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• How do I decide what type of programmer I want to be?

  - by Pearsonartphoto

  I've been working at my current work for some time, and I'm considering a bit of a change of careers. I'm trying to decide what it is exactly that I want to do, and I'm really just not sure. I'm not wanting a solution for my particular case, but what I'd like to know are some generalities of things I can look for. Here are some positions that I'm considering, and what my definitions are (I'm probably calling them something other than what is standard, but hopefully this will do for now). I'm looking for quizzes, articles, explanations, or anything that can help me figure this out. Manager - Managing programmers in some sense, mostly in making sure they are kept working. Coder - A person who is told to make a program do XYZ, and makes it do that. Doesn't have to model anything, or come up with formulas. Algorithm Designer - A person who comes up with a way to make software do something, but doesn't necessarily code that program, at least, not in it's final form. QA - A person who tests code for bugs, preferably with the code in hand. Architect - This person figures out how all of the pieces fit together, is a technical manager of sorts. Maintainer - This person takes someone else's existing code, and makes sure it is fixed when issues arise. Also of some note is figuring out what industry I want to work in. Feel free to add any of your own categories.

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• In what kind of variable type is the player position stored on a MMORPG such as WoW?

  - by jokoon

  I even heard J. Carmack quickly talk about it... How a software can track a player's position so accurately, being on a such huge world, without loading between zones, and on a multiplayer scale ? How is the data formatted when it passes through the netcode ? I can understand how vertices are stored into the graphic card's memory, but when it comes to synchronize the multiplayer, I can't imagine what is best.

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• Is there a 'design pattern' type listing of common algorithms?

  - by KevinM1

  Is there a 'design pattern' styled listing of common/popular algorithms anywhere? Specifically, something that has a similar format along the lines of: Algorithm Name: e.g., Quick Sort, Bubble Sort, etc. Problem: A description of the stereotypical problem the algorithm is supposed to address Description: Description of the solution Implementation: Code examples of the solution Big O Rating: Self-explanatory Similar Algorithms: Algorithms that address the same problem in different ways, or similar problems I really like the GoF design pattern listing style, and I think it would help me learn various algorithms better/easier if I could find a resource that was similar in terms of organization.

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• How do I get started with fog type effects in a first person game?

  - by Dream Lane

  Hey guys, I'm currently using JME3 to learn 3d game development in java, and I have run into a situation. I would like to add fog effects to my games, but I don't even know where to start to implement this. I know how to set the camera's far frustum to limit the render distance, but that just simply makes a sharp cutoff. I'd like the fog it up a bit to make it feel more natural. I'm looking for an answer that points me into the correct direction. I'm not looking for specific code snippets or even JME3's engine specifics. I just want to get an idea of how this stuff works in general. Thanks!

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• HTML5 : l'API FullScreen, du pain béni pour l'hameçonnage ? Un expert imagine un type de fishing particulièrement vicieux

  L'API FullScreen, du pain béni pour l'hameçonnage ? Un expert imagine un nouveau fishing particulièrement vicieux Un petit coup de JavaScript et c'est hameçonné ! Un chercheur, professeur, web développeur, diplômé de Stanford vient de jeter un pavé dans la mare du HTML5 et de son API FullScreen. Pour lui, cet API ? et la manière dont les navigateurs réagissent au passage au mode plein écran qu'elle permet ? seraient une aubaine pour les auteurs d'attaques par fishing. Sa preuve de faisabilité (PoC) est assez simple. Mais vicieuse. Elle consiste à faire croire à l'utilisateur qu'il clique sur un lien (par exemple

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• Quickly Warning

  - by bradjones

  Every time I run my application I receive these warning errors can anyone tell me what is causing them? $ quickly run /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py:391: Warning: g_object_set_property: construct property "type" for object `Window' can't be set after construction Gtk.Window.__init__(self, type=type, **kwds) /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py:391: Warning: g_object_set_property: construct property "type" for object `AppWindow' can't be set after construction Gtk.Window.__init__(self, type=type, **kwds)

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• VS2010: “The project type is not supported by this installation.”

  - by PearlFactory

  Was working @ home and then arrived nice and early on Monday armed with all this good stuff I did on the weekend. Login,Headphones On, Check Mail and make cup of tea. Goto load up Solution I was working on the weekend@ home What the !!!... If you edit the unloaded Project you will find something like this   For some Murphys rule reason even after hitting VS2010 with SP 1 my work box has lost MVC3 so thats why {E53F8FEA-EAE0-44A6-8774-FFD645390401} is unknown  This site has a list of the VS system guids i.e C#/VB.NET,Workflow etc www.mztools.com/articles/2008/mz2008017.aspx Goto MVC 3 site www.asp.net/mvc/mvc3 and get latest ver and you should be back on track   Note to self going a bit crazy on the Visual Studio Gallery http://visualstudiogallery.msdn.microsoft.com/ and installing maybe one to many tools might have something to do with my problems...lol

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• How should I structure a site with content dependent on visitor type (not user)?

  - by Pedr

  I have a website that displays different content depending on two selections made by a visitor: Whether they are a teacher or student, and their learning level (from 4 options). Everything is public and they don't need to authenticate to access the content. Depending on their selection, different content is displayed across the whole site, other than a contact and about page. The tone of the language changes depending on whether the visitor is a student or teacher and the materials available on each page also change depending on the learning level, however in all cases, the structure of the site is identical. Currently I'm using a cookie to store the visitor's selections and render different content appropriately, so I have a single set of URLs which display different content depending on the cookie, with one of the permutations as default. I appreciate this is far from ideal, but what is the better option? Would I be better using a distinguishing segment for each selection, for example: http://example.com/teacher/lv3/resources/activities http://example.com/teacher/lv4/resources/activities http://example.com/student/lv4/resources/activities etc. What is the most sensible way to handle this situation?

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• SOLVED: The type or namespace name 'Linq' does not exist in the namespace 'System' - are you missing

  This problem has been cropping up a lot recently - projects will complain of missing namespace's when I open them up and attempt to compile the first time. If this has happened to you then read on for a simple fix. Scenario I don't know if this one is a bug in Visual Studio 2010 (Beta 2 and RC1) or something else but recently I have noticed this error cropping up more and more. When I open an existing project it might fail to compile. I have also noticed it happen when I have downloaded a fresh...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Is there a data structure for this type of list/map?

  - by Nick

  Perhaps there's a name for what I want, but I'm not aware of it. I need something similar to a LinkedHashMap in Java, but where it returns the 'previous' value if there's no value at the specified key. That is, I have a list of objects stored by an integer key (which is in units of time in my case): ; key->value 10->A 15->B 20->C So, if I were to query for a value for key 0-9, it would return null. The special part is if I queried for something 10 <= i <= 14 it would return A. Or, for i = 20, it would return C. Is there a data structure for this?

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• Does Ubuntu One offer Windows Live Sync type services?

  - by Raaaaay

  I'm an Ubuntu convert from Windows and I'm liking it very much. One of the few things I miss in Windows is their Live Sync. I don't know what it's like now or whether it still exists, but at the time (2008/2009), Windows Live Sync lets you sync folders between computers without uploading contents on their server. That is, only the metadata of the subscribed folders are uploaded (things like changelog etc.). I really liked that, and I was wondering if Ubuntu One has an option that does the same thing? At the moment it only seems to have the option to upload all file contents on the web, and I'd rather not do that. If Ubuntu One doesn't have the service similar to Windows Live Sync as described above, then I really recommend it. I would greatly appreciate it if someone can point me to the right place to make my recommendations. Thanks in advance!

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• What is a good "free-form" ("type anywhere" or canvas-like) text editor? [on hold]

  - by scorpiodawg

  My 5-1/2 y.o. son is starting to use a computer and one of the things he likes to do is to type stuff into an editor. He has used TuxPaint before and is familiar with the idea of a "canvas" for painting stuff (where painting anything anywhere on the canvas is fair game). When he opened the text editor (this was gedit on Qimo Linux), he attempted to do the same thing -- he pointed the text cursor to an arbitrary location within the editor window and expected to be able to type there (like a "text canvas", if you will). I had to explain to him that he would have to press Enter a few times to create new lines, as well as press Space a few times to create columns before he could do that. This is sub-optimal. My question: are there any free-form, canvas-like text editors that I can have him use? Almost like hex editors of yore. I am not interested in getting him to create "text areas" in a paint program.

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• Executing a web service in a CLR based Table Valued Function and representing its IEnumerable type o

  Executing a web service in a CLR based Table Valued Function resolving the problems faced during its execution and finally representing the IEnumerable output as a table in SQL Server.

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• How do i choose the type of programming? [on hold]

  - by optimist

  i have been learning c++ for a while. i had also tried java a little and i am loving it both. but i'm confused what path to choose after i finish this. i mean what are the types of programming i can try after this. because of not knowing the different streams of programming and its languages, tools, etc i'm not able to plan anything. and i don't have a cs degree. so are valid diploma courses available for the same? please help me with this. i'm not getting motivated without good idea in hand. thanks in advance :)

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• Question on PL/SQL - Evaluate the PL/SQL block given above and determine the data type and value of each of the following variables [closed]

  - by Annie

  DECLARE v_custid NUMBER(4) := 1600; v_custname VARCHAR2(300) := 'Women Sports Club'; v_ new_custid NUMBER(3) := 500; BEGIN DECLARE v_custid NUMBER(4) := 0; v_custname VARCHAR2(300) := 'Shape up Sports Club'; v_new_custid NUMBER(3) := 300; v_new_custname VARCHAR2(300) := 'Jansports Club'; BEGIN v_custid := v_new_custid; v_custname := v_custname || ' ' || v_new_custname; END; v_custid := (v_custid *12) / 10; END; /

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• [UIView didCreateWorkout:Type:Distance:Time:Message:]: unrecognized selector sent to instance.

  - by Stephen

  Hello, I'm getting the above error and have been looking at it all day, I'm getting no where fast. Anyone any ideas ? I'm new to IPhone Development. Code Below: #import "WorkoutViewController.h" #import "Workout.h" @implementation WorkoutViewController @synthesize workoutDelegate; //@synthesize Speed; //@synthesize Calories; @synthesize route; @synthesize type; @synthesize distance; @synthesize time; @synthesize message; @synthesize DBContents; @synthesize workoutArray; @synthesize managedObjectContext; //@synthesize saveWorkout; //@synthesize cancelWorkout; -(IBAction)hideKeyboard { } -(IBAction)saveWorkout { [workoutDelegate didCreateWorkout: route.text Type: type.text Distance: distance.text Time: time.text Message: message.text]; } -(IBAction)cancelWorkout { [self.workoutDelegate didCancelWorkout]; } // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. -(void)viewDidLoad { //Set images for Save & Cancel buttons. UIImage *normalImage = [[UIImage imageNamed:@"whiteButton.png"] stretchableImageWithLeftCapWidth:12.0 topCapHeight:0.0]; [saveWorkout setBackgroundImage:normalImage forState:UIControlStateNormal]; [cancelWorkout setBackgroundImage:normalImage forState:UIControlStateNormal]; UIImage *pressedImage = [[UIImage imageNamed:@"blueButton.png"] stretchableImageWithLeftCapWidth:12.0 topCapHeight:0.0]; [saveWorkout setBackgroundImage:pressedImage forState:UIControlStateHighlighted]; [cancelWorkout setBackgroundImage:pressedImage forState:UIControlStateHighlighted]; //Fetch details from the database. NSFetchRequest *request = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Workout" inManagedObjectContext:managedObjectContext]; [request setEntity:entity]; NSError *error; self.workoutArray = [[managedObjectContext executeFetchRequest:request error:&error] mutableCopy]; [request release]; //self.workoutArray = [[NSMutableArray alloc] init]; //self.DBContents.text = [self.workoutArray objectAtIndex:0]; [super viewDidLoad]; } -(void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } -(void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } -(void) didCreateWorkout:(NSString *)thisRoute Type:(NSString *)thisType Distance:(NSString *)thisDistance Time:(NSString *)thisTime Message:(NSString *)thisMessage { // Add the new workout. Workout *newWorkout = [NSEntityDescription insertNewObjectForEntityForName:@"Workout" inManagedObjectContext:self.managedObjectContext]; newWorkout.route = thisRoute; newWorkout.type = thisType; newWorkout.distance = thisDistance; newWorkout.time = thisTime; newWorkout.message = thisMessage; [self.workoutArray addObject:newWorkout]; //[self dismissModalViewControllerAnimated:YES]; } -(void)didCancelWorkout { [self dismissModalViewControllerAnimated:YES]; } -(void)dealloc { // [Speed release]; // [Calories release]; [route release]; [type release]; [distance release]; [time release]; [message release]; // [saveWorkout release]; // [cancelWorkout release]; [workoutArray release]; [managedObjectContext release]; [super dealloc]; } @end I'm trying to save details that I key on the screen (WorkoutViewController.xib) and I click the save button and get the above error. Thanks Stephen

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• input in table > td, But yet extra bottom spacing between rows! Internet Explorer

  - by phpExe

  Im using meyer css reset. But I have problem with input in a table. There in extra space between rows: <table class="table" cellpadding="0" cellspacing="0" border="0"> <tr> <td>&nbsp;</td> <td>1</td> <td>2</td> <td>3</td> <td>4</td> <td>5</td> <td>6</td> <td>7</td> <td>8</td> <td>9</td> <td>10</td> </tr> <tr> <td>1</td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text" class="black"/></td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text"/></td> </tr> <tr> <td>2</td> <td><input type="text" /></td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text"/></td> <td><input type="text" class="black"/></td> <td><input type="text"/></td> <td><input type="text"/></td> </tr> </table> and css: .table { border-collapse: collapse; border-spacing: 0px; } .table tr { margin-bottom:0; overflow:hidden; height:25px; width: 100%; padding:0; } .table input { width:25px; height:25px; border:1px solid #000; text-align:center; } .black { background:#000; } Why there is extra bottom spacing in internet explorer (I hate ie :(()? Thanks alot

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• What happens when you add/remove current site as trusted site?

  - by kasey

  What happens when you add/remove the current site, while logged on, as a trusted site? When users do this on our website, and then try to click on a link or close the browser, they get the following JavaScript exception: "Microsoft JScript runtime error: 'type' is null or not an object" in the below library code at the line "var etype = this.type = e.type.toLowerCase();" Sys.UI.DomEvent = function Sys$UI$DomEvent(eventObject) { /// <summary locid="M:J#Sys.UI.DomEvent.#ctor" /> /// <param name="eventObject"></param> /// <field name="altKey" type="Boolean" locid="F:J#Sys.UI.DomEvent.altKey"></field> /// <field name="button" type="Sys.UI.MouseButton" locid="F:J#Sys.UI.DomEvent.button"></field> /// <field name="charCode" type="Number" integer="true" locid="F:J#Sys.UI.DomEvent.charCode"></field> /// <field name="clientX" type="Number" integer="true" locid="F:J#Sys.UI.DomEvent.clientX"></field> /// <field name="clientY" type="Number" integer="true" locid="F:J#Sys.UI.DomEvent.clientY"></field> /// <field name="ctrlKey" type="Boolean" locid="F:J#Sys.UI.DomEvent.ctrlKey"></field> /// <field name="keyCode" type="Number" integer="true" locid="F:J#Sys.UI.DomEvent.keyCode"></field> /// <field name="offsetX" type="Number" integer="true" locid="F:J#Sys.UI.DomEvent.offsetX"></field> /// <field name="offsetY" type="Number" integer="true" locid="F:J#Sys.UI.DomEvent.offsetY"></field> /// <field name="screenX" type="Number" integer="true" locid="F:J#Sys.UI.DomEvent.screenX"></field> /// <field name="screenY" type="Number" integer="true" locid="F:J#Sys.UI.DomEvent.screenY"></field> /// <field name="shiftKey" type="Boolean" locid="F:J#Sys.UI.DomEvent.shiftKey"></field> /// <field name="target" locid="F:J#Sys.UI.DomEvent.target"></field> /// <field name="type" type="String" locid="F:J#Sys.UI.DomEvent.type"></field> var e = Function._validateParams(arguments, [ {name: "eventObject"} ]); if (e) throw e; var e = eventObject; var etype = this.type = e.type.toLowerCase(); this.rawEvent = e; this.altKey = e.altKey; if (typeof(e.button) !== 'undefined') { this.button = (typeof(e.which) !== 'undefined') ? e.button : (e.button === 4) ? Sys.UI.MouseButton.middleButton : (e.button === 2) ? Sys.UI.MouseButton.rightButton : Sys.UI.MouseButton.leftButton; } if (etype === 'keypress') { this.charCode = e.charCode || e.keyCode; } else if (e.keyCode && (e.keyCode === 46)) { this.keyCode = 127; } else { this.keyCode = e.keyCode; } this.clientX = e.clientX; this.clientY = e.clientY; this.ctrlKey = e.ctrlKey; this.target = e.target ? e.target : e.srcElement; if (!etype.startsWith('key')) { if ((typeof(e.offsetX) !== 'undefined') && (typeof(e.offsetY) !== 'undefined')) { this.offsetX = e.offsetX; this.offsetY = e.offsetY; } else if (this.target && (this.target.nodeType !== 3) && (typeof(e.clientX) === 'number')) { var loc = Sys.UI.DomElement.getLocation(this.target); var w = Sys.UI.DomElement._getWindow(this.target); this.offsetX = (w.pageXOffset || 0) + e.clientX - loc.x; this.offsetY = (w.pageYOffset || 0) + e.clientY - loc.y; } } this.screenX = e.screenX; this.screenY = e.screenY; this.shiftKey = e.shiftKey; } Note: the site does not require trusted privileges to function correctly.

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• Is it possible in .NET 3.5 to specify an enum type?

  - by RoboShop

  I have a enumerator which map to a bunch of int example enum MyEnum { Open = 1, Closed = 2, Exit = 4 } I find though that when I want to assign this to an integer, I have to cast it first. int myEnumNumber = **(int)** MyEnum.Open; Is it possible to specify the type of an enum so that it is implicit that there is a integer assigned to any value within the enum? That way, I do not need to keep casting it to an int if I want to use it thanks

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• XSD: xs:sequence & xs:choice combination for xs:extension elements of a common base type?

  - by bguiz

  Hi, My question is about defining an XML schema that will validate the following XML: <rules> <other>...</other> <bool>...</bool> <other>...</other> <string>...</string> <other>...</other> </rules> The order of the child nodes does not matter. The cardinality of the child nodes is 0..unbounded. All the child elements of the rules node have a common base type, rule, like so: <xs:complexType name="booleanRule"> <xs:complexContent> <xs:extension base="rule"> ... </xs:extension> </xs:complexContent> </xs:complexType> <xs:complexType name="stringFilterRule"> <xs:complexContent> <xs:extension base="filterRule"> ... </xs:extension> </xs:complexContent> </xs:complexType> My current (feeble) attempt at defining the schema for the rules node is below. However, Can I nest xs:choice within xs:sequence? If, where do I specify the maxOccurs="unbounded" attribute? Is there a better way to do this, such as an xs:sequence which specifies only the base type of its child elements? <xs:element name="rules"> <xs:complexType> <xs:sequence> <xs:choice> <xs:element name="bool" type="booleanRule" /> <xs:element name="string" type="stringRule" /> <xs:element name="other" type="someOtherRule" /> </xs:choice> </xs:sequence> </xs:complexType> </xs:element>

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• jQuery - Show field based on value of a type-hidden on refresh.

  - by Sebhael

  Hello, I'm trying to create something in jQuery and having a bit of problems with it. I'm not too adept on the framework, so I'm sure this is all wrong. Anyways, the ultimate goal is a full form that contains 3 radio buttons - depending on the value of the button, a LI is shown. I have all of that done, but my problem is coming with validation. If something fails then the page is reloaded and the div that was selected doesn't show without clicking another radio first, then back to the original. This process is basically the same as someone came up with here. Here's what I got so far. HTML <li> <label> License (radio) </label> <label for="commercial" class="checkBox"> Commercial </label> <input type="radio" name="license" value="commercial" id="commercial" class="checkBox" <?php echo set_radio('license', 'commercial'); ?> /> <label for="abandonware" class="checkBox"> Abandonware </label> <input type="radio" name="license" value="abandonware" id="abandonware" class="checkBox" <?php echo set_radio('license', 'abandonware'); ?> /> <label for="freeware" class="checkBox"> Freeware </label> <input type="radio" name="license" value="freeware" id="freeware" class="checkBox" <?php echo set_radio('license', 'freeware'); ?> /> </li> This is followed by three LI's that contain id="commercial, abandonware, and freeware" and class="licenseli" My jQuery is, as said, something from here. $('li.licenseli').hide(); $('input[name=license]:radio').change(function(){ var Type = $(this).val(); // Get value of radio $('li.licenseli').slideUp(); // Hide non-selected $('li#'+Type).slideDown(); // Show Selected }); So what I need help with is I have a hidden input that retrieves the value of the radio box from validation - I want to take this value (or the radio's if possible?) and have the original selected option's LI already visible.

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• PL/SQL 'select in' from a list of values whose type are different from the outer query

  - by Attilah

  I have the following tables : Table1 ( Col1 : varchar2, Col2 : number, Col3 : number) Table2 ( Col1 : number, Col2 : varchar2, Col3 : varchar2) I want to run a query like this : select distinct Col2 from Table1 where Col1 in ( select Col1 from Table2 ) Table1.Col1 is of type varchar2 while Table2.Col1 is of type number. so, I need to do some casting, it seems but it fails to succeed. The problem is that any attempts to run the query returns the following error : ORA-01722: invalid number 01722. 00000 - "invalid number" *Cause: *Action: Table1.Col1 contains some null values.

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• How to see if type is instance of a class in Haskell?

  - by Raekye

  I'm probably doing this completely wrong (the unhaskell way); I'm just learning so please let me know if there's a better way to approach this. Context: I'm writing a bunch of tree structures. I want to reuse my prettyprint function for binary trees. Not all trees can use the generic Node/Branch data type though; different trees need different extra data. So to reuse the prettyprint function I thought of creating a class different trees would be instances of: class GenericBinaryTree a where is_leaf :: a -> Bool left :: a -> a node :: a -> b right :: a -> a This way they only have to implement methods to retrieve the left, right, and current node value, and prettyprint doesn't need to know about the internal structure. Then I get down to here: prettyprint_helper :: GenericBinaryTree a => a -> [String] prettyprint_helper tree | is_leaf tree = [] | otherwise = ("{" ++ (show (node tree)) ++ "}") : (prettyprint_subtree (left tree) (right tree)) where prettyprint_subtree left right = ((pad "+- " "| ") (prettyprint_helper right)) ++ ((pad "`- " " ") (prettyprint_helper left)) pad first rest = zipWith (++) (first : repeat rest) And I get the Ambiguous type variable 'a0' in the constraint: (Show a0) arising from a use of 'show' error for (show (node tree)) Here's an example of the most basic tree data type and instance definition (my other trees have other fields but they're irrelevant to the generic prettyprint function) data Tree a = Branch (Tree a) a (Tree a) | Leaf instance GenericBinaryTree (Tree a) where is_leaf Leaf = True is_leaf _ = False left (Branch left node right) = left right (Branch left node right) = right node (Branch left node right) = node I could have defined node :: a -> [String] and deal with the stringification in each instance/type of tree, but this feels neater. In terms of prettyprint, I only need a string representation, but if I add other generic binary tree functions later I may want the actual values. So how can I write this to work whether the node value is an instance of Show or not? Or what other way should I be approaching this problem? In an object oriented language I could easily check whether a class implements something, or if an object has a method. I can't use something like prettyprint :: Show a => a -> String Because it's not the tree that needs to be showable, it's the value inside the tree (returned by function node) that needs to be showable. I also tried changing node to Show b => a -> b without luck (and a bunch of other type class/preconditions/whatever/I don't even know what I'm doing anymore).

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• Using IIS Application Request Routing (ARR) for ASP.NET MVC

  - by Malcolm Frexner

  I use a simple ASP.NET MVC web (the template you use when you create a new site) and the web works as expected in my live environment. I now try to use IIS Application Request Routing version 2. I have a rule that send all reuqests to a different server that match a rule. The settings are a bit like this: http://blogs.iis.net/wonyoo/archive/2008/07/09/application-request-routing-arr-as-a-reverse-proxy.aspx My rule is just a bit different it is /shop(.*). Only requests that contain shop are send to a different server. I have to use rewrite, not redirect (The same as in the Picture) This works as long as the web the original requests go to is no ASP.NET MVC web. I tried to use a plain htm file in the webfolder and it worked. If put a compiled ASP.NET application into the webfolder it worked. But as soon as I put an ASP.NET MVC web into the folder, request arr served by this application. My understanding is that the ARR should kick in before the web application gets the chance to handle the request. Did anybody use ARR sucessfully as a reverse proxy for a ASP.NET MVC web? EDIT Here is the resulting web config when the rewrite roule is entered. With this rule I get a 404 that indicates that the rule is not used. <?xml version="1.0" encoding="UTF-8"?> <configuration> <configSections> <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /> <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" /> <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /> <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /> <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /> </sectionGroup> </sectionGroup> </sectionGroup> </configSections> <appSettings /> <connectionStrings> <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient" /> </connectionStrings> <system.web> <!-- Set compilation debug="true" to insert debugging symbols into the compiled page. Because this affects performance, set this value to true only during development. --> <compilation debug="false"> <assemblies> <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /> <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add assembly="System.Web.Abstractions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add assembly="System.Web.Routing, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add assembly="System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /> <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /> <add assembly="System.Data.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /> </assemblies> </compilation> <!-- The <authentication> section enables configuration of the security authentication mode used by ASP.NET to identify an incoming user. --> <authentication mode="Forms"> <forms loginUrl="~/Account/LogOn" timeout="2880" /> </authentication> <membership> <providers> <clear /> <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" passwordFormat="Hashed" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" passwordStrengthRegularExpression="" applicationName="/" /> </providers> </membership> <profile> <providers> <clear /> <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="ApplicationServices" applicationName="/" /> </providers> </profile> <roleManager enabled="false"> <providers> <clear /> <add connectionStringName="ApplicationServices" applicationName="/" name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> <add applicationName="/" name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> </providers> </roleManager> <!-- The <customErrors> section enables configuration of what to do if/when an unhandled error occurs during the execution of a request. Specifically, it enables developers to configure html error pages to be displayed in place of a error stack trace. <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm"> <error statusCode="403" redirect="NoAccess.htm" /> <error statusCode="404" redirect="FileNotFound.htm" /> </customErrors> --> <pages> <controls> <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </controls> <namespaces> <add namespace="System.Web.Mvc" /> <add namespace="System.Web.Mvc.Ajax" /> <add namespace="System.Web.Mvc.Html" /> <add namespace="System.Web.Routing" /> <add namespace="System.Linq" /> <add namespace="System.Collections.Generic" /> </namespaces> </pages> <httpHandlers> <remove verb="*" path="*.asmx" /> <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false" /> <add verb="*" path="*.mvc" validate="false" type="System.Web.Mvc.MvcHttpHandler, System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </httpHandlers> <httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web.Routing, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </httpModules> </system.web> <system.codedom> <compilers> <compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"> <providerOption name="CompilerVersion" value="v3.5" /> <providerOption name="WarnAsError" value="false" /> </compiler> <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" warningLevel="4" type="Microsoft.VisualBasic.VBCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"> <providerOption name="CompilerVersion" value="v3.5" /> <providerOption name="OptionInfer" value="true" /> <providerOption name="WarnAsError" value="false" /> </compiler> </compilers> </system.codedom> <system.web.extensions /> <!-- The system.webServer section is required for running ASP.NET AJAX under Internet Information Services 7.0. It is not necessary for previous version of IIS. --> <system.webServer> <rewrite> <rules> <rule name="shop" stopProcessing="true"> <match url="^shop/([_0-9a-z-.]+)" /> <action type="Rewrite" url="article.aspx?title={R:1}" logRewrittenUrl="true" /> </rule> </rules> </rewrite> <validation validateIntegratedModeConfiguration="false" /> <modules runAllManagedModulesForAllRequests="true"> <remove name="ScriptModule" /> <remove name="UrlRoutingModule" /> <add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web.Routing, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </modules> <handlers> <remove name="WebServiceHandlerFactory-Integrated" /> <remove name="ScriptHandlerFactory" /> <remove name="ScriptHandlerFactoryAppServices" /> <remove name="ScriptResource" /> <remove name="MvcHttpHandler" /> <remove name="UrlRoutingHandler" /> <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add name="MvcHttpHandler" preCondition="integratedMode" verb="*" path="*.mvc" type="System.Web.Mvc.MvcHttpHandler, System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add name="UrlRoutingHandler" preCondition="integratedMode" verb="*" path="UrlRouting.axd" type="System.Web.HttpForbiddenHandler, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> </handlers> </system.webServer> </configuration>

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• The null value cannot be assigned to a member with type System.Int64 which is a non-nullable value t

  - by BritishDeveloper

  I'm getting the following error in my MVC2 app using Linq to SQL (I am new to both). I am connected to an actual SQL server not weird mdf: System.InvalidOperationException The null value cannot be assigned to a member with type System.Int64 which is a non-nullable value type My SQL table has a column called MessageID. It is BigInt type and has a primary key, NOT NULL and an IDENTITY 1 1, no Default In my dbml designer it has the following declaration for this field: [global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_MessageId", AutoSync=AutoSync.OnInsert, DbType="BigInt NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true)] public long MessageId { get { return this._MessageId; } set { if ((this._MessageId != value)) { this.OnMessageIdChanging(value); this.SendPropertyChanging(); this._MessageId = value; this.SendPropertyChanged("MessageId"); this.OnMessageIdChanged(); } } } It keeps telling me that null cannot be assigned - I'm not passing through null! It's a long - it can't even be null! Am I doing something stupid? I can't find a solution anywhere! I made this work by changing the type of this property to Nullable<long> but surely this can't be right? Update: I am using InsertOnSubmit. Simplified code: public ActionResult Create(Message message) { if (ModelState.IsValid) { var db = new MessagingDataContext(); db.Messages.InsertOnSubmit(message); db.SubmitChanges(); //line 93 (where it breaks) } } breaks on SubmitChanges() with the error at the top of this question. Update2: Stack trace: at Read_Object(ObjectMaterializer`1 ) at System.Data.Linq.SqlClient.ObjectReaderCompiler.ObjectReader`2.MoveNext() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source) at System.Data.Linq.ChangeDirector.StandardChangeDirector.DynamicInsert(TrackedObject item) at System.Data.Linq.ChangeDirector.StandardChangeDirector.Insert(TrackedObject item) at System.Data.Linq.ChangeProcessor.SubmitChanges(ConflictMode failureMode) at System.Data.Linq.DataContext.SubmitChanges(ConflictMode failureMode) at Qanda.Controllers.MessagingController.Ask(Message message) in C:\Qanda\Qanda\Controllers\MessagingController.cs:line 93 Update3: No one knows and I don't have enough clout to offer a bounty! So continued on my ASP.NET blog. Please help!

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