Web Forms :: NullReferenceException On List Add
Mar 4, 2010I am getting a NullReferenceException thrown when trying to add to theList object. Clueless at this point about how to solve.
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Web Forms :: NullReferenceException On Web User Control?
Oct 27, 2010As a test, my boss asked me to convert a (not very critical) ASP.NET site from 1.1 to 4.0. Well, it's not extremely difficult and things are going well so far. However, I've hit a small snag. I keep getting a NullReferenceException when I run this code:
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Web Forms :: Chart, RenderControl, & System.NullReferenceException?
Feb 23, 2010I need to get the html of a chart control built at runtime. When I call .RenderControl, I get System.NullReferenceException. What could the problem be? Is there another way to go about this (saving as image)? Below is my code.
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Web Forms :: Exception Details In System NullReferenceException - Object Reference Not Set
Mar 16, 2011i hav e1 drop down list where is is to filter shif code , ddl text field contaoins shift desc and value contains shift code.
when i select particular shift description it has to show all the 7 days shift description on text boxes iam using informix database
i have 1 dropdownlist which contains shiftcode & shift decription. where shift code is datavalue filed and desc is dat text field. ddl is conected to sql datasource.
i am getting this error:
Object reference not set to an instance of an object.
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Source File: C:srcAicWappPersonnelShiftTime.aspx.vb Line: 33 Stack Trace:
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here is my code..
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Web Forms :: Exception Details - System.NullReferenceException / Object Reference Not Set To An Instance
Sep 23, 2010 i have a Problem, i made a ASP.NET Page with VS2010 and now i want to run it on a iis6 (windows server 2003) and i get the message:
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The Source Code of the File is:
[Code]....
Why do this error only come on IIS6?
C# - NullReferenceException While Calling WebMethod?
Aug 24, 2010I have the following problem;My console app is running on the server and all I want to do is control it over ASP.NET Web Service.
I added new ASP.NET Web Service project to my Solution where my main console app and added reference to it.The problem is every time WebMethod calls function from console app, i get the nullreferenceexception. Even if I try to use static classes or singletons; every object is null, although my console app is running absolutely correctly.
NullReferenceException On Web User Control
Oct 28, 2010m a pretty new developer so I'm not well versed in common ASP.NET problems.As a test, my boss asked me to convert a (not very critical) ASP.NET site from 1.1 to 4.0. Well, it's not extremely difficult and things are going well so far. However, I've hit a small snag. I keep getting a NullReferenceException when I run this code
View 1 RepliesMVC :: Html.TextBox NullReferenceException
May 19, 2010When I submit invalid data to test my form validation I get a NullReferenceException on the folloing line of code in my view:
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I can't seem to find anything that's null.assessment.AssessmentDescr is populated with the expected string.assessment.Score is populated with the value 0.Any ideas as to what might be causing the NullReferenceException? Seems to me that Html.TextBox has everything it nees to render the TextBox.
C# - NullReferenceException On PreviousPage Property?
Jan 11, 2011I followed the directions from MSDN on transferring data between asp.net pages.But when using the 'PreviousPage' property to access the previous pages controls, I get a null ref exception that PreviousPage is not set to an instance of an object.Here is my code:
public partial class Portal : System.Web.UI.Page
{
public string Username
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Random NullReferenceException From MVC Internals?
Mar 9, 2010we have an MVC app that is after some time getting to some kind of bad state. I found only a couple of posts with a similar error message and they pointed to not changing up the routing table (after appstart). However this app doesn't mess with the routing table after appstart so that would appear not to be the cause of our problem. Recycling the app makes the error go away... for a time. Got 3 sites (all running of the same codebase) that this is effecting.
Just incase I'm doing something naughty in my application class heres a bit of source:
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And the class that inherits from: [Code]....
Stack trace follows:[NullReferenceException: Object reference not set to an instance of an object.]
System.Web.Routing.RouteCollection.GetVirtualPath(RequestContext requestContext, RouteValueDictionary values) +97
Security :: NullReferenceException From Login.Login1_LoggedIn?
May 14, 2010I'm trying to call a dataadapter funtion to pass browser information to a database table upon logged in. I have also tried not assigning the function to an interget by setting the fucntion to not return a value. However in either case I get the System NullReferenceException.
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C# - NullReferenceException Handling In In-line Code?
Feb 16, 2011I have some inline code in an aspx file that executes:
<dd><%= encode(Listing.Address.Line1) %> </dd>
Problem is, under certain circumstances the Listing object will be null and therefore references to properties such as Address will throw an exception. How do I handle that exception? I basically want to ignore it: catch it, and then proceed with regular execution/rendering of page.
VS 2008 Get The Following Error: System.NullReferenceException / How To Solve It
Jul 28, 2010I am having some issues accessing a literal in a usercontrol.
I get the following error: System.NullReferenceException: Object reference not set to an instance of an object. at page.sbPageLoad(String sTypeCD, Int32 iCategoryID, String SortExpression)
Does the following code below look right?
Here is my usercontrol named: topbanner.ascx:
Code:
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VS 2008 DataRow Error System.NullReferenceException?
Jul 26, 2010When I click on my btnMissionary_Click which is suppose to add a datatable row I am getting the following error:
System.NullReferenceException: Object reference not set to an instance of an object. If I add a entry right away it seems to work fine.
Here is my form
HTML Code:
<div id="container">
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MVC :: TryUpdateModel Throws NullReferenceException In 3 Unit Test
Nov 12, 2010Since I upgraded from MVC 2 to MVC 3 RC, using TryUpdateModel causes a NullReferenceException. This problem only occurs when running my action method as part of a unit test. Running it on the actual server works as expected. Here's a stack trace of the exception:
System.NullReferenceException: Object reference not set to an instance of an object. at System.Web.Mvc.JsonValueProviderFactory.GetValueProvider(ControllerContext controllerContext) at System.Web.Mvc.ValueProviderFactoryCollection.<>c_DisplayClassc.b_7(ValueProviderFactory
factory) at System.Linq.Enumerable.WhereSelectEnumerableIterator[Code]....
2.MoveNext()
at
System.Collections.Generic.List[Code]....
1
collection) at
System.Linq.Enumerable.ToList[TSource](IEnumerable`1
source) at
System.Web.Mvc.ValueProviderFactoryCollection.GetValueProvider(ControllerContext
controllerContext) at
System.Web.Mvc.Controller.TryUpdateModel[TModel](TModel
model, String prefix)
... my own code from here on....
In case it matters, my controller has the following signature:
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My guess is that this has to do with the new way DI works in MVC3, but I can't figure out what I'm doing wrong. Perhaps there is something in terms of DI setup that is required in MVC 3, but wasn't required in MVC 2?
MVC :: NullReferenceException Was Unhandled By Usercode In Application Using Linq To Sql
Feb 16, 2010I am getting an exception like"NullReferenceException was unhandled by usercode-Object reference not set to an instance of an object." in (IEnumerable)Viewdata.Model.
<% foreach (EmployeeMaster m in (IEnumerable)ViewData.Model)
MVC :: Null Action Id Returns System.NullReferenceException?
Oct 26, 2010This is what I'm trying to run:
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When I browse to www.mysite.com/mycontroller/myaction/myid, everything works ok. But visiting www.mysite.com/mycontroller/myaction produces:Server Error in '/' 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.
ServerControl Randomly Null / System.NullReferenceException?
Apr 8, 2010I got a master page with a server control in it. Randomly the server control is inaccessible from codebehind. This doesn't happen on a specific action (eg a Button click or so). Currently I have no clue what this could be. I don't think it's output caching since this is not explcitly activated and the error happens far to seldom for that. But I'm going to disable caching in the master page explicitly with next deployment.
The control is defined in markup. The accompaning codebehind is:
PGFMainNavi.HasAccessToFunction = HasAccessToNaviItem;
// HasAccessToNavi is a local function
Exception is:
System.NullReferenceException: Object reference not set to an instance of an object
C# - Adding An Item To A Dictionary Results In A NullReferenceException?
Mar 28, 2011The following code has only thrown a NullReferenceException a handful of times over the last several months, but I'm not exactly sure why. The code isn't mine, but it looks pretty straight forward to me.
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The only thing I can think of is that pageType is null when it's being used as a dictionary key, but apparently that is not possible.
The code that calls it is simple:
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
_mypage = GetPage();
}
I also thought that the error might be with the _section.Pages, but section is never null and never sets anything. If .Pages[page] returns null, the MyPage constructor simply returns. So what am I missing?
VS 2008 - Removing IE Header And Footer But Getting NullReferenceException?
Jul 9, 2012I am trying to get rid of the IE added header and footer such as Page Title, Page 1 of 1, Url, Etc..
I am using the following code. My goal is when a user click on the PRINT button within my application, I would call SetIEON, print the page and SetIEOff.
However, when my code gets to SetIEOn at
Dim oKey As RegistryKey = Registry.CurrentUser.OpenSubKey(strKey, bolWritable)
oKey.SetValue(strName, oValue)
it crashes with a NullReferenceException. I'm using VS 2008 .NET 2.0
See code below.
'Removing the header and footer in the Windows Registry
Public Sub SetIEOn()
Dim strKey As String = "SoftwareMicrosoftInternet ExplorerPageSetup"
Dim bolWritable As Boolean = True
Dim strName As String = "footer"
Dim oValue As Object = ""
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Crystal Reports :: CrystalReportViewer.ReuseParameterValuesOnRefresh Throws NullReferenceException
Feb 10, 2010I am installing a website that uses CrystalReport to display reports on a customer's server. When trying to display a report I got an error at the following line:
<CR:CrystalReportViewer runat="server" AutoDataBind="True" EnableDatabaseLogonPrompt="False" EnableParameterPrompt="False" ReuseParameterValuesOnRefresh="True" DisplayGroupTree="False" .... />Error:
[NullReferenceException: Object reference not set to an instance of an object.]
CrystalDecisions.Web.CrystalReportViewerBase.set_ReuseParameterValuesOnRefresh(Boolean value) +28
ASP.memberpages_MyPage_aspx.__BuildControlCrystalReportVPI() in d:Web_apldomainMemberPagesMyPage.aspx:10
ASP.memberpages_MyPage_aspx.__BuildControlshow_filter() in d:Web_apldomainMemberPagesMyPage.aspx:9
ASP.memberpages_MyPage_aspx.__BuildControlContent(Control __ctrl) in d:Web_apldomainMemberPagesMyPage.aspx:8
System.Web.UI.CompiledTemplateBuilder.InstantiateIn(Control container) +12
ASP.memberpages_sitetemplate_master.__BuildControlSiteTemplate_Content() in d:Web_apldomainMemberPagesSiteTemplate.master:90
ASP.memberpages_sitetemplate_master.__BuildControlSiteTemplateForm() in d:Web_apldomainMemberPagesSiteTemplate.master:39
ASP.memberpages_sitetemplate_master.__BuildControlTree(memberpages_sitetemplate_master __ctrl) in d:Web_apldomainMemberPagesSiteTemplate.master:1
ASP.memberpages_sitetemplate_master.FrameworkInitialize() in d:Web_apldomainMemberPagesSiteTemplate.master.cs:912307
System.Web.UI.UserControl.InitializeAsUserControlInternal() +31
System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection) +1978576
System.Web.UI.Page.get_Master() +48
System.Web.UI.Page.ApplyMasterPage() +18
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +543
I tried to set the same attributers programmatically in the Page_Load event:
protected void Page_PreInit(object sender, EventArgs e)
{
CrystalReportVPI.AutoDataBind = true;
CrystalReportVPI.EnableDatabaseLogonPrompt = false;
CrystalReportVPI.EnableParameterPrompt = false;
CrystalReportVPI.ReuseParameterValuesOnRefresh = true;
...
}
Here the NullReferenceException is thrown only in the »CrystalReportVPI.ReuseParameterValuesOnRefresh = true;« line. The same page runs on another customer's server with no errors. The server's environment is: Windows Server 2000 CRRedist2005_x86.msi dotnetfx.exe 2.0.50727.42 Has anyone encountered problems like this? Any idea how to solve it? I already searched for answers on different forums with no result.
Security :: FormsAuthentication.SignOut() Results In System.NullReferenceException?
Aug 26, 2010I am getting a "System.NullReferenceException" when I call
View 3 RepliesMVC :: NullReferenceException When Deploying To IIS 6 - Failed In Global.asax.cs File
Apr 9, 2010I am developing a small asp.net mvc intranet application for our company. Right now the home page will get the Windows username from the windows logged on user and make a call to our active directory based on that username to get more detailed info about the user (email, ect.) Everything works great on my local Visual Studio 2008 server. But when I deploy all the files to my IIS 6.0 server I get the following:
[NullReferenceException: Object reference not set to an instance of an object.]
STPIntranet.MvcApplication.Session_Start() in C:Documents and SettingscsallemiMy DocumentsVisual Studio 2008Projects<ProjectName>Global.asax.cs:50
[TargetInvocationException: Exception has been thrown by the target of an invocation.]
System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) +0
System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) +71
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) +350
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +29
System.Web.Util.ArglessEventHandlerProxy.Callback(Object sender, EventArgs e) +42
System.Web.SessionState.SessionStateModule.RaiseOnStart(EventArgs e) +8779824
System.Web.SessionState.SessionStateModule.CompleteAcquireState() +237
System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData) +504
System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +66
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155
It is failed in my Global.asax.cs file where I try to populate a custom User object (has a username and email property). In line 50 where the error is occuring I make a call to a class called SecurityUtil to get the username from WindowsIdentity.GetCurrent() and then get the email by making a call into our active directory. I almost want to say that the necessary libraries are not getting added in either my project dll or web.config file because of the null pointer. Also, the error line is point to my local file structure (C:Documents and SettingscsallemiMy DocumentsVisual Studio 2008Projects) and not the file structure residing on my iis 6.0 machine.
C# - ItextSharp Nested Table On Multiple Pages Causes NullReferenceException?
Feb 4, 2010I am getting a NullReferenceException when the following code is executed. I have also noticed that the nested table appeared on a new page when I added in the code that wrote cells to the main table. It doesn't occur if I take out the two loops that write cells to the main table.
<%@ Page Title="" Language="C#" MasterPageFile="~/Main.master" %>
<%@ Import Namespace="iTextSharp.text" %>
<%@ Import Namespace="iTextSharp.text.pdf" %>
<%@ Import Namespace="System.IO" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
Document doc = new Document(PageSize.LETTER);
// Here is some stuff needed to put the pdf into the users response stream
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AJAX :: NullreferenceException With Fied Webusercontrol And .aspx Page?
May 13, 2010I have written a basic ASP.NET user control. It looks like this:
<asp:ScriptManagerProxy ID="ScriptManagerProxy1" runat="server">
</asp:ScriptManagerProxy>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" >
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