functional program using these techniques, there is much more to becoming a proficient C# programmer. C# is, above all, an object oriented programming language and as such any C# programmer will be expected to create object-oriented applications using this language.

Object Oriented Programming

Four core concept of OOP Object Oriented Programming. 1.Inheritance, 2.Polymorphism, 3.Abstraction and 4.Encapsulation

Object-Oriented Programming Concepts

This is the first in a series of articles describing the use of object-oriented programming techniques as implemented by the C# programming language. This series follows the C# Fundamentals tutorial that beginners are advised to read first.

Overview of SharePoint Object Model

SharePoint offers a set of structured server-side objects those are widely used to program SharePoint Applications. These objects are hierarchically arranged and you can drill down through the object hierarchy to obtain the object that contains the components of SharePoint Application you need to use in your code.

What is the difference between "dynamic" and "object" keywords?

Let's take a quick look at the object keyword first. I'm not going to talk a lot about it because it's been around since C# 1.0. This keyword is nothing more than a shortcut for System.Object, which is the root type in the C# class hierarchy. (However, as Eric Lippert pointed out in his blog post, not everything in C# derives from object.) This is a powerful mechanism, since you can assign almost any value to instances of this type.

How to bind GridView and DropDownList controls using DataTable object

In .net framework 2.0, you can load a DataTable in memory by consuming a data source using a DataReader. In this version you will find the flexibility in accessing the DataReader means write access code once and use again and again using DataReader. To see the functionality of DataTable consider an example that is created using VS2005.

'Model' cannot be declared in this scope


I have a complex partial view (ugly stuff), the view page has this line:- 

<% Html.RenderPartial("PartialIndicatorWeighting", indicator);%>
and inside the ugly partial view I have this,
<td><%: Model.Active %><%: Html.CheckBoxFor(Model => Model.Active)%></td>
I'm trying to display a list of checboxes to show if the item is active or not, I get the following error:-
A local variable named 'Model' cannot be 

Jscript error: Object does not support property or method


 Hi, i have little knowledge on javascript but i need to use this code get from somewhere for a jquery to work.

I face this "Jscript runtime error: Object does not support property or method" whenever im trying to run this page.

In my experience, im get this error msg 9 out of 10 times i use javascript in my system.

Im using Microsoft Visual web developer 2008, i wonder if this is related to my problem, i not sure there is anything i need to add as reference or update anything.

But anyway, in short, i just couldn't use javascript code when using this development tool because of this sort of error.

Anyway, it happen that last time i tried use the same type of jquery code in another project and it seems to work well without an error.

But now when im try to use it again in this recent project i created, it come out with this error and i have no idea how to solve it even look through google and this forum.

It doesn't really seems like its the code problem itself although im not sure, because any javascript code just couldn't work.

So below is my code that i need to use.

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" ></script>
<script type="text/javascript" src=&quo

Pass ASP.NET membership identity object across domain?


I am trying to figure a way to SSO with ASP.NET membership and role model.

I can implement custom membership provider which consume web services hosting on a server.

With encryption of data. No problem.

But my question is, If I sign on a website with my provider, got my identity object on that application,

could I pass it to another website on another domain which use the same provider and by doing so, do not need to login again?

If this is possible, I am going to implement this solution. Please tell me what's your take on this.

Send object from one page to another



I want to create object in 1.aspx, and then send it to 2.aspx. This methods are bad, because:

1)Send object with url, like this:


This is not confidential.


Session["field1"] = "12345"; // set
Object foo = Session["field1"]; // get

This is bad too, because in 2.aspx this fields send to textboxes, and if user go to 2.aspx without 1.aspx, he'll see old data. 

command object error


Could someone please tell me what is wrong with my syntax here?  I'd be much appreciative.


objCmd = New SQLCommand("SELECT CASE WHEN objDR('Item') = 'Enter Bill of Lading' then enterbol " _  

& "WHEN objDR('Item') = 'Bill of Lading History' THEN bolhistory " _  

& "WHEN objDR('Item') = 'Request Transfer' or objDR('Item') = 'View Transfer in Progress' THEN transfers " _  

& "END  from plantGroups where plantgroupid=@plantgroupid", objConn)

type object parameter



I have a problem I can't figure out.

I've been trying to add a listbox with multi select enabled as a parameter to my select statement in sqldatasource.

So i created a function like this :

string strItemTypes = "";
foreach (ListItem li in lbItemType.Items)
   if (li.Selected)
      strItemTypes += "," + li.Value;
strItemTypes = strItemTypes.Substring(1);

which gives me the selected items like this for example : "1,2,3"...
Then I've been trying to add it to my sql select statement :

SELECT tblOfficesItems.idOfficesItems, tblStockItems.Name, tblStockItems.Description, tblStockItemTypes.TypeItem, tblStockItems.Notes FROM tblOfficesItems INNER JOIN tblStockItems ON tblOfficesItems.fkItem = tblStockItems.idItem INNER JOIN tblStockItemTypes ON tblStockItems.fkTypeItem = tblStockItemTypes.idTypeItem WHERE tblStockItems.fkTypeItem IN ( @fkTypeItems )

using a hiddenfield with a controlparameter of type=object
but it just don't seem to work, seems like the data just won't bind or something and I don't get any errors so I'm confused!!

then i tried this :

SELECT tblOfficesItems.idOfficesItems, tblStockItems.Name

Business object design in master details.


Hello guys, I have the following scenario,

  1. There is a master business object containing 40 fields
  2. 2 separate child business objects
  3. If I update a child record, I have to update master's 'Last modify by' status along with 3 or more fields in master
  4. For this purpose, I don't want to initialize a separate Master class object (as most of the fields are unused/wasted)
  5. The 'last modify by' also gets updated if the records in master get updated themselves

Currently I have separate business objects for master table, Child 1, Child 2 etc.

How do I control this in my business object design ? Do I break up my master object ? Say I extract last 'modify by ' into a new class, through inheritance or some other way ?

Is there a way that whenever child gets updated I use a 'small' class to update Master status only and whenever the master itself gets updated I do the same.

Problem is that I am having redundancy in my small class (Master class also contains 'Last Modify By ',

What would you advice. Please have your say. Thank you.

Edit  I am using webforms guys.

MS Ent Lib:How do I obtain the ServerName associated with the DBCommand object?



The application I am currently working on uses Microsoft Enterprise Library Data Access block for Data Access.

I have pasted the following method to provide context:


 public static DataSet ExecuteDataSet(string connection, string procName)
            DataSet ds = null;
                SqlDatabase db = new SqlDatabase(connection);
                DbCommand dbCommand = db.GetStoredProcCommand(procName);
                ds = db.ExecuteDataSet(dbCommand);
                return ds;
            catch (Exception ex)
               //Exception handling code


In the next release we are planning to use SQL Server 2008 R2 as our database and we will be implementing mirroring to provide automatic failover.

I have been tasked with rewriting the DAL to take advantage of this.

A sample  connection string used by the application today is as below:


ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend