AJAX :: Reference Not Set To An Instance Of An Object?

Feb 19, 2011

I m Creating a Website Student Management And During Student Registration Getting this Error' Object reference not set to an instance of an object.'I m using LINQ Please Gv its Solution ASAP.my Code is :

protected void Button1_Click(object sender, EventArgs e)
{
{
StudentDataContext db = new StudentDataContext();
int flag = db.prcInsertStudent((Guid)Membership.GetUser(txtFirstName.Text).ProviderUserKey,txtRegNo.Text.Trim().ToString(), txtFirstName.Text.Trim().ToString(),
[code]...

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AJAX :: Error In AjaxControlToolkit - Object Reference Not Set To An Instance Of An Object

Mar 28, 2011

I regularly run into the following error in my .NET 4.0 web application:

[Code]....

I found that the issue was already reported here: [URL], but there is no solution provided anywhere (at least, I didn't find it).

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Web Forms :: Object Reference Not Set To An Instance Of An Object Error When Remove Reference To Site Master Page

Sep 30, 2010

in my default.aspx page i have a dropdown List and a textbox with a submit button below that there are 2 listbox... and the dropdown list holds the names of the listbox

my logic here is to select an item from the dropdown list and put some text in the text box and submit the form which will add an item to the listbox selected.. but when i do this i get an error saying Object reference not set to an instance of an object. i tried to figure out the problem and found that when i remove the reference to the Site Master Page it works fine and when i undo and apply my reference back to the Site Master Page i get the same error.

[Code]....

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MVC :: "Object Reference Not Set To An Instance Of An Object." In Ajax Calls

Feb 25, 2010

I have a list of items on my page. There is a button in each row to edit that record. Record is being edited in jquery modal window. So I make an asynchronous call to server to display detail information about record without full page refresh.

User fills in data about that record and submits. If everything is ok, user is redirected back to page. But if validation fails I want to display that entry form again with errors.

If this call is done synchronously, users gets back form with filled data and errors, but without styles and javascript (because they are referenced from mail page) - that is ok

So I just wanted to refresh that modal dialog with asynchronous call. The problem is that Html.DropDownList or Html.TextBox extension methods fail with null reference exception. I have checked that real data are passed in as second parameter.

So I don`t understand where that null reference exception occurs, or what can I do?

The same call works if it is synchronous (Html.BeginForm) but fails if it is asynchronous (Ajax.BeginForm)

what can I do with it?

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State Management :: Error Like: Object Reference Not Set To An Instance Of Reference?

Aug 25, 2010

I have a url like this:

http://www.somepage.com/main.aspx. In this page, when I click on a link it takes me to a page
http://www.somepage.com/cental.aspx?cid=200. So in the cental.aspx.cs page I did the following in the page load:

if(request.querystring["comp"].tostring() != null)
{
//do some thing [code].....

So I got an error like: object reference not set to an instance of reference.My problem is, I am using the same page. So when I go from some page, I will have "comp". but other times not. So when there is no "comp", how do I handle it in request.querystring?

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AJAX :: How To Hide The "edit" And "delete" Links/Object Reference Not Set To An Instance Of An Object

Mar 12, 2010

I am using the ajax reorderlist control from the latest Ajax Control toolkit. Based on the logged on user, I need to hide the "edit" and "delete" links. They should be visible to admin, and not visible to others. I used to control this when I was using a gridview just by calling the column and setting it's visible property to false. I have tried using:

ReorderListMinutes.TemplateControl.FindControl("lnkDeleteAgendaItem").Visible =
False

ReorderListMinutes.TemplateControl.FindControl("lnkEdit").Visible =
False

This returns an error of the dreaded "Object reference not set to an instance of an object."

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Web Forms :: Session Ended - But Server Error/ Object Reference Not Set To An Instance Of Object?

Nov 15, 2010

In the VS2005 environment, when I test my session to make sure the page redirects to the main page (itself) if the session is null, it works. There is no error.

The function I use for this is:

[code]....

However, when it is in the production environment in IIS 6.0, when the session has timed out, and I then do a postback by doing some slider control, I see the page reload but immediately thereafter, it throws a Server Error exception of : Object reference not set to an instance of object.

Looking at the stack trace, the event occured:

AJAXEnabledWebApplication1._Default.Slider1_TextChanged(Object sender, EventArgs e)

however, why is it that the Slider1_TextChanged event fired even even after during page_load, the page was told to do a response.direct ?? shouldn't the entire page have gone through a full-page refresh life cycle ? why did it continue on to attempt to raise the Slider1_TextChanged event?

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DataSource Controls :: Simple Login Form - Object Reference Not Set To An Instance Of An Object?

Apr 20, 2010

im tryin to create a login form.

and am receiving the following error:

Object reference not set to an instance of an object

[Code]....

and heres my aspx page:

[Code]....

Stored procedure:

[Code]....

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Page.User.Identity.IsAuthenticated Returns Object Reference Not Set To Instance Of Object?

Dec 23, 2010

this works fine on my local site but as soon as i upload the site to my live server i get stem.NullReferenceException: Object reference not set to an instance of an object

on the first line of this:

if (!Page.User.Identity.IsAuthenticated)
{
pnlSignIn.Visible = true;
pnlSignOut.Visible = false;
}

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Forms Data Controls :: Shopping Cart - Object Reference Not Set To An Instance Of An Object

Sep 29, 2009

I am trying to set up a shopping cart. I'm using a gridview to display the items, a datatable to display the cart, and ajax for partial page posting.

When I try to add something to the cart from the gridview, sometimes it adds but now most of the time it gives me the error "Object Reference Not Set to an Instance of an Object".

When it does work, another issue I'm having is it is adding two for the quantity instead of one.

The full code is available at greeninkllc.com/code.txt if you view the source.

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Forms Data Controls :: Object Reference Not Set To An Instance Of An Object Repeater Control

Apr 21, 2010

can you please help me to brainstorm the possible causes of this error. I've got a paged repeater with localisation bound programitcally to an sqldatasource using a stored proc. I can post code if needs be but it's rather long. I'm looking for typical causes of this error + will make note for future reference!

erver Error in '/WebSite4' Application.

Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

[Code]....

Line 233:Line 234: Repeater1.DataSource = PagedResultsLine 235: Repeater1.DataBind()Line 236: doPaging()Line 237: End Sub

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Forms Data Controls :: Get The Value Of The Id Field In Gridview/Object Reference Not Set To An Instance Of An Object

Feb 1, 2010

I am trying to get the value of the id field in my gridview but I keep coming up with this error when i do selectedValue or selecteIndex

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

How do I get that id? What I am trying to do is when the user select that link it will delete that information from the database. Here's my code:

[Code]....

[Code]....

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Web Forms :: Error When Using A BasePage Along With A Master Page/ Object Reference Not Set To An Instance Of An Object

Mar 6, 2010

I'm new to programming in ASP.NET, but I'm making my way through Wrox's Beginning ASP.NET 3.5 in C# and VB.NET.

I'm at a section where I'm creating a BasePage. I successfully created a BasePage by creating a new class file in my App_Code folder called BasePage.cs with the following code:

[Code]....

If I run that code everything works out fine. The page loads and all is well. But, if I try to do the same thing to a page that uses my MasterPage.master file, I get the following error:

Object reference not set to an instance of an object.

Description:

An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Why is that? In the example code from the book (that also uses a MasterPage.master file), everything excutes and runs just fine. But in my test, I get the above error. I've tried comparing my pages to the books included source pages, but I can't find any differences.

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Web Forms :: Accessing Control In Usercontrol / Error: Object Reference Not Set To An Instance Of An Object

Apr 19, 2010

In the same Code behind file I have:

// This works

Label lblTopNavBarInfo = (Label)Master.FindControl("lblTopNavBarInfo");

lblTopNavBarInfo.Text = "Currently Serving: + FirstName + " " + LastName ;
// This compiles but throws an error in the browser

LinkButton lnkBtnProductsOwned = (LinkButton)LeftNav_CustServ1.FindControl("ProductsOwned"); // The Control is visible

lnkBtnProductsOwned.Enabled = false; // Error: Object reference not set to an instance of an object.

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Web Forms :: Unable To Read Web.config File/Object Reference Not Set To An Instance Of An Object

Nov 2, 2010

I have a website written in C# that was running fine on one server. We moved it to another server and have a couple issues. I am mainly a VB.NET coder but can do a few things in C#. This is not a project - it is a website and can open it in VS2008 no problem. This is an admin site for the whole website where the user can add customer comments, etc. When logging in, it works fine. I can go to one of the admin pages after logging in and works. If I go to two other different pages, I get this error:

Object reference not set to an instance of an object.

[Code]....

It turns out this is in the main.master page and it is used by the other pages that load fine. The ApplicationTitle variable is set right in the web.config file and like I said, it shows on the other pages.

My question is why would this code work fine for some pages and not two others? All of these admin pages are under a folder called Admin and the web.config file is in the root folder of the website. Its almost like these two pages cannot see the web.config file in the root folder? Why would that be if thats the case?

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State Management :: PollLockedSessionCallback Error After Migrating To 2.0/ Object Reference Not Set To An Instance Of An Object

Aug 19, 2010

We have an applicaiton that was converted to the new framework using the wizard in Visual Studio 2008. When we install the applicaiton in production and change the iis settings to use the 2.0 framework we start to see these errors in the event viewer on the web servers. We are using SQL Server Session State and have 3 web servers in a load balancer. Object reference not set to an instance of an object.</Message><StackTrace> at System.Web.SessionState.SessionStateModule.PollLockedSessionCallback...

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Auto Generated Number - System.NullReferenceException: Object Reference Not Set To An Instance Of An Object

May 14, 2009

I'm creating a form with auto generated number but when i browse the page it show the error.

System.NullReferenceException: Object reference not set to an instance of an object. dbcommand = db.GetSqlStringCommand("select max(bljobno) as bljobno from booking");

My Code here

if (!Page.IsPostBack)
{
// strSql = "select max(bljobno) from booking";
dbcommand = db.GetSqlStringCommand("select max(bljobno) as bljobno from booking");if
(db.ExecuteScalar(dbcommand).ToString().Equals(""))
number = 0;...........

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FindControl - Find A Particular Textbox In A Gridview - Error -Object Reference Not Set To An Instance Of An Object

Dec 3, 2008

This is my loop to find a particular textbox in a gridview:

dim selectedvalue as string = "hello"

For i = 0
To GridView1.Rows.CountDim tb
As TextBox =

I'm getting
Object reference not set to an instance of an object.

This error occurs on the tb.Text = selectedValue line.

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WCF / ASMX :: Server Was Unable To Process Request / Object Reference Not Set To An Instance Of An Object?

Apr 16, 2010

I have a webservice, it has few webmethods. when i create a client proxy and invoke the methods to check its response, i am getting this error. Can someone tell me what things can i check to know the cause of this? The error is not saying much hence blocked on this.

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Web Forms :: Returns Object Reference Not Set To An Instance Of The Object Because Of Empty Dataset

Aug 27, 2010

private void FillDetails(string pId, out string Name, out string Address)

[code]....

I have method called Filldetails(),This method uses stored procedure to retrieve information for product name and address based on productid passed from productdetails table.I am working on globalization project.We have this product information for US country but there is no product information for germany country.So dataset is empty for germany.As result I am getting error object reference not set to an instance of the object.

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Web Forms :: Creating A Dataset But Got An Error / Object Reference Not Set To An Instance Of An Object

Sep 22, 2009

I used code below to bind dataset to a gridview but sometime got an error:

Object reference not set to an instance of an object

How to fix it

[code]...

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Web Forms :: Error When Adding To Listbox / Object Reference Not Set To An Instance Of An Object

Feb 19, 2010

I have just recently converted my VB code to C# and now having this error when I try to add an item to my listbox, and the value is coming from the item page. I get the error at this segement:

lstboxCart.Items.Add(cartItem.Display());

My listbox is supposed to add the product's name, quantity, and price onto one row.

Here's what I have so far:

[code]...

[Code]....

[Code]....

My guess is that the source of the problem could be in the foreach loop from my cart class, shouldn't I be using that for arrays only? If I need to post any markup code or any other class, let me know.

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Receiving Object Reference Not Set To An Instance Of An Object When Binding Child DataGrid?

Mar 12, 2010

I am receiving Object reference not set to an instance of an Object when binding Child dataGrid in the ItemCommandEvent of Parent dataGrid.

[code].....

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Visual Studio :: Object Reference Not Set To An Instance Of An Object - Web Application Project

Aug 9, 2006

A little background I installed the VS 2005 Web Application Project V1.0 Release (installation was successfull) and followed Scott Guthrie's tutorial to the letter (below)

Tutorial 1: Building Your First Web Application Project
http://webproject.scottgu.com/CSharp/HelloWorld/Helloworld.aspx

However, I am getting the following error in My First Web Application Project: "Object reference not set to an instance of an object." This happens as soon as I hit the F5 key (or CTRL+F5 key).

I have checked all the references and they all seem to be OK. I double checked myproject's properties and they match the screenshots from the tutorial.I added the ASPNET and NETWORK SERVICE users with Full Permissions to the physical path for my project (D:MyDNNProjects ). This didn't work either.I also tried to un-install and re-install the Web Application Project V1.0 Release but the problem still persists.

Note: The solution builds correctly and the assembly is created in the /bin directory (MyDnnProjects.dll)

My dev environment:VS 2005 VS 2003 Windows 2003 Standard SQL Server 2005 Visual Web Developer 2005 Express Edition Visual C# 2005 Express Edition .Net Framework 1.1 and 2.0 SDK

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Forms Data Controls :: Get Error : Object Reference Not Set To An Instance Of An Object

Dec 2, 2010

I have a nested gridview

i get error:Object reference not set to an instance of an object

when i try to get the text in the footer template of the inner gridview when clicking on the linkbutton!!!

[code]....

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Crystal Reports :: Error Object Reference Not Set To An Instance Of An Object When Run The Site

May 27, 2010

I have the following code in my form load that loads the reports and assigns it to crystalreportviewer control. If Not IsPostBack Then

[Code]....

Following is the ApplyCRLogin Class

[Code]....

Now when I run the site it prompts me for the parameters and when I enter them and click on OK, I get the following error. "Object reference not set to an instance of an object." But the strange thing is if I comment the "If Not IsPostBack Then" condition, my report works fine. The problem is even when I want to go to the next page in report, the code get executed again and this takes time. Is there any other way to fix this?

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C# - Web User Control With Content Inside It / Object Reference Not Set To An Instance Of An Object

Aug 11, 2010

Usage :

[code]...

The problem is it gives me following error :

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 21: {
Line 22: base.OnInit(e);
Line 23: _ContentTemplate.InstantiateIn(BodyControlSpace);
Line 24: }
Line 25:

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Forms Data Controls :: Code Object Reference Not Set To An Instance Of An Object?

Dec 10, 2009

My Datalist gets the heading and depending upon the heading I am getting the values in my repeater this is my code Object reference not set to an instance of an object. at string day = lbl_day.Text;

[code]...

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Security :: Trying To Get The GUID After The User Has Logged In/Object Reference Not Set To An Instance Of An Object

Oct 20, 2010

What is wrong with this code? The error is Object reference not set to an instance of an object.

I have the below code in my class, then on the login page i need the GUID so i can perform a lookup in one of our custom tables. But then the error above pops up before the page even loads at the line Guid guid = (Guid)userInfo.ProviderUserKey;

[Code]....

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'Object Reference Not Set To An Instance Of An Object' Error Copying Array From Cache

Jan 21, 2009

I'm receiving a "Object Reference not set to an instance of an object" error when I try to copy some Cached data into an array.

Basically my main function checks if a certain value exists in the Cache and goes one way or the other depending on the answer:

[Code]....

The function storing those values in the Cache does something like this:

[Code]....

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