I'm sure this must be something simple that I'm missing. I'm using MVC Routing in my Forms applicaiton for Url Routing. On most of the forms I access the Context, Membership, etc. On my dev machine and on IIS6 everything works fine. I'm just trying to get to work on IIS7 and no luck. The Routing works as it should, but anytime I try...
I'm working on a large-ish web application built in C# (asp.net). I've got a simple aspx page that serves localized strings to the client browser for use in javascript controls. To get the strings, I do the following: ResourceManager _resources = new ResourceManager(_pathname, typeof(ARM).Assembly); ResourceSet rs = _resources.GetReso...
I'm trying to make it so that when you double click the tray icon, my program will either a) minimize if it is in the normal state, or b) return to normal state if it is minimized. I have the following code (where TrayIcon is a NotifyIcon control): public partial class MainForm : Form { public MainForm() { ...
I am trying to write code for an assignment for the c# intro class at my college but am ahead and am running into problems. I am getting a NullReferenceException when i run the program - i think the problem is coming from the fact that i am creating a 'Line' which contains the 'Point' class... i have tried for 3hrs to fix this - any help...
I'm getting a NullReferenceException upon trying to read an attribute of an xml-file - what attribute to read from what element is defined by user-input. The StackTrace keeps redirecting me to this line (marked) XmlDocument _XmlDoc = new XmlDocument(); _XmlDoc.Load(_WorkingDir + "Session.xml"); XmlElement _XmlRoot = _XmlDoc.DocumentEle...
I have a fairly complex WinForms app that uses data binding to tie strongly typed DataTables to controls (not sure if this fact matters here). An exception gets raised when a change to a column triggers logic that updates another column on that same row (or at least this is my theory). An example: a Customer record is bound to a Comb...
I'm having trouble getting my program to read this XML file properly, it will need to write to it also but not yet. Just note that this is only a little bit of the code XmlDocument InstalledList = new XmlDocument(); InstalledList.Load(AppsInstalledFileNamePath); //Sets the PackageNode to the correct part of the XmlDocument XmlNodeList ...
Hi, I have read a post on the Microsoft CCR forum on reducing the overhead of calls to Port.Post() [ref.: PortElement Instantiation in the CCR] and I was wondering if there is a similar way to bind a port to its receiver in order to use the port in OptimizedSingleReissueReceiver mode in an interleave arbiter? I have implemented the fol...
Hi, I have a windows application developed in VS.NET 2003. sometimes I am getting System.NullReferenceException exception from CallWindowProc(). Here is the stack trace of the exception Error_Stack_Trace : at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr...
Hi there we noticed a rather strange behavior on one of our web applications. When debugging it on a local developer workstation, everything is processed fine (using Cassini Developement Webserver). When published on a remote webserver using IIS 6.0, processing runs fine about 4 or 5 minutes, then abruptly dies. I'll explain later what...
Is there any particular reason why Regex.MatchData.group(i: Int): java.lang.String returns null rather than Option[String]? Is there a "Scala Way" to handle nulls in Scala? ...
I get this error when I invoke the Edit Action of one of my controllers. Here is the C# code of the Edit action method [AcceptVerbs(HttpVerbs.Post)] public ActionResult Edit(cedetails detailToEdit) { validateDetail(detailToEdit); if (!ModelState.IsValid) return View(); try { ...
Apparently the vast majority of errors in code are null reference exceptions. Are there any general techniques to avoid encountering null reference errors? Unless I am mistaken, I am aware that in languages such as F# is it not possible to have a null value. But thats not the question, I'm asking how to avoid null reference errors in la...
I've run into an easily solved but a design problem I've not encountered in my young life yet. I have a class that needs to go through a few setup procedures before anything else happens. However, during the construction of this class, I have in the constructor's parameters a delegate that can be passed so that the user can add their o...
So here's an excerpt from one of my classes: [ThreadStatic] readonly static private AccountManager _instance = new AccountManager(); private AccountManager() { } static public AccountManager Instance { get { return _instance; } } As you can see, it's a singleton-per-thread - i.e. the instance ...
I have a small Silverlight 3 test application. This is an exercise in learning Silverlight, XAML, binding, etc. I have a small test class (Test), which has three properties; Val1, Val2, and Sum. I have declared a resource in the XAML as follows: <UserControl.Resources> <app:Test x:Name="xamlTestObj"></app:Test> </UserControl.Reso...
I started switching some pre-existing nHibernate code in a Sharepoint-based ASP.NET project from eager loading and a new session every database hit, to lazy loading and a session for the duration of the HTTP request, and started running into a problem. When we create an Item in this system, there are some many-to-one relationships that ...
As a developer, we often encounter that exception: NullReferenceException with the well known error message: Object reference not set to an instance of an object Is it not possible for the .NET framework to return something a little bit more meaningful? Something such as: Object of type X named Y not set to an instance of...
How do I test a generic dictionary object to see whether it is empty? I want to run some code as follows: while (reportGraphs.MoveNext()) { reportGraph = (ReportGraph)reportGraphs.Current.Value; report.ContainsGraphs = true; break; } The reportGraph object is of type System.Collections.Generic.Dictionary When running this...
[SOLVED] - The mistake was mine, that I didn't link World (world_) to the entity, so that was null. Thanks for the explanation everyone! As you may know by now, I'm making a game engine/framework, and I've got stuck linking stuff with references to each other. Example: public void Attach(Entity Entity) { entity_ = Entity; en...