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• I don't understand Application Domains

  - by Jeremy Edwards

  .NET has this concept of Application Domains which from what I understand can be used to load an assembly into memory. I've done some research on Application Domains as well as go to my local book store for some additional knowledge on this subject matter but it seems very scarce. All I know that I can do with Application Domains is to load assemblies in memory and I can unload them when I want. What are the capabilities other that I have mentioned of Application Domains? Do Threads respect Application Domains boundaries? Are there any drawbacks from loading Assemblies in different Application Domains other than the main Application Domains beyond performance of communication? Links to resources that discuss Application Domains would be nice as well. I've already checked out MSDN which doesn't have that much information about them.

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• OutOfMemoryError calling XmlSerializer.Deserialize() - not related to XML size!

  - by Mike Atlas

  This is a really crazy bug. The following is throwing an OutOfMemoryException, for XML snippits that are very short (e.g., <ABC def='123'/>) of one type, but not for others of the same size but a different type: (e.g., <ZYX qpr='baz'/>). public static T DeserializeXmlNode<T>(XmlNode node) { try { return (T)new XmlSerializer(typeof(T)) .Deserialize(new XmlNodeReader(node)); } catch (Exception ex) { throw; // just for catching a breakpoint. } } I read in this MSDN article that if I were using XmlSerializer with additional parameters in the constructor, I'd end up generating un-cached serializer assemblies every it got called, causing an Assembly Leak. But I'm not using additional parameters in the constructor. It also happens on the first call, too, so the AppDomain is fresh. Worse yet, it is only thrown in release builds, not debug builds. What gives?

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• What's wrong with my logic here?

  - by stu

  In java they say don't concatenate Strings, instead you should make a stringbuffer and keep adding to that and then when you're all done, use toString() to get a String object out of it. Here's what I don't get. They say do this for performance reasons, because concatenating strings makes lots of temporary objects. But if the goal was performance, then you'd use a language like C/C++ or assembly. The argument for using java is that it is a lot cheaper to buy a faster processor than it is to pay a senior programmer to write fast efficient code. So on the one hand, you're supposed let the hardware take care of the inefficiencies, but on the other hand, you're supposed to use stringbuffers to make java more efficient. While I see that you can do both, use java and stringbuffers, my question is where is the flaw in the logic that you either use a faster chip or you spent extra time writing more efficient software.

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• Partial Interface in C#

  - by Ngu Soon Hui

  Does C# allows partial interface? i.e., in ManagerFactory1.cs class, I have public partial interface IManagerFactory { // Get Methods ITescoManager GetTescoManager(); ITescoManager GetTescoManager(INHibernateSession session); } and in ManagerFactory.cs class, I have: public partial interface IManagerFactory { // Get Methods IEmployeeManager GetEmployeeManager(); IEmployeeManager GetEmployeeManager(INHibernateSession session); IProductManager GetProductManager(); IProductManager GetProductManager(INHibernateSession session); IStoreManager GetStoreManager(); IStoreManager GetStoreManager(INHibernateSession session); } Both ManagerFactory and ManagerFactory1 are located in the same assembly.

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• Difficulty thinking of properties for FsCheck

  - by Benjol

  I've managed to get xUnit working on my little sample assembly. Now I want to see if I can grok FsCheck too. My problem is that I'm stumped when it comes to defining test properties for my functions. Maybe I've just not got a good sample set of functions, but what would be good test properties for these functions, for example? //transforms [1;2;3;4] into [(1,2);(3,4)] pairs : 'a list -> ('a * 'a) list //' //splits list into list of lists when predicate returns // true for adjacent elements splitOn : ('a -> 'a -> bool) -> 'a list -> 'a list list //returns true if snd is bigger sndBigger : ('a * 'a) -> bool (requires comparison)

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• Is programming in PHP easy?

  - by nik

  PHP is considered as an easy language of all, Why? Being an php developer, I haven't use any other language that much. And I know with php we gotta learn so much other things also like javascript ajax xml database jquery + all the cms like joomla, drupal, phpbb etc etc. And in web worls u always had to learn injecting maps, calendars, payment gatewaysetc Do learning other languages have these much dependencies? And if php easy than isn't it good thing to have easy language. I can't imagine to built a website in assembly language(Is it possible?)

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• Splash screen moves up before closing

  - by rturney

  In C# I am having a problem with the splash screen. When it is time to close and the main Form1 appears, it moves over to the upper right corner of Form1. It then disappears. I have never had this occur before and have just about run out of ideas to fix it. I want the splash screen to disappear in the center screen and not move over to the upper corner of the opening Form1. Here is the code: public Form1() { Splash mySplash = new Splash(); mySplash.TotalValue = 7; //or however many steps you must complete mySplash.Show(); mySplash.Update(); InitializeComponent(); //--<begin>-------------- this.Hide(); this.WindowState = FormWindowState.Normal; mySplash.Progress++; printDoc.PrintPage += new PrintPageEventHandler(printDoc_PrintPage); printBOM.PrintPage += new PrintPageEventHandler(printBOM_PrintPage); printList.PrintPage += new PrintPageEventHandler(printList_PrintPage); mySplash.Progress++; // using old Kodak Imaging OCX ! axImgEdit1.Image = "\\\\Netstore\\eng_share\\EView\\BOB-eView9.tif"; axImgEdit1.DisplayScaleAlgorithm = ImgeditLibCtl.DisplayScaleConstants.wiScaleOptimize; axImgEdit1.FitTo(0); axImgEdit1.Display(); mySplash.Progress++; //~~~~~~~~~~~~~~~~~~~~Getting printer info~~~~~~~~~~~~~~~~~~~~~~~~~ List<Win32_Printer> printerList = Win32_Printer.GetList(); int i = 0; foreach (Win32_Printer printer in printerList) { prnName = printer.Name; prnPort = printer.PortName; prnDriver = printer.DriverName; if (i == 0) { prnNameString = prnName; prnDriverString = prnDriver; prnPortString = prnPort; } else { prnNameString += "," + prnName; prnDriverString += "," + prnDriver; prnPortString += "," + prnPort; } i++; } mySplash.Progress++; EViewMethods.defaultPrn[0] = Settings.Default.DefaultPrinter; //defaultPrn[] is string array holding the default printer name, driver and port EViewMethods.defaultPrn[1] = Settings.Default.DefaultPrinterDriver; EViewMethods.defaultPrn[2] = Settings.Default.DefaultPrinterPort; //making this printer the system default printer object printerName = Settings.Default.DefaultPrinter; ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_Printer"); ManagementObjectCollection collection = searcher.Get(); foreach (ManagementObject currentObject in collection) { if (currentObject["name"].ToString() == printerName.ToString()) { currentObject.InvokeMethod("SetDefaultPrinter", new object[] { printerName }); } } mySplash.Progress++; EViewMethods.reCenterEVafterDwgClose = Settings.Default.ReCenterEVafterDwgClose; if (Settings.Default.ReCenterEVafterDwgClose == true) recenterEViewAfterDrawingViewerClosesToolStripMenuItem.Checked = true; else recenterEViewAfterDrawingViewerClosesToolStripMenuItem.Checked = false; //------------------------------------------------------- EViewMethods.screenBehavior = Settings.Default.ViewStyle; normalToolStripMenuItem.Checked = false; clearViewToolStripMenuItem.Checked = false; clearviewDULevLRToolStripMenuItem.Checked = false; clearviewdULevLLToolStripMenuItem.Checked = false; clearviewdURevULToolStripMenuItem.Checked = false; clearviewdURevLLToolStripMenuItem.Checked = false; clearviewdURevLRToolStripMenuItem.Checked = false; smallScreenToolStripMenuItem.Checked = false; //Form1.ActiveForm.SetDesktopLocation(588, 312); //all screen behavior mode will begin centered on the screen EViewMethods.eviewUserPrefLocation = Settings.Default.FormEviewLocation; //------------------------------------------------------- EViewMethods.syncListToDwgNum = Settings.Default.SyncListDwgNum; if (EViewMethods.syncListToDwgNum == true) synchronizeListToActiveDwgToolStripMenuItem.Checked = true; else synchronizeListToActiveDwgToolStripMenuItem.Checked = false; toolStripStatusLabel1.Text = ""; toolStripStatusLabel2.Text = Settings.Default.ViewStyle; toolStripStatusLabel3.Text = Settings.Default.DefaultPrinter; //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Assembly asm = Assembly.GetExecutingAssembly(); AssemblyName asmName = asm.GetName(); EViewMethods.eviewVersion = asmName.Version.ToString(); radioPartInfo.Checked = true; disableAllSearch(); EViewMethods.userName = Environment.UserName; EViewMethods.openConnection(); mySplash.Progress++; EViewMethods.loadFavorites(listFavorites); mySplash.Close(); mySplash.Dispose(); this.Show(); this.ActiveControl = comboEntry; }

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• Use DLL and have it be as trusted as my own application is

  - by Binary255

  Hi, I am using a port of GNU GetOpts, to be specific I am using the one at: http://getopt.codeplex.com I have added the DLL as a reference. But when I run my application I receive an exception: System.IO.FileLoadException was unhandled Message="Could not load file or assembly 'Gnu.Getopt, Version=0.9.1.24287, Culture=neutral, PublicKeyToken=d014b4ccdc53511a' or one of its dependencies. Failed to grant permission to execute. (Exception from HRESULT: 0x80131418)" If it is possible I would like my application to say, "trust this DLL as much as you trust me". Is there a way to do that so I won't have to fiddle with security settings? And if there is not. What is the cleanest way to get the DLL working?

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• Use the [Serializable] attribute or subclassing from MarshalByRefObject?

  - by Theo Lenndorff

  I'd like to use an object across AppDomains. For this I can use the [Serializeable] attribute: [Serializable] class MyClass { public string GetSomeString() { return "someString" } } Or subclass from MarshalByRefObject: class MyClass: MarshalByRefObject { public string GetSomeString() { return "someString" } } In both cases I can use the class like this: AppDomain appDomain = AppDomain.CreateDomain("AppDomain"); MyClass myObject = (MyClass)appDomain.CreateInstanceAndUnwrap( typeof(MyClass).Assembly.FullName, typeof(MyClass).FullName); Console.WriteLine(myObject.GetSomeString()); Why do both approaches seem to have the same effect? What is the difference in both approaches? When should I favor the one approach over the other? EDIT: At the surface I know that there are differences between both mechanisms, but if someone jumped out of a bush and asked me the question I couldn't give him a proper answer. The questions are quite open questions. I hoped that someone can explain it better than I could do.

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• Question about rights for svn

  - by diadiora

  I have a web application written in asp.net mvc. I have in MyApp.Web assembly the list of views and and the content files(images, scripts, css, and so on). In MyApp.WebBase I have the rest of fonctionality(Controllers, domain(entities, repositories, services)). Now the question is the following: I want to give to third party html coder access only to MyApp.Web source code in order he to be able to compile the application locally and see the results. By other hand the developer team shoul have access to full source code. The problem is that in order the html coder to be able to compile the application locally he need in his project the references to the MyApp.WebBase.dll Can anyone help me? Thanks.

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• Attempt to use DLL results in error.

  - by abhi

  I am using a library (DLL) that uses the Oracle.DataAccess DLL to connect to the database. I am doing in in C# .NET framework 3.5 When I attempt to compile, the compilation takes place, but the executable throws this error message. Could not load file or assembly 'Oracle.DataAccess, Version=2.111.7.20, Culture= neutral, PublicKeyToken=89b483f429c47342' or one of its dependencies. An attempt was made to load a program with an incorrect format. Is there some way to get around this? What could be causing this to happen?

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• C#, weird optimization

  - by Snake

  Hi, I'm trying to read my compiled C# code. this is my code: using(OleDbCommand insertCommand = new OleDbCommand("...", connection)) { // do super stuff } But! We all know that a using gets translated to this: { OleDbCommand insertCommand = new OleDbCommand("...", connection) try { //do super stuff } finally { if(insertCommand != null) ((IDisposable)insertCommand).Dispose(); } } (since OleDbCommand is a reference type). But when I decompile my assembly (compiled with .NET 2.0) I get this in Resharper: try { insertCommand = new OleDbCommand("", connection); Label_0017: try { //do super stuff } finally { Label_0111: if ((insertCommand == null) != null) { goto Label_0122; } insertCommand.Dispose(); Label_0122:; } I'm talking about this line: if ((insertCommand == null) != null). True is not null, it never is, nor is false. So how is my object disposed properly? WTF? Thanks! -Kristof

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• Why can one aliased C# Type not be accessed by another?

  - by jdk

  good stuff // ok to alias a List Type using AliasStringList = System.Collections.Generic.List<string>; // and ok to alias a List of Lists like this using AliasListOfStringList1 = System.Collections.Generic.List<System.Collections.Generic.List<string>>; bad stuff // However **error** to alias another alias using AliasListOfStringList2 = System.Collections.Generic.List<AliasStringList>; Produces the compile error The type or namespace name 'AliasStringList' could not be found (are you missing a using directive or an assembly reference?) Note: this is the using directive not the using statement.

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• Windsor Container: How to specify a public property should not be filled by the container?

  - by George Mauer

  When Instantiating a class, Windsor by default treats all public properties of the class as optional dependencies and tries to satisfy them. In my case, this creates a rather complicated circular dependency which causes my application to hang. How can I explicitly tell Castle Windsor that it should not be trying to satisfy a public property? I assume there must be an attribute to that extent. I can't find it however so please let me know the appropriate namespace/assembly. If there is any way to do this without attributes (such as Xml Configuration or configuration via code) that would be preferable since the specific library where this is happening has to date not needed a dependency on castle.

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• Does NInject work in medium trust hosting?

  - by Gabriel

  I'm doing shared hosting with GoDaddy and I developed a sample ASP.NET MVC app using Castle Windsor and unfortunately, it didn't work in a medium trust setting. Specifically, I got this error: "[SecurityException: That assembly does not allow partially trusted callers"... etc. GoDaddy is sadly not flexible in their trust policy. I'm not tied to Windsor and would like to try another one that will work under Medium Trust. I'd actually like to use NInject, but I've read people having mixed success. The only one I've read that works with no problem is Microsoft's Unity. My question is, does NInject work in medium trust? If not, what are my options?

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• How to use MOV instruction in ARM with an immediate number as the second operand

  - by Summer_More_More_Tea

  Hi everyone: I just begin to study ARM assembly language, and am not clear about how to use MOV to transfer an immediate number into a register. From both the ARM reference manual and my textbook, it's said that range of immediate number following MOV instruction is 0-255. But when I test on my own PC in ADS 1.2 IDE, instruction MOV R2, #0xFFFFFFFF performs well. Isn't number 0xFFFFFFFF out of range according to the specification? Hope someone can give me a hand. Regards.

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• Compiling Allegro source code (C#)

  - by 7331

  I am trying to build a C# project (downloaded code) in Visual Studio Express 2008. I get the error (my translation): The type or namespace name "Allegro" couldn't be found. for the line using Allegro; I know the 2D graphics library Allegro, of course, but I can't find much information on how to use it in C#. It is being used for visualization in the project I am trying to compile. I also get the warning This reference couldn't be resolved. The Universal assembly couldn't be found. I haven't been working with C# before and and I barely know Visual Studio Express. These are newbie mistakes - but I just need a fast solution for this problem. Could someone provide me with a short step-by-step solution?

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• Default Accessor Needed: Custom ConfigurationSection

  - by Mark

  I am totally confused by a simple Microsoft error message. When I run XSD.exe against an assembly that contains a custom ConfigurationSection (which in turn utilizes a custom ConfigurationElement and a custom ConfigurationElementCollection, as well as several ConfigurationProperties), I get the following error message: Error: There was an error processing 'Olbert.Entity.Utils.dll'. There was an error reflecting type 'Olbert.Entity.DatabaseConnection'. You must implement a default accessor on System.Configuration.ConfigurationLockCollection because it inherits from ICollection. Yet the class in question has a default accessor: public object this[int idx] { get { return null; } set { } } I realize the above doesn't do anything, but I don't need to access the element's properties by index. I'm just trying to work around the error message. So what's going on?

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• Using Thrift to connect to Cassandra from .NET

  - by vtortola

  Hi, I'm interested in Cassandra and I'd like to test it at home in my Windows XP computer. I've found instructions for install an run Cassandra in Windows, and it's already up and running; I've also found the thrift executable for Windows and generate the C# interfaces, but... when I try to compile that generated code in Visual Studio I got : "The type or namespace name 'Thrift' could not be found (are you missing a using directive or an assembly reference?)", so I'm missing something else, but I cannot find what... What is it? Is it a dll? I've looked in the thrift code and I cannot find anything related to .net , so what am I missing? Thanks in advance. Regards.

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• Using the "naked" attribute for functions in GCC

  - by Art Spasky

  GCC documentation (http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html) states in 6.29 Declaring Attributes of Functions "naked Use this attribute on the ARM, AVR, IP2K, RX and SPU ports to indicate that the specified function does not need prologue/epilogue sequences generated by the compiler. It is up to the programmer to provide these sequences. The only statements that can be safely included in naked functions are asm statements that do not have operands. All other statements, including declarations of local variables, if statements, and so forth, should be avoided. Naked functions should be used to implement the body of an assembly function, while allowing the compiler to construct the requisite function declaration for the assembler." Can I safely call functions using C syntax from naked functions, or only by using asm?

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• The type or namespace name 'Oledb' does not exist in the namespace 'System.Data' error on Web Servic

  - by Pankaj Kumar

  Hi everyone... i have a webservice that i want to test by typing the url in the address bar in the web browser localhost:1981/myProject/admin/autocomplete.asmx and when i do this it gives this compilation error CS0234: The type or namespace name 'Oledb' does not exist in the namespace 'System.Data' (are you missing an assembly reference?) i know this is because we added this in our web.config <add namespace="System.Data.Oledb"/> <add namespace ="System.Data"/> in the namespaces section..... when i call this web service through ajax it works but if i try to test it it gives this error. Is there any way to prevent this?

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• How do I work with WIndows Forms in WPF?

  - by xarzu

  How do I work with WIndows Forms in WPF? In my WPF program I created a Windows Form class. In this Form, I placed an OK button and I went into the properties of the button and set the DialogResult to OK. Now, I am calling this Dialog (Window Form) from the MainWindow.xaml.cs: dres = form.ShowDialog(); if (dres != DialogResult.OK) return; The compiler is complaining: Error 3 'System.Nullable<bool>' does not contain a definition for 'OK' and no extension method 'OK' accepting a first argument of type 'System.Nullable<bool>' could be found (are you missing a using directive or an assembly reference?)

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• Can I mark an Email as "High Importance" for Outlook using System.Net.Mail?

  - by ccornet

  Part of the application I'm working on for my client involves sending emails for events. Sometimes these are highly important. My client, and most of my client's clients, use Outlook, which has the ability to mark a mail message as High Importance. Now, I know it is callous to assume that all end users will be using the same interface, sp I am not. But considering you can send email from Outlook as High Importance even if the target is not necessarily reading through Outlook, that means that there is basically some data stored... somehow... that lets Outlook know if a particular message was assigned as High Importance. That's my interpretation, at least. The application currently uses System.Net.Mail to send out emails, using System.Net.Mail.MailMessages for writing them and System.Net.Mail.SmtpClient to send them. Is it possible to set this "High Importance" setting with System.Net.Mail's abilities? If not, is there any assembly available which can configure this setting?

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• ASP.NET MVC - separating large app

  - by marc_s

  I've been puzzled by what I consider a contradiction in terms: ASP.NET MVC claims to be furthering and supporting the "separation of concern" motto, which I find a great idea. However, it seems there's no way of separating out controllers, model or views into their own assembly, or separating areas into assemblies. With the fixed Controller, Model and View folders in your ASP.NET MVC, you're actually creating a huge hodge podge of things. Is that the separation of concerns, really?? Seems like quite the contrary to me. So what I'm wondering: how can I create an ASP.NET MVC solution that will either separate out controllers, the model, and the folders full of views, into separate assemblies? how can I put areas of ASP.NET MVC 2 into separate assemblies? or how else do you manage a large ASP.NET MVC app - which has several dozen or even over a hundred controllers, lots of model and viewmodel classes, and several hundred views?

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• How can I build against Microsoft.Web.Administration (IIS 7.x) on a Windows 2003 build machine?

  - by JohnL

  Hi, I am writing a C# config app for (amongst other things) setting up websites. It's only required to support IIS 7.x (Windows 2008 / 2008 R2), and requiring the compatibility pack is a no-no, so I figured I'd just use the Microsoft.Web.Administration namespace. However, the only place I can find the assembly that contains this namespace (Microsoft.Web.Administration.dll) is from the IIS 7.x installation folder, and our main build machines are Windows 2003 and so cannot install IIS 7.x. One option is to mandate a 2008 build machine but we currently only have one so that's not ideal. We've already ruled out appcmd.exe. The other option is to make a package consisting of the dlls necessary to build against Microsoft.Web.Administration.dll. Has anyone tried that? Is there such a package already in existence, hidden somewhere on the MS download site? Thanks in advance.

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