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  • "The calling thread cannot access this object because a different thread owns it." While using Dispa

    - by Sdry
    I have an application, that I want to load additional xaml files, being resourcedictionaries controling the style of the application. Yet when trying to add a loaded ResourceDictionary to the mergeddictionaries I get an InvalidOperationException saying "The calling thread cannot access this object because a different thread owns it." at a point where I am not even using multiple threads. The application contains a usercontrol which loads the xaml file through a background worker, adding the loaded ResourceDictionaries to an Observablecollection. When I pass on a selected theme(=ResourceDictionary) to a function in the mainwindow of the application, it goes wrong. public void LoadTheme(Theme theme) {//sdry 2010-4-22 if(theme !=null){ this._dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() => { MessageBox.Show("SKIN TEST: " + theme.Name); //> oke #if (SHOWDEBUGINFO) _selectedTheme = theme.Name; //>oke #endif Application.Current.Resources.MergedDictionaries.Clear(); //>oke Application.Current.Resources.MergedDictionaries.Add(theme.ResourceDictionary); //> InvalidOperationException //the theme object has a property named ResourceDictionary of type ResourceDictionary containing the loaded xaml })); } } My first reaction was to use the Disatcher.Invoke, even not knowing how I would not be on the gui thread, which doesn't solve a thing. So maybe my loaded theme belongs to a different thread ? but its originating from a property of a usercontrol, which should be the same thread. And its accesable untill trying to use the ResourceDictionary. This makes me confused, and not very aware of how to proceed, any help is appreciated.

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  • IOException reading from HttpWebResponse response stream over SSL

    - by Lawrence Johnston
    I get the following exception when attempting to read the response from my HttpWebRequest: System.IO.IOException: Received an unexpected EOF or 0 bytes from the transport stream. at System.Net.ConnectStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.IO.StreamReader.ReadBuffer() at System.IO.StreamReader.ReadToEnd() ... My code functions without issue when using http. I am talking to a third-party device; I do not have access to the server code. My code is as follows: private string MakeRequest() { // Disable SSL certificate verification per // http://www.thejoyofcode.com/WCF_Could_not_establish_trust_relationship_for_the_SSL_TLS_secure_channel_with_authority.aspx ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(delegate { return true; }); Uri uri = new Uri("https://mydevice/mypath"); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri); request.Method = WebRequestMethods.Http.Get; using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) { using (Stream responseStream = response.GetResponseStream()) { using (StreamReader sr = new StreamReader(responseStream.)) { return sr.ReadToEnd(); } } } } Does anybody have any thoughts about what might be causing it?

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  • Add new item to UITableView and Core Data as data source?

    - by David.Chu.ca
    I have trouble to add new item to my table view with core data. Here is the brief logic in my codes. In my ViewController class, I have a button to trigle the edit mode: - (void) toggleEditing { UITableView *tv = (UITableView *)self.view; if (isEdit) // class level flag for editing { self.newEntity = [NSEntityDescription insertNewObjectForEntityName:@"entity1" inManagedObjectContext:managedObjectContext]; NSArray *insertIndexPaths = [NSArray arrayWithObjects: [NSInextPath indexPathForRow:0 inSection:0], nil]; // empty at beginning so hard code numbers here. [tv insertRowsAtIndexPaths:insertIndexPaths withRowAnimation:UITableViewRowAnimationFade]; [self.tableView setEditing:YES animated:YES]; // enable editing mode } else { ...} } In this block of codes, I added a new item to my current managed object context first, and then I added a new row to my tv. I think that both the number of objects in my data source or context and the number of rows in my table view should be 1. However, I got an exception in the event of tabView:numberOfRowsInSection: Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (0) must be equal to the number of rows contained in that section before the update (0), plus or minus the number of rows inserted or deleted from that section (1 inserted, 0 deleted). The exception was raised right after the delegate event: - (NSInteger) tableView:(UITableView *) tableView numberOfRawsInSection:(NSInteger) section { // fetchedResultsController is class member var NSFetchedResultsController id <NSFechedResultsSectionInfo> sectionInfo = [[fetchedResultsController sections] objectAtIndex: section]; NSInteger rows = [sectionInfo numberOfObjects]; return rows; } In debug mode, I found that the rows was still 0 and the event invoked after the the even of toggleEditing. It looks like that sectionInfo obtained from fetchedResultsController did not include the new entity object inserted. Not sure if I miss anything or steps? I am not sure how it works: to get the fetcedResultsController notified or reflect the change when a new entity is inserted into the current managed object context?

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  • How to choose between protobuf-csharp-port and protobuf-net

    - by PierrOz
    Hi Folks, I've recently had to look for a C# porting of the Protocole Buffer library originally developped by Google. And guess what, I found two projects owned both by two very well known persons here: protobuf-csharp-port, written by Jon Skeet and protobuf-net, written by Mark Gravell. My question is simple: which one do I have to choose ? I quite like Mark's solution as it seems to me closer to C# philisophy (for instance, you can just add attributes to the properties of existing class) and it looks like it can support .NET built-in types such as System.Guid. I am sure both of them are really great projects but what's your oppinion?

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  • Jquery – Disable/unbind click on active items, rebind click when inactive

    - by j-man86
    I have a left-positioned navigation that shows/hides content on the right. Currently, when you click a link, it fades in the corresponding content on the right and adds an active class to that link. My problem is that if you click the active link again, the content on the right keeps on fading in again. I would like to unbind that click while the link is active, and if you click on another navigation link (subsequently removing the class from the previous link and adding it to the current one) rebind the click event to all inactive links. Here is my current code: $('.mixesSidebar ul li').click( function() { //Get the attribute id var liId = $(this).attr('id'); //removeClass active from all li's, addClass active to this $('.mixesSidebar ul li').removeClass('active'); $(this).addClass('active'); //Hide all content on the right $('.mixesContent ul').hide(); //Find the content with the same class as the clicked li's ID, and fadeIn $('.mixesContent').find('.' + liId).fadeIn('slow'); }); Thanks so much for your help!

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  • asp.net:Invalid temp directory in chart handler configuration [c:\TempImageFiles\].

    - by veda
    I am getting this error Invalid temp directory in chart handler configuration [c:\TempImageFiles\]. While running my code. Intially I was getting No http handler was found for request type ‘GET’ error which I solved it by referring no http handler But now I am getting the above error The details of the error are 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.IO.DirectoryNotFoundException: Invalid temp directory in chart handler configuration [c:\TempImageFiles\]. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. The stackTrace of this error [DirectoryNotFoundException: Invalid temp directory in chart handler configuration [c:\TempImageFiles\].] System.Web.UI.DataVisualization.Charting.ChartHttpHandlerSettings.Inspect() +851 System.Web.UI.DataVisualization.Charting.ChartHttpHandlerSettings.ParseParams(String parameters) +1759 System.Web.UI.DataVisualization.Charting.ChartHttpHandlerSettings..ctor(String parameters) +619 System.Web.UI.DataVisualization.Charting.ChartHttpHandler.InitializeParameters() +237 System.Web.UI.DataVisualization.Charting.ChartHttpHandler.EnsureInitialized(Boolean hardCheck) +208 System.Web.UI.DataVisualization.Charting.ChartHttpHandler.EnsureInstalled() +33 System.Web.UI.DataVisualization.Charting.Chart.GetImageStorageMode() +57 System.Web.UI.DataVisualization.Charting.Chart.Render(HtmlTextWriter writer) +257 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +144 System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +583 System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +91 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +410 System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +118 System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +489 System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +84 System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +713 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +144 System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +583 System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +91 System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +91 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +410 System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +118 System.Web.UI.Control.Render(HtmlTextWriter writer) +60 System.Web.UI.Page.Render(HtmlTextWriter writer) +66 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +144 System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +583 System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +91 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +7761 Can anyone tell me how to solve this problem... Should i have to create a temporary directory manually or what should i do...

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  • How do I style buttons in a LinearLayout like a ListView

    - by Mannaz
    I have a vertically orientated LinearLayout with some Buttons in it: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <Button android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/bt1" android:text="Button 1"></Button> <Button android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/bt2" android:text="Button 2"></Button> <Button android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/bt3" android:text="Button 3"></Button> <Button android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/bt4" android:text="Button 4"></Button> </LinearLayout> and I want this "List" of buttons to inherit the current style for ListView items. This is my current status of the stylesheet. The CKButton style gets applied over the Activity Theme. <style name="CKButton" parent="android:style/Widget.Button"> <item name="android:textSize">21sp</item> <item name="android:layout_margin">0dip</item> <!--<item name="android:background">@drawable/button_background</item>--> <item name="android:textColor">@color/button_text_normal</item> <item name="android:padding">10dip</item> <item name="android:gravity">left|center_horizontal</item> </style> As you see I tried to draw the button background myself, but depending on the system default theme the background-color changes and therefore defining a static color is not an option. Is there a way to inherit the default ListView Row background within that buttons?

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  • How do I prevent flickering on CListCtrl?

    - by Sorin Sbarnea
    I'm using a CListCtrl/CListView report view (LVS_REPORT) in virtual mode (LVS_OWNERDATA) with LVS_EX_DOUBLEBUFFER enabled and I encounter ugly flickering. Double buffer have a real effect but it doesn't stop all flickering (without it very slow). I'm not looking for switching to other controls that would require a high amount of rework (like ObjectListView) How does the flickering behaves: * on column resize - the background is first clean using lightgray and after this is displayed the text (background is white) * on mouse scroll (animated) - for a very short time there is lightgray-bar displayed in the area where new lines are to be displayed. It looks like it does clean the background using the default window background color (lightgray) for the area where it has to redraw. How do I solve the flickering problem?

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  • Why am I getting: InvalidOperationException: Failed to map the path '/app42/App_Code/'.

    - by serialhobbyist
    I've been working on a little Silverlight utility which calls a Silverlight web service. It works from my dev machine (XPsp2). I've tried publishing it to a 2008 R2 IIS 7.5 server and it doesn't work when trying to contact the web service. So I've tried using the WcfTestClient to connect to the web service. That gave an error. So I turned off CustomErrors and used IE and I get the following. Any idea why? There's no App_Code folder in the app. Failed to map the path '/app42/App_Code/'. 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.InvalidOperationException: Failed to map the path '/app42/App_Code/'. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [InvalidOperationException: Failed to map the path '/app42/App_Code/'.] System.Web.Configuration.ProcessHostConfigUtils.MapPathActual(String siteName, VirtualPath path) +320 System.Web.Configuration.ProcessHostServerConfig.System.Web.Configuration.IServerConfig.MapPath(IApplicationHost appHost, VirtualPath path) +34 System.Web.Hosting.MapPathBasedVirtualPathEnumerator..ctor(VirtualPath virtualPath, RequestedEntryType requestedEntryType) +169 System.Web.Hosting.MapPathBasedVirtualPathCollection.System.Collections.IEnumerable.GetEnumerator() +43 System.Web.Compilation.CodeDirectoryCompiler.ProcessDirectoryRecursive(VirtualDirectory vdir, Boolean topLevel) +147 System.Web.Compilation.CodeDirectoryCompiler.GetCodeDirectoryAssembly(VirtualPath virtualDir, CodeDirectoryType dirType, String assemblyName, StringSet excludedSubdirectories, Boolean isDirectoryAllowed) +11196502 System.Web.Compilation.BuildManager.CompileCodeDirectory(VirtualPath virtualDir, CodeDirectoryType dirType, String assemblyName, StringSet excludedSubdirectories) +185 System.Web.Compilation.BuildManager.CompileCodeDirectories() +654 System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +658 [HttpException (0x80004005): Failed to map the path '/app42/App_Code/'.] System.Web.Compilation.BuildManager.ReportTopLevelCompilationException() +76 System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() +1012 System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters) +1025 [HttpException (0x80004005): Failed to map the path '/app42/App_Code/'.] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +11301302 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +88 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +4338644 Version Information: Microsoft .NET Framework Version:2.0.50727.4927; ASP.NET Version:2.0.50727.4927

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  • Need help with fixing Genetic Algorithm that's not evolving correctly

    - by EnderMB
    I am working on a maze solving application that uses a Genetic Algorithm to evolve a set of genes (within Individuals) to evolve a Population of Individuals that power an Agent through a maze. The majority of the code used appears to be working fine but when the code runs it's not selecting the best Individual's to be in the new Population correctly. When I run the application it outputs the following: Total Fitness: 380.0 - Best Fitness: 11.0 Total Fitness: 406.0 - Best Fitness: 15.0 Total Fitness: 344.0 - Best Fitness: 12.0 Total Fitness: 373.0 - Best Fitness: 11.0 Total Fitness: 415.0 - Best Fitness: 12.0 Total Fitness: 359.0 - Best Fitness: 11.0 Total Fitness: 436.0 - Best Fitness: 13.0 Total Fitness: 390.0 - Best Fitness: 12.0 Total Fitness: 379.0 - Best Fitness: 15.0 Total Fitness: 370.0 - Best Fitness: 11.0 Total Fitness: 361.0 - Best Fitness: 11.0 Total Fitness: 413.0 - Best Fitness: 16.0 As you can clearly see the fitnesses are not improving and neither are the best fitnesses. The main code responsible for this problem is here, and I believe the problem to be within the main method, most likely where the selection methods are called: package GeneticAlgorithm; import GeneticAlgorithm.Individual.Action; import Robot.Robot.Direction; import Maze.Maze; import Robot.Robot; import java.util.ArrayList; import java.util.Random; public class RunGA { protected static ArrayList tmp1, tmp2 = new ArrayList(); // Implementation of Elitism protected static int ELITISM_K = 5; // Population size protected static int POPULATION_SIZE = 50 + ELITISM_K; // Max number of Iterations protected static int MAX_ITERATIONS = 200; // Probability of Mutation protected static double MUTATION_PROB = 0.05; // Probability of Crossover protected static double CROSSOVER_PROB = 0.7; // Instantiate Random object private static Random rand = new Random(); // Instantiate Population of Individuals private Individual[] startPopulation; // Total Fitness of Population private double totalFitness; Robot robot = new Robot(); Maze maze; public void setElitism(int result) { ELITISM_K = result; } public void setPopSize(int result) { POPULATION_SIZE = result + ELITISM_K; } public void setMaxIt(int result) { MAX_ITERATIONS = result; } public void setMutProb(double result) { MUTATION_PROB = result; } public void setCrossoverProb(double result) { CROSSOVER_PROB = result; } /** * Constructor for Population */ public RunGA(Maze maze) { // Create a population of population plus elitism startPopulation = new Individual[POPULATION_SIZE]; // For every individual in population fill with x genes from 0 to 1 for (int i = 0; i < POPULATION_SIZE; i++) { startPopulation[i] = new Individual(); startPopulation[i].randGenes(); } // Evaluate the current population's fitness this.evaluate(maze, startPopulation); } /** * Set Population * @param newPop */ public void setPopulation(Individual[] newPop) { System.arraycopy(newPop, 0, this.startPopulation, 0, POPULATION_SIZE); } /** * Get Population * @return */ public Individual[] getPopulation() { return this.startPopulation; } /** * Evaluate fitness * @return */ public double evaluate(Maze maze, Individual[] newPop) { this.totalFitness = 0.0; ArrayList<Double> fitnesses = new ArrayList<Double>(); for (int i = 0; i < POPULATION_SIZE; i++) { maze = new Maze(8, 8); maze.fillMaze(); fitnesses.add(startPopulation[i].evaluate(maze, newPop)); //this.totalFitness += startPopulation[i].evaluate(maze, newPop); } //totalFitness = (Math.round(totalFitness / POPULATION_SIZE)); StringBuilder sb = new StringBuilder(); for(Double tmp : fitnesses) { sb.append(tmp + ", "); totalFitness += tmp; } // Progress of each Individual //System.out.println(sb.toString()); return this.totalFitness; } /** * Roulette Wheel Selection * @return */ public Individual rouletteWheelSelection() { // Calculate sum of all chromosome fitnesses in population - sum S. double randNum = rand.nextDouble() * this.totalFitness; int i; for (i = 0; i < POPULATION_SIZE && randNum > 0; ++i) { randNum -= startPopulation[i].getFitnessValue(); } return startPopulation[i-1]; } /** * Tournament Selection * @return */ public Individual tournamentSelection() { double randNum = rand.nextDouble() * this.totalFitness; // Get random number of population (add 1 to stop nullpointerexception) int k = rand.nextInt(POPULATION_SIZE) + 1; int i; for (i = 1; i < POPULATION_SIZE && i < k && randNum > 0; ++i) { randNum -= startPopulation[i].getFitnessValue(); } return startPopulation[i-1]; } /** * Finds the best individual * @return */ public Individual findBestIndividual() { int idxMax = 0; double currentMax = 0.0; double currentMin = 1.0; double currentVal; for (int idx = 0; idx < POPULATION_SIZE; ++idx) { currentVal = startPopulation[idx].getFitnessValue(); if (currentMax < currentMin) { currentMax = currentMin = currentVal; idxMax = idx; } if (currentVal > currentMax) { currentMax = currentVal; idxMax = idx; } } // Double check to see if this has the right one //System.out.println(startPopulation[idxMax].getFitnessValue()); // Maximisation return startPopulation[idxMax]; } /** * One Point Crossover * @param firstPerson * @param secondPerson * @return */ public static Individual[] onePointCrossover(Individual firstPerson, Individual secondPerson) { Individual[] newPerson = new Individual[2]; newPerson[0] = new Individual(); newPerson[1] = new Individual(); int size = Individual.SIZE; int randPoint = rand.nextInt(size); int i; for (i = 0; i < randPoint; ++i) { newPerson[0].setGene(i, firstPerson.getGene(i)); newPerson[1].setGene(i, secondPerson.getGene(i)); } for (; i < Individual.SIZE; ++i) { newPerson[0].setGene(i, secondPerson.getGene(i)); newPerson[1].setGene(i, firstPerson.getGene(i)); } return newPerson; } /** * Uniform Crossover * @param firstPerson * @param secondPerson * @return */ public static Individual[] uniformCrossover(Individual firstPerson, Individual secondPerson) { Individual[] newPerson = new Individual[2]; newPerson[0] = new Individual(); newPerson[1] = new Individual(); for(int i = 0; i < Individual.SIZE; ++i) { double r = rand.nextDouble(); if (r > 0.5) { newPerson[0].setGene(i, firstPerson.getGene(i)); newPerson[1].setGene(i, secondPerson.getGene(i)); } else { newPerson[0].setGene(i, secondPerson.getGene(i)); newPerson[1].setGene(i, firstPerson.getGene(i)); } } return newPerson; } public double getTotalFitness() { return totalFitness; } public static void main(String[] args) { // Initialise Environment Maze maze = new Maze(8, 8); maze.fillMaze(); // Instantiate Population //Population pop = new Population(); RunGA pop = new RunGA(maze); // Instantiate Individuals for Population Individual[] newPop = new Individual[POPULATION_SIZE]; // Instantiate two individuals to use for selection Individual[] people = new Individual[2]; Action action = null; Direction direction = null; String result = ""; /*result += "Total Fitness: " + pop.getTotalFitness() + " - Best Fitness: " + pop.findBestIndividual().getFitnessValue();*/ // Print Current Population System.out.println("Total Fitness: " + pop.getTotalFitness() + " - Best Fitness: " + pop.findBestIndividual().getFitnessValue()); // Instantiate counter for selection int count; for (int i = 0; i < MAX_ITERATIONS; i++) { count = 0; // Elitism for (int j = 0; j < ELITISM_K; ++j) { // This one has the best fitness newPop[count] = pop.findBestIndividual(); count++; } // Build New Population (Population size = Steps (28)) while (count < POPULATION_SIZE) { // Roulette Wheel Selection people[0] = pop.rouletteWheelSelection(); people[1] = pop.rouletteWheelSelection(); // Tournament Selection //people[0] = pop.tournamentSelection(); //people[1] = pop.tournamentSelection(); // Crossover if (rand.nextDouble() < CROSSOVER_PROB) { // One Point Crossover //people = onePointCrossover(people[0], people[1]); // Uniform Crossover people = uniformCrossover(people[0], people[1]); } // Mutation if (rand.nextDouble() < MUTATION_PROB) { people[0].mutate(); } if (rand.nextDouble() < MUTATION_PROB) { people[1].mutate(); } // Add to New Population newPop[count] = people[0]; newPop[count+1] = people[1]; count += 2; } // Make new population the current population pop.setPopulation(newPop); // Re-evaluate the current population //pop.evaluate(); pop.evaluate(maze, newPop); // Print results to screen System.out.println("Total Fitness: " + pop.totalFitness + " - Best Fitness: " + pop.findBestIndividual().getFitnessValue()); //result += "\nTotal Fitness: " + pop.totalFitness + " - Best Fitness: " + pop.findBestIndividual().getFitnessValue(); } // Best Individual Individual bestIndiv = pop.findBestIndividual(); //return result; } } I have uploaded the full project to RapidShare if you require the extra files, although if needed I can add the code to them here. This problem has been depressing me for days now and if you guys can help me I will forever be in your debt.

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  • How to correctly calculate FPS in XNA?

    - by Tomek Tarczynski
    I wrote a component to display current FPS. The most important part of it is: public override void Update(GameTime gameTime) { elapseTime += (float)gameTime.ElapsedRealTime.TotalSeconds; frameCounter++; if (elapseTime > 1) { FPS = frameCounter; frameCounter = 0; elapseTime = 0; } base.Update(gameTime); } In most cases it works ok, but recently I had a problem. When I put following code into Update method of game strange thing starts to happen. if (threadPath == null || threadPath.ThreadState != ThreadState.Running) { ThreadStart ts = new ThreadStart(current.PathFinder.FindPaths); threadPath = new Thread(ts); threadPath.Priority = ThreadPriority.Highest; threadPath.Start(); } Main idea of this code is to run pathFinding algorithm in different thread all the time. By strange things I mean that sometimes FPS drasticly decreases, this is obvious, but displayed FPS changes more often than once a second. If I understand this code FPS can't change more often than once a second. Can someone explain me what's going on?

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  • Boosting my GA with Neural Networks and/or Reinforcement Learning

    - by AlexT
    As I have mentioned in previous questions I am writing a maze solving application to help me learn about more theoretical CS subjects, after some trouble I've got a Genetic Algorithm working that can evolve a set of rules (handled by boolean values) in order to find a good solution through a maze. That being said, the GA alone is okay, but I'd like to beef it up with a Neural Network, even though I have no real working knowledge of Neural Networks (no formal theoretical CS education). After doing a bit of reading on the subject I found that a Neural Network could be used to train a genome in order to improve results. Let's say I have a genome (group of genes), such as 1 0 0 1 0 1 0 1 0 1 1 1 0 0... How could I use a Neural Network (I'm assuming MLP?) to train and improve my genome? In addition to this as I know nothing about Neural Networks I've been looking into implementing some form of Reinforcement Learning, using my maze matrix (2 dimensional array), although I'm a bit stuck on what the following algorithm wants from me: (from http://people.revoledu.com/kardi/tutorial/ReinforcementLearning/Q-Learning-Algorithm.htm) 1. Set parameter , and environment reward matrix R 2. Initialize matrix Q as zero matrix 3. For each episode: * Select random initial state * Do while not reach goal state o Select one among all possible actions for the current state o Using this possible action, consider to go to the next state o Get maximum Q value of this next state based on all possible actions o Compute o Set the next state as the current state End Do End For The big problem for me is implementing a reward matrix R and what a Q matrix exactly is, and getting the Q value. I use a multi-dimensional array for my maze and enum states for every move. How would this be used in a Q-Learning algorithm? If someone could help out by explaining what I would need to do to implement the following, preferably in Java although C# would be nice too, possibly with some source code examples it'd be appreciated.

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  • What do these MS DTC Exceptions mean?

    - by David B
    I wrote a program to demonstrate the behavior of DTC timeouts with multiple threads. I'm getting several exceptions, seemingly at random. Are all of these simple Timeouts, or are some of them indicative of deeper problems (connection pool interactions, etc)? The Microsoft Distributed Transaction Coordinator (MS DTC) has cancelled the distributed transaction. Distributed transaction completed. Either enlist this session in a new transaction or the NULL transaction. The transaction associated with the current connection has completed but has not been disposed. The transaction must be disposed before the connection can be used to execute SQL statements. The operation is not valid for the state of the transaction. ExecuteReader requires an open and available Connection. The connection's current state is closed. Here's the data part of the code: using (DemoDataDataContext dc1 = new DemoDataDataContext(Conn1)) using (DemoDataDataContext dc2 = new DemoDataDataContext(Conn2)) { WriteMany(dc1, 100); //generate 100 records for insert WriteMany(dc2, 100000); //generate 100,000 records for insert Console.WriteLine("{0} : {1}", Name, " generated records for insert."); using (TransactionScope ts = new TransactionScope()) { dc1.SubmitChanges(); dc2.SubmitChanges(); ts.Complete(); } }

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  • Creating ViewResults outside of Controllers in ASP.NET MVC

    - by Craig Walker
    Several of my controller actions have a standard set of failure-handling behavior. In general, I want to: Load an object based on the Route Data (IDs and the like) If the Route Data does not point to a valid object (ex: through URL hacking) then inform the user of the problem and return an HTTP 404 Not Found Validate that the current user has the proper permissions on the object If the user doesn't have permission, inform the user of the problem and return an HTTP 403 Forbidden If the above is successful, then do something with that object that's action-specific (ie: render it in a view). These steps are so standardized that I want to have reusable code to implement the behavior. My current plan of attack was to have a helper method to do something like this: public static ActionResult HandleMyObject(this Controller controller, Func<MyObject,ActionResult> onSuccess) { var myObject = MyObject.LoadFrom(controller.RouteData). if ( myObject == null ) return NotFound(controller); if ( myObject.IsNotAllowed(controller.User)) return NotAllowed(controller); return onSuccess(myObject); } # NotAllowed() is pretty much the same as this public static NotFound(Controller controller){ controller.HttpContext.Response.StatusCode = 404 # NotFound.aspx is a shared view. ViewResult result = controller.View("NotFound"); return result; } The problem here is that Controller.View() is a protected method and so is not accessible from a helper. I've looked at creating a new ViewResult instance explicitly, but there's enough properties to set that I'm wary about doing so without knowing the pitfalls first. What's the best way to create a ViewResult from outside a particular Controller?

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  • Frame Buster Buster ... buster code needed

    - by Jeff Atwood
    Let's say you don't want other sites to "frame" your site in an <iframe>: <iframe src="http://yourwebsite.com"></iframe> So you insert anti-framing, frame busting JavaScript into all your pages: /* break us out of any containing iframes */ if (top != self) { top.location.replace(self.location.href); } Excellent! Now you "bust" or break out of any containing iframe automatically. Except for one small problem. As it turns out, your frame-busting code can be busted, as shown here: <script type="text/javascript"> var prevent_bust = 0 window.onbeforeunload = function() { prevent_bust++ } setInterval(function() { if (prevent_bust > 0) { prevent_bust -= 2 window.top.location = 'http://server-which-responds-with-204.com' } }, 1) </script> This code does the following: increments a counter every time the browser attempts to navigate away from the current page, via the window.onbeforeonload event handler sets up a timer that fires every millisecond via setInterval(), and if it sees the counter incremented, changes the current location to a server of the attacker's control that server serves up a page with HTTP status code 204, which does not cause the browser to nagivate anywhere My question is -- and this is more of a JavaScript puzzle than an actual problem -- how can you defeat the frame-busting buster? I had a few thoughts, but nothing worked in my testing: attempting to clear the onbeforeunload event via onbeforeonload = null had no effect adding an alert() stopped the process let the user know it was happening, but did not interfere with the code in any way; clicking OK lets the busting continue as normal I can't think of any way to clear the setInterval() timer I'm not much of a JavaScript programmer, so here's my challenge to you: hey buster, can you bust the frame-busting buster?

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  • How to insert inline content from one FlowDocument into another?

    - by Robert Rossney
    I'm building an application that needs to allow a user to insert text from one RichTextBox at the current caret position in another one. I spent a lot of time screwing around with the FlowDocument's object model before running across this technique - source and target are both FlowDocuments: using (MemoryStream ms = new MemoryStream()) { TextRange tr = new TextRange(source.ContentStart, source.ContentEnd); tr.Save(ms, DataFormats.Xaml); ms.Seek(0, SeekOrigin.Begin); tr = new TextRange(target.CaretPosition, target.CaretPosition); tr.Load(ms, DataFormats.Xaml); } This works remarkably well. The only problem I'm having with it now is that it always inserts the source as a new paragraph. It breaks the current run (or whatever) at the caret, inserts the source, and ends the paragraph. That's appropriate if the source actually is a paragraph (or more than one paragraph), but not if it's just (say) a line of text. I think it's likely that the answer to this is going to end up being checking the target to see if it consists entirely of a single block, and if it does, setting the TextRange to point at the beginning and end of the block's content before saving it to the stream. The entire world of the FlowDocument is a roiling sea of dark mysteries to me. I can become an expert at it if I have to (per Dostoevsky: "Man is the animal who can get used to anything."), but if someone has already figured this out and can tell me how to do this it would make my life far easier.

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  • How do I use XML prefixes in C#?

    - by Andrew Mock
    EDIT: I have now published my app: http://pastebin.com/PYAxaTHU I was trying to make console-based application that returns my temperature. using System; using System.Xml; namespace GetTemp { class Program { static void Main(string[] args) { XmlDocument doc = new XmlDocument(); doc.LoadXml(downloadWebPage( "http://www.andrewmock.com/uploads/example.xml" )); XmlNamespaceManager man = new XmlNamespaceManager(doc.NameTable); man.AddNamespace("aws", "www.aws.com/aws"); XmlNode weather = doc.SelectSingleNode("aws:weather", man); Console.WriteLine(weather.InnerText); Console.ReadKey(false); } } } Here is the sample XML: <aws:weather xmlns:aws="http://www.aws.com/aws"> <aws:api version="2.0"/> <aws:WebURL>http://weather.weatherbug.com/WA/Kenmore-weather.html?ZCode=Z5546&Units=0&stat=BOTHL</aws:WebURL> <aws:InputLocationURL>http://weather.weatherbug.com/WA/Kenmore-weather.html?ZCode=Z5546&Units=0</aws:InputLocationURL> <aws:station requestedID="BOTHL" id="BOTHL" name="Moorlands ES" city="Kenmore" state=" WA" zipcode="98028" country="USA" latitude="47.7383346557617" longitude="-122.230278015137"/> <aws:current-condition icon="http://deskwx.weatherbug.com/images/Forecast/icons/cond024.gif">Mostly Cloudy</aws:current-condition> <aws:temp units="&deg;F">40.2</aws:temp> <aws:rain-today units=""">0</aws:rain-today> <aws:wind-speed units="mph">0</aws:wind-speed> <aws:wind-direction>WNW</aws:wind-direction> <aws:gust-speed units="mph">5</aws:gust-speed> <aws:gust-direction>NW</aws:gust-direction> </aws:weather> I'm just not sure how to use XML prefixes correctly here. What is wrong with this?

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  • Unable to debug XBAP with Visual Studio 2010

    - by Oleg I.
    Just migrated my project to Visual Studio 2010, but target framework was left 3.5. Project contains an XBAP app in partial trust and a bunch of WCF services. Debugging is configured to start PresentationHost.exe with -debug and -debugSecurityZoneUrl parameters. Under VS2008 everything works fine, and in VS2010 Beta2 (don't sure about RC), but under VS2010 RTM debugging is for some reason doesn't working. Application runs, but doesn't hit any breakpoint. And if for example exception occurs, message box appears "Do you wish to debug or close..." and after I choose "debug" option new weird message box appears: --------------------------- Warning --------------------------- A debugger is attached to PresentationHost.exe but not configured to debug this unhandled exception. To debug this exception, detach the current debugger. An unhandled exception was raised from Microsoft .NET Framework v 1.0, 1.1, or 2.0, but the current debugger is configured to debug Microsoft .NET Framework v4.0 code. Examine the exception using the SOS tool. --------------------------- OK --------------------------- And where is the vaunted multitargeting? Did anyone have already bumped into same issue? UPDATE: Tried to debug with "Start browser with URL" option. Debugging is working, but I get SecurityException. So it is possible, just need to figure out how to make it work with "Start external program" option. UPDATE2: Checked what PresentationHost is actually loads in both scenarios: "Start external program" - Latest version (4.0.31106.0) from C:\Windows\System32\ "Start browser with URL" - Old version (3.0.6920.4902) from C:\Windows\winsxs\x86_wpf-presentationhostexe_31bf3856ad364e35_6.1.7600.16385_none_6fca8974817173aa

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  • IIS: No Session being handed out, but only in production

    - by Wayne
    I've reproduced this in a simple project - details below. It's a WCF service in ASP.NET compatibility mode. What I'm seeing is that when run on the dev machine (Win7), a HTTP session id is available inside the service operation (HttpContext.Current.Session is non-null). But when deployed to the server (Win2k8R2), I get "No session". On both machines the app is configured to use the classic app pool, and the app pools themselves are configured identically as far as I can tell. The only differences I can discern between the two applications is that on the dev box, under "Handler Mappings", ISAPI-dll is disabled (not on the server), and on the server there's a spurious handler called "AboMapperCustom-7105160" (does not exist on the dev box). What should I be looking at next? Am I missing something head-slappingly simple? Service is this: [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class Service2 { [OperationContract] public string DoWork() { if (HttpContext.Current != null) { if (HttpContext.Current.Session != null) { return "SessionId: " + HttpContext.Current.Session.SessionID; } else { return "No Session"; } } else { return "No Context"; } } } Config is: <?xml version="1.0" encoding="UTF-8"?> <configuration> <configSections> <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net, Version=1.2.9.0, Culture=neutral, PublicKeyToken=b32731d11ce58905" /> <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> <log4net> <appender name="LogFile" type="log4net.Appender.RollingFileAppender"> <file value="C:\Temp\Test.log4net.log" /> <rollingStyle value="Once" /> <maxSizeRollBackups value="10" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%d{ISO8601} [%5t] %-5p %c{1} %m%n" /> </layout> </appender> <root> <level value="DEBUG" /> <appender-ref ref="LogFile" /> </root> </log4net> <appSettings /> <connectionStrings /> <system.web> <compilation debug="true"> <assemblies> <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /> <add assembly="System.Data.DataSetExtensions, 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.Xml.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="Windows" /> <!-- 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> </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" /> </httpHandlers> <httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, 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> </compilers> </system.codedom> <!-- 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> <validation validateIntegratedModeConfiguration="false" /> <modules> <remove name="ScriptModule" /> <add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </modules> <handlers> <remove name="WebServiceHandlerFactory-Integrated" /> <remove name="ScriptHandlerFactory" /> <remove name="ScriptHandlerFactoryAppServices" /> <remove name="ScriptResource" /> <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" /> </handlers> </system.webServer> <runtime> <assemblyBinding appliesTo="v2.0.50727" xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35" /> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0" /> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35" /> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0" /> </dependentAssembly> </assemblyBinding> </runtime> <system.serviceModel> <bindings> <basicHttpBinding> <binding name="BasicHttpBinding_Service2" maxBufferSize="2147483647" maxReceivedMessageSize="2147483647"> <security mode="TransportCredentialOnly"> <transport clientCredentialType="Windows" /> </security> </binding> </basicHttpBinding> </bindings> <serviceHostingEnvironment aspNetCompatibilityEnabled="true" /> <behaviors> <serviceBehaviors> <behavior name="WebApplication3.Service2Behavior"> <serviceMetadata httpGetEnabled="true" /> <serviceDebug includeExceptionDetailInFaults="false" /> </behavior> </serviceBehaviors> </behaviors> <services> <service behaviorConfiguration="WebApplication3.Service2Behavior" name="WebApplication3.Service2"> <endpoint address="" binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_Service2" contract="WebApplication3.Service2" /> </service> </services> </system.serviceModel> <system.diagnostics> <sources> <source name="System.ServiceModel" switchValue="Information, ActivityTracing" propagateActivity="true"> <listeners> <add name="traceListener" type="System.Diagnostics.XmlWriterTraceListener" initializeData="c:\Temp\Test2.svclog" /> </listeners> </source> </sources> <trace autoflush="true" indentsize="4"> <listeners> <add name="traceListener2" type="System.Diagnostics.TextWriterTraceListener" initializeData="c:\Temp\Test.log" traceOutputOptions="DateTime" /> </listeners> </trace> </system.diagnostics> </configuration> Testing with a simple console app: class Program { static void Main(string[] args) { ServiceReference1.Service2Client client = new ServiceReference1.Service2Client(); Console.WriteLine(client.DoWork()); Console.ReadKey(); } }

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  • Downloading file from server (asp.net) to IE8 Content-Disposition problem with file name

    - by David
    I am downloading a file from the server/database via aspx page. When using the content-disposition inline the document opens in correct application but the file name is the same as the web page. I want the document to open in say MS Word but with the correct file name. Here is the code that I am using Response.Buffer = true; Response.ClearContent(); Response.ClearHeaders(); Response.Clear(); Response.ContentType = MimeType(fileName); //function to return the correct MIME TYPE Response.AddHeader("Content-Disposition", @"inline;filename=" + fileName); Response.AddHeader("Content-Length", image.Length.ToString()); Response.BinaryWrite(image); Response.Flush(); Response.Close(); So again, I want the file to open in MS Word with the correct document file name so that the user can properly save/view. Ideas? thanks

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  • Filter Dynamically Calendar View SharePoint

    - by lerac
    Hello world I'm using SP wss 3.0 wondering if anybody knows how to filter a calendar view in SharePoint dynamically based upon the current user. It's not the simple question of using [ME] because this will not work with single line text fields. Also users do not add the items, they are being imported. So filtering on the basis of Created by, Modified by, Assigned to, or People picking data is not a option. Already managed to get to the current user in a jScript variable, now I would like to filter it in the calendar view. Been searching for a long time now, but can't seem to find anything. Altough filtering with a all items view is possible, yet I can't seem to find a way to dynamically filter a calendar view. Already tried modifing allitems.aspx view page in Designer Fooling around with CAML jScript (as far as I know) Calculated views Google (find more other cool things then a solution) Ofcourse I don't expect a solution on a silver platter (ofcourse would be nice ;) ), but if somebody can point me into a direction I already would be quite happy.

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  • Process: Unable to start service com.google.android.gms.checkin.CheckinService with Intent

    - by AndyRoid
    I'm trying to build a Google map application but keep receiving this in my LogCat. I have all the permissions and meta-data set in my manifest, but am still dumbfounded by this error. Have looked everywhere on SO for this specific error but found nothing relating to com.google.android.gms.checkin A little bit about my structural hierarchy. MainActivity extends ActionBarActivity with three tabs underneath actionbar. Each tab has it's own fragment. On the gMapFragment I create a GPSTrack object from my GPSTrack class which extends Service and implements LocationListener. The problem is that when I start the application I get this message: I have all my libraries imported properly and I even added the google-play-services.jar into my libs folder. I also installed Google Play Services APKs through CMD onto my emulator. Furthermore the LocationManager lm = = (LocationManager) mContext.getSystemService(LOCATION_SERVICE); in my GPSTrack class always returns null. Why is this and how can I fix these issues? Would appreciate an explanation along with solution too, I want to understand what's going on here. ============== Code: gMapFragment.java public class gMapFragment extends SupportMapFragment { private final String TAG = "gMapFragment"; private GoogleMap mMap; protected SupportMapFragment mapFrag; private Context mContext = getActivity(); private static View view; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (view != null) { ViewGroup parent = (ViewGroup) view.getParent(); if (parent != null) { parent.removeView(view); } } try { super.onCreateView(inflater, container, savedInstanceState); view = inflater.inflate(R.layout.fragment_map, container, false); setupGoogleMap(); } catch (Exception e) { /* * Map already there , just return as view */ } return view; } private void setupGoogleMap() { mapFrag = (SupportMapFragment) getFragmentManager().findFragmentById( R.id.mapView); if (mapFrag == null) { FragmentManager fragManager = getFragmentManager(); FragmentTransaction fragTransaction = fragManager .beginTransaction(); mapFrag = SupportMapFragment.newInstance(); fragTransaction.replace(R.id.mapView, mapFrag).commit(); } if (mapFrag != null) { mMap = mapFrag.getMap(); if (mMap != null) { setupMap(); mMap.setOnMapClickListener(new OnMapClickListener() { @Override public void onMapClick(LatLng point) { // TODO your click stuff on map } }); } } } @Override public void onAttach(Activity activity) { super.onAttach(activity); Log.d("Attach", "on attach"); } @Override public void onDetach() { super.onDetach(); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public void onResume() { super.onResume(); } @Override public void onPause() { super.onPause(); } @Override public void onDestroy() { super.onDestroy(); } private void setupMap() { GPSTrack gps = new GPSTrack(mContext); // Enable MyLocation layer of google map mMap.setMyLocationEnabled(true); Log.d(TAG, "MyLocation enabled"); // Set Map type mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL); // Grab current location **ERROR HERE/Returns Null** Location location = gps.getLocation(); Log.d(TAG, "Grabbing location..."); if (location != null) { Log.d(TAG, "location != null"); // Grab Latitude and Longitude double latitude = location.getLatitude(); double longitude = location.getLongitude(); Log.d(TAG, "Getting lat, long.."); // Initialize LatLng object LatLng latLng = new LatLng(latitude, longitude); Log.d(TAG, "LatLng initialized"); // Show current location on google map mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); // Zoom in on google map mMap.animateCamera(CameraUpdateFactory.zoomTo(20)); mMap.addMarker(new MarkerOptions().position( new LatLng(latitude, longitude)).title("You are here.")); } else { gps.showSettingsAlert(); } } } GPSTrack.java public class GPSTrack extends Service implements LocationListener{ private final Context mContext; private boolean isGPSEnabled = false; //See if network is connected to internet private boolean isNetworkEnabled = false; //See if you can grab the location private boolean canGetLocation = false; protected Location location = null; protected double latitude; protected double longitude; private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 10; //10 Meters private static final long MINIMUM_TIME_CHANGE_FOR_UPDATES = 1000 * 60 * 1; //1 minute protected LocationManager locationManager; public GPSTrack(Context context) { this.mContext = context; getLocation(); } public Location getLocation() { try { //Setup locationManager for controlling location services **ERROR HERE/Return Null** locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE); //See if GPS is enabled isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); //See if Network is connected to the internet or carrier service isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); if (!isGPSEnabled && !isNetworkEnabled) { Toast.makeText(getApplicationContext(), "No Network Provider Available", Toast.LENGTH_SHORT).show(); } else { this.canGetLocation = true; if (isNetworkEnabled) { locationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER, MINIMUM_TIME_CHANGE_FOR_UPDATES, MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, this); Log.d("GPS", "GPS Enabled"); if (locationManager != null) { location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); } } } } } catch (Exception e) { e.printStackTrace(); } return location; } public void stopUsingGPS() { if (locationManager != null) { locationManager.removeUpdates(GPSTrack.this); } } public double getLatitude() { if (location != null) { latitude = location.getLatitude(); } return latitude; } public double getLongitude() { if (location != null) { longitude = location.getLongitude(); } return longitude; } public boolean canGetLocation() { return this.canGetLocation; } public void showSettingsAlert() { AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); //AlertDialog title alertDialog.setTitle("GPS Settings"); //AlertDialog message alertDialog.setMessage("GPS is not enabled. Do you want to go to Settings?"); alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); mContext.startActivity(i); } }); alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub dialog.cancel(); } }); alertDialog.show(); } @Override public void onLocationChanged(Location location) { // TODO Auto-generated method stub } @Override public void onStatusChanged(String provider, int status, Bundle extras) { // TODO Auto-generated method stub } @Override public void onProviderEnabled(String provider) { // TODO Auto-generated method stub } @Override public void onProviderDisabled(String provider) { // TODO Auto-generated method stub } @Override public IBinder onBind(Intent intent) { // TODO Auto-generated method stub return null; } } logcat 06-08 22:35:03.441: E/AndroidRuntime(1370): FATAL EXCEPTION: main 06-08 22:35:03.441: E/AndroidRuntime(1370): Process: com.google.android.gms, PID: 1370 06-08 22:35:03.441: E/AndroidRuntime(1370): java.lang.RuntimeException: Unable to start service com.google.android.gms.checkin.CheckinService@b1094e48 with Intent { cmp=com.google.android.gms/.checkin.CheckinService }: java.lang.SecurityException: attempting to read gservices without permission: Neither user 10053 nor current process has com.google.android.providers.gsf.permission.READ_GSERVICES. 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2719) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ActivityThread.access$2100(ActivityThread.java:135) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1293) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.os.Handler.dispatchMessage(Handler.java:102) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.os.Looper.loop(Looper.java:136) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ActivityThread.main(ActivityThread.java:5017) 06-08 22:35:03.441: E/AndroidRuntime(1370): at java.lang.reflect.Method.invokeNative(Native Method) 06-08 22:35:03.441: E/AndroidRuntime(1370): at java.lang.reflect.Method.invoke(Method.java:515) 06-08 22:35:03.441: E/AndroidRuntime(1370): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 06-08 22:35:03.441: E/AndroidRuntime(1370): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 06-08 22:35:03.441: E/AndroidRuntime(1370): at dalvik.system.NativeStart.main(Native Method) 06-08 22:35:03.441: E/AndroidRuntime(1370): Caused by: java.lang.SecurityException: attempting to read gservices without permission: Neither user 10053 nor current process has com.google.android.providers.gsf.permission.READ_GSERVICES. 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ContextImpl.enforce(ContextImpl.java:1685) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ContextImpl.enforceCallingOrSelfPermission(ContextImpl.java:1714) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.content.ContextWrapper.enforceCallingOrSelfPermission(ContextWrapper.java:572) 06-08 22:35:03.441: E/AndroidRuntime(1370): at imq.c(SourceFile:107) 06-08 22:35:03.441: E/AndroidRuntime(1370): at imq.a(SourceFile:121) 06-08 22:35:03.441: E/AndroidRuntime(1370): at imq.a(SourceFile:227) 06-08 22:35:03.441: E/AndroidRuntime(1370): at bwq.c(SourceFile:166) 06-08 22:35:03.441: E/AndroidRuntime(1370): at com.google.android.gms.checkin.CheckinService.a(SourceFile:237) 06-08 22:35:03.441: E/AndroidRuntime(1370): at com.google.android.gms.checkin.CheckinService.onStartCommand(SourceFile:211) 06-08 22:35:03.441: E/AndroidRuntime(1370): at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2702) AndroidManifest <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.app" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="19" /> <uses-permission android:name="com.curio.permission.MAPS_RECEIVE" /> <uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" /> <uses-feature android:name="android.hardware.camera" android:required="true" /> <uses-feature android:glEsVersion="0x00020000" android:required="true" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.app.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" /> <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="AI........................" /> </application>

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  • Bluetooth development on Windows mobile 6 C#

    - by cheesebunz
    Hi everyone, i recently started on a project which is a puzzle slider game. This application will be using the Bluetooth, and i'm working on the mobile,Samsung omnia i900. This is how my application will work. Any user with this Samsung device plays the game and starts sliding the tiles. There is an option to search and connect to other users with the same device and application, so that they can solve the puzzle together. Right now, i'm working on the Bluetooth Part but am still new to the API. I'm using the 32feet.NET inthehandpersonal.net class library while encountering much difficulties. I am able to search for devices by using: private void btnSearch_Click(object sender, EventArgs e) { BluetoothRadio.PrimaryRadio.Mode = RadioMode.Discoverable; BluetoothRadio myRadio = BluetoothRadio.PrimaryRadio; lblSearch.Text = "" + myRadio.LocalAddress.ToString(); bluetoothClient = new BluetoothClient(); Cursor.Current = Cursors.WaitCursor; BluetoothDeviceInfo[] bluetoothDeviceInfo = { }; bluetoothDeviceInfo = bluetoothClient.DiscoverDevices(10); comboBox1.DataSource = bluetoothDeviceInfo; comboBox1.DisplayMember = "DeviceName"; comboBox1.ValueMember = "DeviceAddress"; comboBox1.Focus(); Cursor.Current = Cursors.Default; } Well, to be honest this is a rip off from some sources i found on the internet but i do understand this part. Next i went on to trying to sending a simple "testing.txt" file and i'm stucked at it. I think i will be using something like the OBEX and Obexwebrequest, obexwebresponse, Uri etc. Could anyone explain it in simple terms for me so that i could understand what they are so that i could continue pairing and etc on Bluetooth development. Sorry making it this long, really appreciate if anyone did waste some time reading it :). Hope alanM sees this :) i'm using their bluetooth library.

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  • Rails - MS-SQL Server problems (unixODBC, FreeTDS) on Mac 10.6

    - by TMB
    Followed the instructions on the Rails wiki and have had success connecting to SQL Server 2000 with TSQL -- both with DSN-less and DNS connections. I'm running Mac OS X 10.6.3. Wiki instructions here. Installed ruby-odbc, dbi (0.4.0), dbd-odbc (2.4.5), activerecord-sqlserver-adapter (2.3.5). In my database.yml (Rails 2.3.6): development: adapter: sqlserver mode: ODBC dsn: 'DRIVER=/usr/local/lib/libtdsodbc.so;TDS_Version=8.0;SERVER=mssql01.discountasp.net;DATABASE=DB_164368_dmusd;Port=1433;uid=DB_164368_dmusd_user;pwd=Schools77;' This yields the following error: ODBC::Error: S1090 (0) [unixODBC][Driver Manager]Invalid string or buffer length When I attempt to use a DSN connection, I get the following error: ODBC::Error: IM002 (0) [unixODBC][Driver Manager]Data source name not found, and no default driver specified I have in fact verified that the FreeTDS driver (libtdsodbc.so) is installed and the path correct. Can anyone spot the error of my ways? Thanks in advance.

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  • Java: How to have an ArrayList as instance variable of an object?

    - by JDelage
    All, I'm working on a class project to build a little Connect4 game in Java. My current thinking is to have a class of Columns that have as instance variable a few integers (index, max. length, isFull?) and one ArrayList to receive both the integers above and the plays of each players (e.g., 1's and 0's standing for X's and O's). This is probably going to be split between 2 classes but the question remains the same. My current attempt looks like this: import java.util.ArrayList; public class Conn4Col { public int hMax; public int index; public final int initialSize = 0; public final int fullCol = 0; public ArrayList<Integer>; (...)} Unfortunately, this doesn't compile. The compiler says an is missing where my ArrayList declaration stands. We're just starting objects and we haven't really looked into other instance variables than the basic types. Can someone tell me where my error is and how to correct it? Many thanks, JDelage

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